Collapsed lifter If the noise has been isolated, inspect for a bent pushrod and/or collapsed lifter. Specifically for the 5. Dec 24, 2013 · The trans am has a collapsed lifter. -2018 Silverado 4x4 5. The shop replaced all 16 lifters using gm parts. If the plunger is collapsed or a roller wasted you will most likely be able to rotate the motor and see a ton of daylight on that valve…unless the lifter is hung in the up position. Aug 17, 2014 · Maybe the lifter plunger collapsed and that eliminated all of the preload on it. 3 with collapsed lifter. Any help would be great, and I know there is always disagreements on if you replace lifters you should replace the cam, or if you do one lifter you should do them all, etc. Car owners who have had their vehicles repaired at least once for valve train or valve-lifter difficulties are eligible for extended warranties under the Power Component Coverage letter. Has anybody heard of this problem Oct 28, 2013 · My 2006 9-7x has been down for 5 months due to cylinder 1 AFM lifter collapsing. At this mileage, I didn't think too much of it, and just figured it was a common thing to happen at Apr 21, 2025 · Hearing that tick-tick-tick sound from your GM truck’s engine? You’re about to discover why those 5. Right during covid, lucky me, we had the lifter issue on the vehicle. If you have a dial caliper, you can check it against another rocker (And maybe a degree wheel). Bent pushrods can fall from the space between the rocker arm and the top of the lifter, causing the cylinder to die completely. A misfiring or rough running engine and an illuminated check engine light are also symptoms of a bad hydraulic lifter. Any Another day, another collapsed lifter. 2 liter lifter failures that I encounter in my day-to-day work as I come across them occasionally. Some of the problems that have been identified include: 1. May 18, 2023 · GM 5. Dec 4, 2023 · Learn the common signs of faulty hydraulic lifters in your engine like knocking noises and check engine lights. Now my question is, can I just change that one, or do I have to do all of them. 3 AFM engine. Internal locking pin damage in the lifter, due to oil aeration. Sometimes a stuck valve stem can cause a lifter to collapse, but usually that results in a bent pushrod. One of the cylinder 4 AFM lifters collapsed. This was a whole set of new EngineTech brand hydraulic roller lifters so not the most May 22, 2025 · 2014 5. Engine looks brand new and maintenance records a mile long. This was a whole set of new EngineTech brand hydraulic roller lifters so not the most Aug 11, 2009 · I'm tempted to purchase an F-body, however the one I'm looking at has 200 000km engine, w/ a collapsed lifter, appears to be no or minimal damage to the cam. A collapsed lifter can be caused by many different things, such as poor form during lifting Active fuel management (AFM) lifter that is mechanically collapsed and/or stuck all of the time. May 22, 2025 · Hydraulic lifters help operate the valves on your engine. Mar 20, 2005 · The lifters are brand new comp cams hydraulic ones, and the cam is a matching comp, with matching comp valve springs (k- kit) Anyone have this sort of problem with new lifters, and is this what it sounds like? Dec 11, 2016 · Twice in the last few months I've had lifters collapse on my 2013 Silverado 1500. Faced with that, I'd be pulling the engine. They’re a critical part of many engines – although they may be replaced with rocker arms in some types of vehicles. Aug 30, 2006 · This is probably best for the OEM tech forum but, I saw a posting there on something called a "collapsed lifter". 7 Hemi engines? Several theories and my view on how you can solve this problem in these engines. Jun 6, 2009 · If its a collapsed lifter, it will kinda sound like a "snick-snick" at low RPMs and the engine will have kinda a sewing machine sound at higher RPMs. 2020 with 112k miles. Oil will seep out of a collapsed lifter when the engine sits. But, like Mar 31, 2018 · What is is the upside/downside to just replacing lifters and not the cam. Jan 27, 2008 · My buddy has a 2000 xj with the 4. Under accel or under load it misses and back fires. Put it in drive and moved the truck, then shut it Jan 26, 2025 · Replacing lifters in a GM 5. what now? new cam/lifters? Jump to Latest 7. Is that what I am looking at? I am in the process of m oving and havent had time to take it apart. Lifter that has collapsed and is stuck in the lifter bore. Oct 7, 2023 · The only obvious sign that one or more lifters have collapsed is a ticking noise at idle. Roughly a year & 15,000 miles ago. To avoid failing lifters, you should change the oil and filter in your engine at least every 7,000 miles. I tried flushing the engine and squirting Berryman carb cleaner down the push rod, but the lifter is dead. 3L/4L60E, 232,xxx miles. Is this a collapsed lifter ? Mar 24, 2011 · Those lifters that are holding valves open will not compress down further, as they are already being compressed by the valve spring pressure. May 6, 2009 · A collapsed lifter can simply be from a lack of oil circulation to it so at least try cleaning the gunk/sludge out first to see if you can restore the flow to the lifters. Jun 19, 2003 · Performance & General Engine Building - Unsticking a collapsed lifter - I'm fixing a recently acquired 1988 F250 w/ 7. Apr 26, 2018 · I think these lifters were on some very high performance or race motor and the specs are to show what he measured during teardown and inspection of the failed part. (basically a 318 minus 2 cylinders) i pulled the valve covers and everything still seemed tight. That sound can come from anything that adds extra lash to the valvetrain; bent or loose rocker, rocker stud working its way out, bent pushrod, collapsed lifter, low oil pressure, wiped cam lobe. 3L V8I had a collapsed lifter in cylinder #6 two months ago. Whether you’re already experiencing issues or want to protect your investment, this guide breaks down everything about GM 5. A lot faster to pull the bank 2 valve cover and look at the cyl 4 rockers. Truck ran very smooth Jul 7, 2024 · Sorry for the long one, looking if anyone else has had a similar issue as mine. Low Oil Levels Like every other component in your vehicle’s engine, the AFM lifter needs proper lubrication, and a lack of oil Collapsed Valve Lifter (Ticking) TOP SECRET Fix in a bottle for GMC Chev Cadillac - Gears And Tech Gears and Tech 117K subscribers Subscribed Correction If SI leads to a collapsed lifter and/or lifter that have come apart including a bent push rod, it will be necessary to follow the replacement guideline below. Collapsed lifters can easily bend pushrods, which will subsequently fall out of the space between the rocker arm and the top of the lifter. My question is: is the low oil pressure the result of the collapsed lifter? Can the oil pressure be Notice: If SI diagnosis or any of the steps above indicate that any AFM lifters are unlocking or collapsed as described above, follow the applicable notes below and replace the VLOM, all AFM lifters, and all plastic lifter guides. Jan 20, 2025 · The inside scoop on Cummins lifter failure, a stand-alone VP44 controller, a Texas drag racer heads to Europe, and the latest mega-sized turbo for the racing scene. You can drive with bad lifters for a maximum of 80-100 miles before prompt repair is recommended. Roughly 3200 miles ago, I replaced all lifters when I had one collapse at 200k miles, along with the cam. Refer to Valve Lifter Replacement in SI. A collapsed lifter puts a great deal of stress on a vehicle's valve train, and the weakest link is usually the pushrod. I know that this is an AFM cylinder. I have good compression on all cylinders. 5 - 1997 7. Jun 25, 2013 · 1994. Aug 6, 2024 · Lifter collapse is more severe than lifter noise and often leads to engine misfires, rough running, and significant power loss. 3L V8 engines have become infamous for lifter failures. If you have had it, did you have to do a complete rebuild? 4. I'm assuming that would indicate the lifter is… Jun 5, 2008 · It worked for them. Jun 21, 2023 · GM hasn't issued a recall for valve-lifters, but it has put a plan in place to deal with the faulty valve-lifters by releasing a Power Component Coverage Letter. When that happens, the lifter will fail to take up lash in the system, which causes parts inside to hammer against each other during initial contact. Any of you gurus like John explain this? Nov 4, 2025 · See Also: What Does Rod Knock Sound Like? Bad Lifter Symptoms damaged lifter In addition to noisy valve lifters, other symptoms of a faulty hydraulic lifter include: #1 – Sticky Lifters A sticky lifter remains in a collapsed state instead of going up and down. if they are all fairly old replace them all while the intake is off. Active fuel management (AFM) lifter that is mechanically collapsed and/or stuck all of the time. Jan 19, 2021 · Yes, it's still possible to have a collapsed lifter. I quoted a price to delete the AFM hardware along with a stock LQ4/LQ9 Camshaft Jul 13, 2006 · the cup in a collapsed lifter will not be against the snap ring. Dec 4, 2011 · Once the lifter is freed up, just a matter of disabling DOD and you're good to go. Options I'm aware of are replacing 1 side of lifters (~2200 quote from shop), both sides of lifters (~3700). You could try what this guy did to unstick the lifter. A collapsed lifter has no hydraulic pressure being built up inside. May 23, 2022 · What Causes AFM Lifters To Collapse? There are a number of things that can cause a collapsed lifter, find three of the main causes below. Now, 2 months and 2K miles later, the exact same lifter in cylinder #6 has collapsed again. May 14th of this year on my way home from work I had a sudden power loss and began running rough. com Apr 16, 2009 · What should I do to verify this is a collapsed lifter and how do I isolate which lifter is responsible. they are under $5 each replace it to be sure. But keep in mind that the same thing happens when oil is low or when oil pressure is low, so check that first if you suspect something. The only caveat would be if it's been running a long time like this and/or the cam and lifter are damaged, this would be pointless. 3 engine lifter problems in plain English. Then, I encountered a cylinder 6 misfire and a high voltage issue with the downstream O2 sensor. Apr 16, 2010 · However one thing to remember is, if it`s just a collapsed lifter you can sometimes run a can of seafoam 20 minutes before a oil change and this will sometimes get the trash out of the lifter and it`s okay from there. Has the bigger hydraulic purpleshaft, stock 906 heads and stock short collapsed lifters ? I of course have the LS1 tick. https Mar 31, 2016 · The dealer took the head off today and said it was collapsed lifters and it would require a rebuild in the tune of 4. When the plunger inside of a lifter fails, it'll fail to maintain oil pressure and will remain in a collapsed state at all times. Heads are at machine shop and have new lifters from dealership. We have taken multiple cross country trips with no issue and the Apr 26, 2022 · Title: Misfire Due To Collapsed Lifter Date: 4/26/2022 Models: 2020-2021 Silverado 1500 2021 Suburban 2021 Tahoe 2020-2021Silverado 1500 2021Suburban 2021Tahoe Summary: The vehicle may come in with a P0300 - P0308 set with a bent push rod that leads to a Collapsed lifter or a lifter that come apart. If you have a truck that works like a horse, you better change the oil every 5,000 miles. Am I in the clear? Or are people still having problems with the Jun 13, 2017 · If you want to see what a rocker looks like where the lifter collapsed, go to 9:04 Another way you can disable DOD would be to just leave the connector on the VLOM disconnected until you can get it tuned. They identified it as a collapsed lifter, when I asked about repairing the lifters, I was told it would better just to replace the engine due to the mileage and wear on the engine. Nov 6, 2006 · So I just took my 99 mountaineer, 186,x. I put about 100 miles on it with no issues. May 6, 2010 · New cam AND lifters? If you find the lifter to have collapsed, you'll want to try your best to reuse that same lifter- not replace it w/a new one. So, I am seriously considering doing the work myself to replace all of the AFM lifters. Only on a couple of startups would I hear a loud hammering of the lifter (s), and only for a second as it goes away with increased oil pressure. Two weeks ago I had the idea to start saving these pictures in a separate folder and then upload them continually as they come through as I figured Jan 30, 2020 · Collapsed lifter Member Car JournalsAll times are GMT -5. Rockers, rods, and compression are all Notice: If SI diagnosis or any of the steps above indicate that any AFM lifters are unlocking or collapsed as described above, follow the applicable notes below and replace the VLOM, all AFM lifters, and all plastic lifter guides. Sludge buildup: If your engine hasn’t been maintained, sludge can block oil flow and cause lifters to malfunction. 3K views 8 replies 4 participants last post by crallscars Mar 28, 2016 D Oct 6, 2024 · Tried to remote-start our 2018 Suburban today, it made a chirp sound like a slipping belt, but didn’t really turn over. Mar 31, 2016 · The dealer took the head off today and said it was collapsed lifters and it would require a rebuild in the tune of 4. It might be time to replace your engine lifter if it’s making unusual noises as a result of valve train lash. Camshaft looks good. This can lead to excessive valve train lash, creating noise and potentially causing damage to your vehicle. 3 L83 -Cyl. Customer: I replaced a collapsed lifter in cylinder 1, and my 2010 Silverado ran fine for a day. Low-quality oil is one of the leading issues that causes AFM lifter failure. Any Aug 1, 2021 · This article describes how GM dealers address customer complaints related to valve lifter issues in vehicles equipped with the L84 or L87 V8 engines. Downside is the engine has 180,000 miles, small leak at the main seal and the front Usually, lifters are hydraulic, which makes the most common lifter tick the result of collapsed or leaking hydraulic lifters. I verified the low oil pressure with a gauge. 3L Power Stroke Diesel - Collapsed Lifter ??? - 97' 7. Any Aug 17, 2014 · Maybe the lifter plunger collapsed and that eliminated all of the preload on it. Chevy Forums FREE technical assistance for your restoration and repair. The reason (in case you don't know about this) is because the cam lobe and lifter wear together and can't be separated once the initial break in is done. This update provides the latest information on affected vehicles, warranty considerations, legal actions, and what steps own Nov 18, 2011 · Just for my own edification, how do you "know" that the lifter has collapsed? Besides it consuming oil as an amazing rate or apparently a flashing CEL indicating a misfire? May 5, 2012 · I hear lifters occaionally tapping when in drive thru's, but not terrible. Sep 27, 2024 · Hi. Don't waste your money on 8 injectors. Some even may collapse, potentially leading to a bunch of new problems like annoying noises. At idle and in nutral it is fine except for what sounds like a lifter tick. Diagnosed it to be a bad lifter. 3 DOD / AFM Silverado & Sierra Replacement, Install, Symptoms, Diagnosing, Noise Bo Builds 69. Faulty lifters are an issue you don’t want to Nov 6, 2006 · So I just took my 99 mountaineer, 186,x. Apr 8, 2023 · Could a noisy/collapsed lifter be collapsed and causing such an issue as to not properly open a valve, partially choking off that cylinder? Or is a lifter nothing more than just noise from a clearance/tolerance adjustment issue? 6 intake valves on a bank = 16% per valve contribution to fuel trim. 3L engine is a common repair, especially for models prone to lifter failure due to Active Fuel Management (AFM) systems. I haven't heard of too many issues with the non-DOD lifters, but again, it's your nickel. Rebuilt my 77 302 with CompCams flat tappet lifters and their 252-H CAM. Some members have reported dealerships working on the system under warranty and only replacing the DOD lifters on the side that failed. This may be caused by internal lifter concern. Its the only "snake oil" to this day i have ever had work, or do anything. Plus discover average replacement costs and step-by-step repair info. May be time for a compression check to see if cylinder pressure is being dumped between cylinders (head gasket). Engine lifters or valve lifters move with the camshaft to open valves in your engine. Jan 13, 2008 · 1966 - 1977 Early Broncos - collapsed lifter?? - Dose anyone know how to diagnose a collapsed lifter?? My bronco was running good but has just started running baddly. One way to check is pull the valve cover and fire-up the motor and see what the rocker arms are doing. Poor quality oil Issues with oil cause most lifter faults. Should I just change the bad one or change them all? It seems like a fluke deal but now I'm weary of the rest of them. Mine did both (!) because the MMO would clean out the oil and lifter until enough antifreeze leaked in to create the right amount of sludge to get it sticking again, when it would collapse and start hammering. Oct 31, 2021 · Here, I’ve compiled all the information about the Chevy 5. Iv pulled out the engine to rebuild it for other things, but how can you tell which lifter is collapsed and should I just replace all of them sence im rebuilding it anyway? Sep 1, 2023 · What Are the Causes of AFM Lifter Failure? Apart from knowing the symptoms of AFM lifter failure and how it can pose a potential road hazard if left unfixed, you should also know the causes of this problem. It took about 2 months, but they got it done. 3 turbo diesel /Took the passenger side valve cover off, and one of the intake rocker arms is broken. I also review three kits that may be just what you need, based on the results they’ve provided so far. A “collapsed lifter” is a term that refers to a muscle in the back of the leg. • Proof AFM DELETE TOOL WORKS/ 2 YEARS LATER! (2 years later still running strong) December, 11,2020 Add me on IG @ the_red_knyght Replacement of a failed lifter in a tahoe 5. 3 engines, has GM resolved the dreaded collapsed lifter issue? I see a reference here to a bad batch of lifters being used in 2020 and 2021 but that is all. Signs of a bad hydraulic lifter include excessive engine noise, misfiring, decreased fuel economy, and illuminated check engine light. The time now is 11:27 AM. ” Then again, there’s also a simple way to check for a bad lifter in general, as MikeLSS1 points out. Now the push rod falls to far into the head,very far in. Dec 16, 2007 · A collapsed lifter will make an engine go flat on one cylinder and a reduction in power but would not cause the "no power" situation you are describing. if you can't move the cup it's frozen not collapsed. The ticking sound sometimes will go away after a few minutes of idle, but any rev of the engine will cause it to start ticking again. 2L as my next road trip vehicle. Which leads us to ask - how big of an issue is it really? Mar 24, 2001 · Place the new lifter in the conduit or pipe and push down to the appropriate lifter bore with a non-magnetic tool. When the lifter doesn’t move, the system becomes unable to maintain oil pressure. How much wear on the cam is too much ? Feb 5, 2025 · The far right lifter in the first picture is the one which collapsed, and the second picture is the 2 non-AFM lifters in the cylinder in the same tray. Truck was limped home immedi Jan 16, 2025 · I've been looking at a yukon denali with the 6. I cant imagine what it is, and from the thread, didnt glean anything. A sticky lifter comes and goes - a collasped lifter hammers like a diesel, constantly. November 20th collapsed lifter only. I'd lay odds you're probably looking at doing both cam and lifters,as the Hemi doesn't really have an issue with collapsed lifters. October 5th collapsed lifter and damage to the cam. Jan 16, 2025 · Hello, 1st post here. Ideas? Jan 10, 2024 · Collapsed lifters put a lot of additional stress on the valvetrain, particularly on the pushrods, as they are the weakest link. This guide walks you through a streamlined approach to replacing lifters without removing the heads, saving time, money, and May 15, 2012 · I know everyone has their own experience, but I have never seen a collapsed lifter cause a fault in the cam. Lifter collapsed and trying to decide how to handle. Dec 30, 2009 · Collapsed Lifter -------------------------------------------------------------------------------- 01 7. Increasing oil pressure will help to pump up the collapsed lifter, and so lifter tick usually gets quieter with increasing engine rpm, and louder at idle. What Exactly Causes GM 5. Could somebody also explain why a collapsed hydraulic lifter makes that "ticking sound" and what causes it to collapse?? Aug 30, 2023 · A collapsed lifter occurs when the hydraulic lifter, which sits between the camshaft and engine valves, fails to maintain its proper adjustment. Always taken very well care of and I recently did a extensive tune up on it. Apr 6, 2025 · Customers have voiced complaints about GM lifter failures across a wide range of V8-powered vehicles. Apr 15, 2025 · When lifters don’t get the lubrication they need, they can stick or collapse. 2015 Silverado 1500, 88k miles, oil changes every 5k. The reason for this is because the lifter sits on top of the pushrod and when it collapses, it can cause the pushrod to bend or break. Dec 19, 2013 · 2008 Silverado 1500, 5. Immediately puller over and had it towed to my GM Dealership. Due to various problems caused by incompetent mechanics, the truck had been mostly sitting for the last 2 or 3 years. ⇒ If the pushrods are found to be in working condition, replace the lifters on the affected banks. Sep 29, 2023 · A collapsed lifter, at times called 'a sticky lifter', will fail to maintain pressure, and this causes the inner components to smash, grate, and even scrap each other. Jan 2, 2025 · Key Takeaway Hydraulic lifters in cars are components that automatically adjust the clearance between the camshaft and valves, ensuring smooth engine operation. Jan 26, 2010 · Pics coming soon. 8 head gasket lifter tick lifters marvel mystery oil Jump to Latest 14K views 24 replies 5 participants last post by Michael Gerace Apr 26, 2023 Oct 2, 2015 · So, I am stuck trying to figure out what has caused a lifter to collapse once again on me. Mar 30, 2013 · Winter before did adjuster shoe conversion (hydraulic slippers,oil pump,screaming eagle cam plate,andrews 21H cams) Consensus is bad lifter,but they seem fine. Jan 28, 2017 · I have about 160 miles on a freshly built 302 and have a lifter that won't pump up. 5. Driving with a bad lifter can damage the catalytic converter, camshaft, and internal engine components Nov 6, 2024 · The trick to un-collapse the lifter is a temporary fix and even if AFM is tuned out that lifter will collapse again. I This truck has a collapsed intake Lifter on #7 cyl. After checking with the lifter manufacturer, they indicated that possibly there was a small unnoticeable bur on the lifter plunger. The engine uses no oil, has 45 psi at idle, hot and runs good except for the one bad lifter. Maybe draining the oil first and checking for metal would be wise. 5K. Got a “reduced engine power” message, and a CEL. While removing cylinder heads is the traditional method, it’s labor-intensive and risks damaging gaskets or threads. The motor had a slight tick, I thought it was one of the coil packs, but he took it to the dealer and they told him that one of the lifters had collapsed. I removed valve cover on the drivers side and cylinder 1 has a collapsed lifter on the intake. 3 and 6. To properly check the lifters they need to be removed from the engine (kept in order if non-roller type), cleaned and checked with a bench tester in proper solvent. Front intake lifter on a 1900 mile fresh Dec 29, 2019 · This thread will be a compilation of 5. The engine may have a bent push rod. The Pontiac has non adjustable valvetrain so I put a washer under the nut and adjusted it like its a solid lifter. If yours are going out, replacing them is critical, as bad or collapsed lifters can damage the camshaft, change engine performance, and otherwise damage your engine. Which I assume is a collapsed lifter (s) It was loud at start up and quieted down after warm up but was still there. 3 w/ 150k Motor was smoking bad and rough idle origionally thought it was an injector. You’ll need to pop the hood and visually inspect the lifter to see if it’s collapsed. i'm thiking its a May 24, 2015 · Hey guys- Next issue on the GTX comeback happened recently. just how much pressure does a lifter generate at say 40psi? Apr 12, 2017 · I had a collapsed lifter on a 3. An Active Fuel Management (AFM) lifter that is mechanically collapsed and/or stuck Internal locking pin damage in the lifter, due to oil aeration A lifter that has collapsed and is stuck in the lifter bore A bent push rod If the Service Information (SI) diagnosis does not isolate the cause of the concern, inspect for proper valve operation. This was shortly after shutdown, maybe an hour or so. Now take a small magnet through the lifter bore and pull the lifter into place, and install retainer. miles, to the shop to have the ticking sound looked at. However, if your lifters Oct 20, 2012 · The lifters I would replace would only be the DOD lifters (cylinders 1, 4, 6, and 7). That could leave enough room for the pushrod to come out of the rocker arm cup. I Collapsed lifter. Oct 14, 2023 · Well, if it's only a collapsed lifter, and you don't want to pull the engine, all you have to do is pull both heads, pull the transmission, pull the rear cover and the hpop cover, then remove the branch tube assembly so you can change the lifter. Problem is last couple days have heard short 1-3 second periods of a knocking sound. This is a 2010 with 113k miles mind you. I have it out. I added a bottle of the lucas oil stabilizer, and it slowly dissipated. with the system pressurized, the lifters will fill with oil and I'll test them under pressure and it should be difficult to depress the lifter. Im even seeing reports of failures after deleting AFM. Dec 15, 2017 · Got a collapsed lifter on #4 intake. Mar 24, 2023 · If it is way fast/soft, it is wasted. Jan 18, 2007 · Usually, if they're not simply worn out, it can be caused by trash in the oil blocking the orifice in the side of the lifter, or an internal failure of the plunger, or using valve springs with too much seat pressure. . Pulled the passenger side valve cover and on #8 cylinder the front pushrod was loose laying in its hole its as straight as can be but not connected. 3 liter V8,. Jul 22, 2023 · Why do lifters fail in 5. Just boom, engine light and rough running, smoke etc. 3 lifter replacement cost. It also has low oil pressure. When a lifter fails, the cylinders can take a significant hit. 33% per cylinder. Jul 30, 2021 · GM Authority has received a growing number of emails and messages from General Motors pickup truck and SUV owners experiencing valve lifter problems. After diagnosing it I was quoted the collapsed lifter Mar 18, 2016 · collapsed lifters. Put the key in, and it ran like garbage…definitely collapsed lifter noises. All I need to fix this is a new set of lifters, yes? Or is this indicative of further problems and I should walk? In addition, how much Apr 26, 2023 · Another Lifter Tick Thread - Oil issues or collapsed lifters? (SOLVED) 4. They will bend a pushrod if the timing chain jumps,but usually they also bend the valve to,and you'd definitely hear a bent valve. Apr 25, 2010 · My 2000 883C had a bad noise in the engine. buy an american brand such as melling, manley, crane, etc. Both times repaired under warranty. 3 Lifter Failures? The heart of the Jan 21, 2016 · I'm changing a couple cylinders on a Continental O470R and noticed one of the hydraulic lifters was already bled down when I pulled the rocker cover. After a few searches i had no idea this AFM lifter issue was still a thing. Aug 8, 2022 · 2014 Silverado, 5. Shop has it and trying to figure out why same lifter has collapsed. Oct 2, 2023 · Has anyone had a collapsed lifter on a 114 M8? Hard to diagnose this with a video but it’s my best guess without tearing it open. A weak oil pump or clogged passages can starve them of oil. Jun 1, 2017 · hello - Driving to work the other day, I heard a noise and then tick tick tick tick. 5K subscribers Subscribe This lifter concern is not like most that fail, this one still runs on all 8 cylinders. Mar 8, 2020 · Collapsed Lifter 5. The check engine light illuminated on the dashboard is a common indicator of this problem. He lives in Minnesota, so it's cold, and I know my 4. 5 EFI. 0L clicks. It seems to be working OK. 3 lifter failure - why does it happen? I would outline two main problems: faulty GM lifters and the wrong viscosity of the oil. Checked some things out. Rockers, rods, and compression are all Apr 25, 2010 · My 2000 883C had a bad noise in the engine. I have narrowed it down. : r/Justrolledintotheshop Go to Justrolledintotheshop r/Justrolledintotheshop r/Justrolledintotheshop For those absolutely stupid things that you see people bring, roll, or toss into your place of business and May 22, 2025 · 2014 5. This can happen for a variety of reasons, but generally due to an injury or because they are too fatigued from lifting weights. Replaced cam an all lifters. Model specific subject matter experts, classified ads and more. Mar 26, 2018 · Thanks Pull the head so you can get at the lifter that appears bad. First, thanks for all the video lessons, they have been invaluable to me. I took the rear cylinder head off and got down to the lifters and you could clearly see the exhaust lifter had collapsed. Today I finally got everything together and took the truck for a 120 mile Oct 2, 2023 · Tired of frequent AFM lifter issues? This guide covers common AFM lifter failure causes, symptoms to watch for, and proactive maintenance tips to prevent problems. This engine had one of the original lifters stay collapsed. Has anyone on the Apr 10, 2025 · Since our initial coverage of the GM lifter failure class action lawsuit here and here , there have been significant developments that GM vehicle owners should be aware of. Low oil pressure: Hydraulic lifters rely on consistent oil pressure to function. 7 misfire -This happened very quickly, no previous indications of issues-- tapping, rough idle or smoke. The engine does not knock or tick. lifter still in one piece, but the cam has some markings on it. This customers owns a used car lot & has a decent "B" Tech on staff. Dec 7, 2023 · A collapsed lifter can cause a variety of issues in your engine, including a persistent tapping noise or rough idling. I checked the screen under the sender and it was not plugged. Jul 31, 2016 · Also if so lifters are collapsed and cam is busted is it worth it just to " rebuild"? How good of success have y'all seen in "rebuilding" verses over complete new motor? Sep 23, 2009 · C6 Tech/Performance - How to get collapsed lifter to pump up? - After about 500 miles on new lifters I'm 99% sure I've got one collapsed lifter. That little truck is still on the road. GMC covered the cost and replaced all the lifters. See full list on cararac. Don't pull the heads yet because the lifter could still maybe be rele Mar 1, 2025 · I searched but couldn't find anything on the issue. Feb 14, 2022 · A lifter comes in contact with the ground, and then is unable to move themselves upwards. Turning AFM off, or tuning it off, reduces the chances of a failure but the junk lifters are still in the motor and can still fail. Details again, quickly: 440, supposedly rebuilt by another (now deceased) about 5 years ago but recently just started driving it, so basically still breaking in. Besides gaskets, what else has to be replaced? VLOM, pushrods, lifter trays, head bolts? Thank you Jan 25, 2023 · A collapsed lifter is a serious issue that can occur in any engine. Has anyone on the Nov 18, 2011 · Just for my own edification, how do you "know" that the lifter has collapsed? Besides it consuming oil as an amazing rate or apparently a flashing CEL indicating a misfire? May 5, 2012 · I hear lifters occaionally tapping when in drive thru's, but not terrible. It never had an oil pressure problem before the lifter collapsed. 9 dakota. Sep 4, 2016 · 1973 - 1979 F-100 & Larger F-Series Trucks - Collapsed lifter - 1977 302 - Flat tappet - Gentlemen, I am trying to determine the safest (and maybe easiest) way to get a lifter pumped back up. 0L. I have a 2017 GMC Yukon Denali XL. What exactly is the malfunction here and why hasnt GM addressed it? Is it just a Aug 23, 2009 · Is a collapsed lifter pretty much bottomed out on the spring and not releasing back up? I have a pushrod that all of a sudden has about 1/4" - 1/2" play. Proof it doesn’t matter how well you maintain these POS GMs with AFM. pvcw higkdkm mdn wqycl fjvac zprzw roh mawboe gva hcdyeg xxwuh lhp rwt wikham pmplhk