5.3 AFM issues
#1
5.3 AFM issues
My 2008 Sierra 1500 5.3 has had oil consumption issues since 50,000 miles. Dealers ran around problem and did bandaid fixes and I had to drive it for work, out of warranty now. 120,000 miles, slight tick the last few days and this morning I'm going to pass this old lady and felt almost a bang or pop, I was almost to work so i limped there, Engine running rough and almost feels like it could die at stop light, Check Engine Light Flashing, Stabilitrak and Traction Control lights came on too. Went into limp home mode. Checked Oil: good. Unhooked battery to reset for awhile: restarted and everything came back. So I took it to Advance auto to check codes, P0306 - #6 cylinder misfire. So I buy a spark plug/ set of spark plug wires, and ignition coil. Old spark plug covered in oil: replaced: no change. Plug wire and coil don't make any difference either. Re-check new spark plug, Oily.
Dealer confirmed no compression in Cylinder 6. Said I need a new Engine. $8000. Any opinions on this? They should have replaced engine before warranty went out, but they danced around it as I racked up miles and added oil each time I got gas...
Would it be possible to just add and AFM/DOD delete kit with a non AFM cam? My guess is #6 lifter is collapsed with possible cam damage. Would this have put enough metal shavings through the motor to ruin it?
Got my first kid coming soon and I do not have $8000 to spare but Im decent with a wrench.
Any chance GM would replace the motor?
Thanks!
Dealer confirmed no compression in Cylinder 6. Said I need a new Engine. $8000. Any opinions on this? They should have replaced engine before warranty went out, but they danced around it as I racked up miles and added oil each time I got gas...
Would it be possible to just add and AFM/DOD delete kit with a non AFM cam? My guess is #6 lifter is collapsed with possible cam damage. Would this have put enough metal shavings through the motor to ruin it?
Got my first kid coming soon and I do not have $8000 to spare but Im decent with a wrench.
Any chance GM would replace the motor?
Thanks!
#3
TECH Apprentice
Join Date: Mar 2014
Location: Midlothian, Texas
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Im really sorry to here that. If talk to delership managment and show them all the times u put in the shop they may help out. If not got to their facebook page and blast em. My friend had a problem with a toyota tacoma thats how he got his problems taken care of out of warranty. Just be carefull what u say. Put all the detales out on the page. GOOD LUCK.
#4
I have an 08 silverado 5.3, I just did the dod delete and replaced the cam to fix my issues. Mine did the same thing other than the oil comsuption, I also didnt check compresson. The engine check light flashed and the stabilitrak light was flashing followed with a loud clanking. In my case a lifter tray failed allowing the lifter to turn sideways and grind down the roller and the cam. I replaced everything and it runs great now. If I were you I would tear it down and look either way it needs to come apart or come out.
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