Chevrolet lifter noise

Doug Owner/Technician California Posted   Latest  
Resolved
Drivetrain
2013 Chevrolet Avalanche 5.3L (7 LC9) 6-spd (6L80)
Lifter Noise
Misfire

Greetings All. Thought this mainly only happened to ‘04 to ’06 Chevrolet V8's where the lifters would get stuck on certain cylinders and make a lot of noise. But on this 2013 5.3 it is doing the same thing! Has anyone come across this and might it be very similar to the other motors that did that on the lifters that would get stuck or come apart?

I have yet to scope it and probably take, at the very least the valve cover off, but I thought I would ask concerning this motor and year. Thank you, Doug. 

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Aaron Diagnostician
California
Aaron
 

afm/dod cylinders are 1,4,6,7. These 5.3's have this issue even till this day on 2021 trucks. Lifters are a big problem on these. If its missing and you suspect the afm lifters, do an in cylinder or an rc to further confirm before valve cover removal or tear down. Best of luck!

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Marke Mechanic
New York
Marke
 

U might wanna check oil pressure.. it’s common too on these years where the lifters are making noise… if your opening the engine you gotta ch…e everything including camshaft cambearings. Pump lifters … the whole nine

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Robert Technician
Michigan
Robert
   

Command the AFM on with scanner see if noise is effected or goes away … If your doing the valve cover thing to look ? Just to put the valve cover back on; at least start it up and apply pressure to the rocker arm helps with squealer lifter rollers and cam lobe ID and look at valve springs , Start up AFM are unlocked …collapsed or stuck does constant ticking and more than likely misfire codes and…

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Glenn Owner/Technician
Texas
Glenn
 

Hi Doug, The best advice I can offer is to go with a DOD AFM delete reman replacement motor. With the price of vehicles going through the roof, this is an investment if the customer wants to keep it. I would not open this can of worms unless you want to be married to it. There is no such thing as a flat rate fix on these engines. None evasive testing such as an in-cylinder pressure test…

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David Technician
Georgia
David
 

Got lucky recently with 2 of these 5.3s by changing out the oil pickup o ring . Very lucky indeed…..

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Mark Engineer
Colorado
Mark
 

David Agree with your success on O-ring on pick-up tube. I might add I use O-ring from dealer and same for oil pan gasket. If engine has the screen below oil pressure sensor I change that screen also. As others have already said, sometimes it’s too late and other parts are worn too much.

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Doug Owner/Technician
California
Doug
   

Hi David. That was after doing the oil test and showing that it was low, Dropping the pan and changing that o-ring?

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David Technician
Georgia
David
 

Oil pressure showed 0-10 on cluster gauge , horrible noise slight mis ….my customers are dirt poor , I expained what the worst could involve and did the o rings as a last chance effort …that was months ago , both still running and quietly …again more luck than can be expected…..

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Benjamin Service Manager
New York
Benjamin
 

Yes they still do it. An interesting failure I'm seeing on the new motors is the lifters on the AFM cylinders don't collapse in V4 mode so they rattle pretty bad once the VLOM shuts off oil flow to them. No misfire codes when it happens since those cylinders arent monitored in V4 mode.

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Lee Owner/Technician
Missouri
Lee
 

This is how I would deal with this issue, 1- My first question to the customer is did this just happen? If so and they didn't drive it very long at all then I would proceed to step 2- Check codes and it it's a misfire on a AFM cylinder then pull valve cover and determine if the rocker is loose, if so then I tell the customer that I will remove intake and VLOM and unstick the stuck AFM lifter…

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Doug Owner/Technician
California
Doug
   

Yes Lee thank you. I have watched that and actually purchased the special tool from him. My next step is to do the oil pressure test checking the screen and replace the Oring before removing the valve cover, also in cylinder test. That's what I was thinking too, I think they didn't run it long but I will double check that.

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Troy Owner/Technician
New Jersey
Troy
 

Just had one….changed oil pump with upgraded high volume…did a service to her…quiet as a church mouse for now!!!

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Kris Owner/Technician
Oregon
Kris
 

Doug, no- this is not just an issue with the early motor- we are seeing hundreds of these fail in the year that your are working on. The root cause is likely low oil pressure as stated from the other shops. However- it commonly happens on an engine that was ran low on oil(THE GM power plants, including this year) are extermely common to burn oil- thus customer runs them low(and gets them topped…

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Doug Owner/Technician
California
Doug
 

Yes that helps a lot Kris thank you! Just exactly like it used to be on the older models. Oil pick up, oil filter, oil screen! Of course the low oil issue and lack of service is also an issue, customer related! Will be finding out more thanks again. Doug

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Denver Technician
Ohio
Denver
 

This will be common in shops for years to come as working at a chevy, buick, gmc dealer these are atleast done monthly, all the way up to the 6.2 for 2022, ive had failures before the first oil change, bent pushrods, lifters coming apart, sticking, not latching, not unlatching, spinning in their guides, pitted lifter rollers taking out the camshafts on a few of them. mostly been lucky to avoid…

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Doug Owner/Technician
California
Doug
 

Wow Denver all I can say is just Wow :-) I'm sure if some people knew this before purchasing these vehicles they might look elsewhere! Customer research is very important before spending a lot of money on these problematic vehicles. Extended warranties are a must! Thank you, Doug.

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Doug Owner/Technician
California
Doug Update
 

Well I finally am able to get back to the vehicle, customer needed to wait to do the work to fix his lifter problem. I took off the offending valve cover which is on cylinder 7 and It definitely has the stuck lifter from the deactivation sequence. And the customer did say that they have had the oil pressure sensor and screen changed along with supposedly another oil pump a few months back…

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Denver Owner/Technician
Ohio
Denver
 

You won’t know the condition of the camshaft until you remove the lifters and see if the rollers are pitted, and looking down the lifter bore. If seen camshaft lobes wiped out at 8 thousand miles, Some will tick for months and be fine, some a couple days and the camshaft is already damaged… I just pulled apart a 2020 and guess what… all cylinders are now using those AFM lifters just they don’t…

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Robert Technician
Michigan
Robert
 

He needs to look at the camshaft regardless AFM and AFM delete cams are ground different and need replaced with his 16 new lifters also needed with your new camshaft & a regular oil pump should be used and removing the oil pan and plug the psi relief valve that HV oil pump will be like over filled oil pan

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Doug Owner/Technician
California
Doug Resolution
 

Was able to get this lifter unstuck and delete the DOD along with blocking off the oil port.

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