GM LS 6.2 L86 Failure

[Justsomeguy]

When my lifter failed and ate the cam there was no loss of oil pressure nor did my motor shut off, I was actually about 300 miles away from home and drove it all the way back.

When the lifter fails you will have a slight shake at idle and have a misfire on the cylinder that is bad. In my case the code was PO305 for a cylinder 5 misfire, the last digit represents the cylinder, a PO300 means it is a general misfire the ECM cannot narrow down.

Damn is number 5 even one that shuts off?

 

[attitude]

Damn is number 5 even one that shuts off?

Nope, it didn’t squeak like the AFM lifters do when it went bad either.

 

[Justsomeguy]

Nope, it didn’t squeak like the AFM lifters do when it went bad either.

Yay......I had a slight miss on 5. No codes. I threw cleaner in it and drove the piss out of it. Cleared up. Assumed sticky i jector because that's not one that shuts down. Now you have me thinking....... man I just finished rebuilding my duramax. I do not need another project at the moment.

Any particular disabler recommend?

 

[attitude]

Yay......I had a slight miss on 5. No codes. I threw cleaner in it and drove the piss out of it. Cleared up. Assumed sticky i jector because that's not one that shuts down. Now you have me thinking....... man I just finished rebuilding my duramax. I do not need another project at the moment.

Any particular disabler recommend?

I chased everything down, I even replaced the fuel rails and injectors ($$$) hoping it was a bad injector as they do go bad.

My AFM was disabled in my tune, but you can get a devices that plugs into your OBD2 port that will disable AFM.

 

[76 Hondo]

Random Lifter/pushrod failures and related issues are common on these engines , We look at them almost weekly for my mechanical damage inspection business I believe the lifters themselves are at the heart of it , Often these motors are clean and well maintained , no overheat or lack of lube situations . misfire codes, "jiggle" and "ticking" seem to precursors

Hey I have that same picture
2017 GMC at 103000 oil changes never went pass 5000 miles full synthetic

 

[Justsomeguy]

I chased everything down, I even replaced the fuel rails and injectors ($$$) hoping it was a bad injector as they do go bad.

My AFM was disabled in my tune, but you can get a devices that plugs into your OBD2 port that will disable AFM.

Are thr plug ins pretty much the same? You have range for 200 or some on Amazon for 50 bucks. Lol

 

[attitude]

Are thr plug ins pretty much the same? You have range for 200 or some on Amazon for 50 bucks. Lol

I’m not sure, I’d imagine they all do the same thing. There was a thread on them within the last week or two.

 

[Baja 252]

I'm at 168K on my 2010 GMC 6.2. It has the cold piston slap that sounds horrible when it's cold, but other than that it runs great. Lucky for me a 2010 6.2 isn't an AFM engine.

 

[DarkHorseRacing]

2016 6.2 with 184K miles, knock on wood.

 

[FROGMAN524]

NHTSA to investigate potential for engine failure in nearly 1 million GM trucks, SUVs

Complaints lead NHTSA to examine certain Silverado, GMC Sierra, Chevrolet Tahoe, Suburban, GMC Yukon and Cadillac Escalade trucks and SUVs.

www.freep.com