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New User/AFM 5.3 likely bit dust/ engine swap info help!

ESierra2008

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ESierra2008 Enthusiast

ESierra2008

Posted
Posted

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.

Goes to dealer in AM to confirm, but Im guessing I lost rings in cylinder #6. I realize it could be and AFM problem and stuck lifter as well.

At this point, I don't want to replace a piston in an engine that's had consumption issues for 70,000 miles just to have the rest of the engine blow soon. Oil has gotten low a few times, but was really bad the first time when I didn't know I had to check it constantly.

If the GM repair is more than a $1000 id rather just find a 6.0 to put in it.

So the fun Part: My trans works well, so what non-afm engines can I make work with my transmission? What else would be required for each engine? I've thought of getting and entire 6.0/6.2 engine and transmission/wiring harness and doing that but im sure it would be very expensive. I think I can get a 6.0/non AFM 5.3 from wreckage yard or engine swap for $1000-$1500. I've done a lot of engine work, rebuild a 473 detroit and also the I6 in my old land cruiser, but never anything this new with as many wires or a computer, but Im sure I can figure it out. What do you guys reccomend? SORRY FOR THE LONG POST. Thanks for helping!

shortnugly Enthusiast

shortnugly

Posted
Posted

sorry to hear about your troubles.

 

I would vote for the 6.0. I had a 2001 2500HD with it. Total Beast.

 

Problem is it would pass anything but a gas station. If you're not worried about mileage, no issues.

 

They are plentiful though.

 

Check PainlessWiring for harnesses and great customer support.

 

Post up your progress.

Daryl LBZ Senior Enthusiast

Daryl LBZ

Posted
Posted

Sorry to hear about your engine troubles. My advice, get rid of all the junk AFM related components whether it be a rebuild, different engine etc... No point in having that useless over complicated crap put back in if it's a catastrophic engine failure. Best thing you can do for engine longevity is lose AFM.

 

http://www.texas-speed.com/p-717-dod-afm-delete-kit.aspx

ESierra2008 Enthusiast

ESierra2008

Posted
  • Author
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And you don't think there is metal in the engine from that lifter collapsing or that lifter possibly wearing the cam lobe down? Is the consensus that the cam and lifter could be changed to fix engine or that it will still need rebuilt? The spark plug had oil on it, is this coming from below piston or above in valvetrain?

 

Thanks!

txab Senior Enthusiast

txab

Posted
Posted

Cam and lifters can be replaced without an engine rebuild. Any metal will be in the pan or trapped by the oil filter.

 

What is the verdict from the dealer?

ESierra2008 Enthusiast

ESierra2008

Posted
  • Author
Posted

Dealer says it should have a new engine because metal shavings could have gotten into engine and caused harm. Want $8000 to replace engine. They should have replaced it free under warranty.

txab Senior Enthusiast

txab

Posted
Posted

Find another shop. That's way too much

 

You never have said what the dealer found. You've alluded to just lifter and cam. Plenty of people have replaced just those and moved on without problems

Cowpie Senior Enthusiast

Cowpie

Posted
Posted

Just looking at this from the outside in, if someone were to rebuild a AFM designed 5.3L and make it a non-AFM engine, that would also necessitate using a different ECM, or at least programming, right? No experience whatsoever in dealing with a AFM engine rebuild and avoiding all that stuff, so just trying to get my mind around what all would it take to do something like that, from a hardware standpoint and how that relates to the stock ECM.

Cowpie Senior Enthusiast

Cowpie

Posted
Posted

Cool. At least it is a simple deal like that. Wasn't sure if there would be any issues addressing it that way. Sometimes, with other engines, just turning off or disabling something in the ECM doesn't work because the the event may be disabled, but the ECM still communicates with the devices or sensors. That was my only worry about rebuilding or using a replacement crate engine without AFM related components, that the ECM would still be trying to communicate with something that isn't there. Just my paranoia over the way the OEM's have intertwined things so much.

Colossus Senior Enthusiast

Colossus

Posted
Posted

Glad to hear that!! Glad the dealer stepped up and did the right thing (though I think even charging you the diagnostic fee is a bit lame, I could still be happy with it)

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