What Causes this Piston Damage?
Looks like the cylinders got a lean air/fuel mixture and drove the combustion temps sky high as witnessed by the obvious melting of the electrodes and pistons. Detonation came in as a result and broke the top of the piston above the top ring. As stated by others, injectors, fuel pressure, etc would be the obvious places to look, if the tune was verified. Any way to verify injector pulse in the computer history?
Banned
Joined: Mar 2010
Posts: 334
Likes: 3
I think a sign on the dash sayng ATTENTION when you hear sounds like pistons are about to break into little pieces.......LET OFF THE THROTTLE MORON!!!
This thread is the reason i loan nothing and if the car goes to a shop or dealer NO DRIVES without me...not even a short test(beat the crap outta yer car) drive.
This thread is the reason i loan nothing and if the car goes to a shop or dealer NO DRIVES without me...not even a short test(beat the crap outta yer car) drive.
Last edited by HotSilverBird; Apr 11, 2010 at 09:16 PM.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
nevermind i see it was together for 6 months, might rule out the ring issue unless the engine got hotter than usual, but its hard to believe a n/a motor with forged pistons would see enough detonation to kill pistons like that without you noticing something long before this result.
^^It had to be.
But like said, fuel pump, injector, a **** ton of trash in the fuel system, tune something is up.
Be sure to go over EVERYthing before you get it running and something like this happens again.
But like said, fuel pump, injector, a **** ton of trash in the fuel system, tune something is up.
Be sure to go over EVERYthing before you get it running and something like this happens again.
Thread Starter
TECH Resident
Joined: Dec 2008
Posts: 995
Likes: 0
Tried to pull the tune using my HP Tuners. Engine is already out. Connected the battery and pulled the fuse for fuel pump to prevent fuel going out.
HP could not detect VCM! "Unable to locate VCM".Anyone know what is the issue?
Asked my tuner to e-mail me the file but it will be EFi live file. It was tuned with MAF, so, guess it is not the issue why VCM not recongnized by HP Tuners.
HP could not detect VCM! "Unable to locate VCM".Anyone know what is the issue?
Asked my tuner to e-mail me the file but it will be EFi live file. It was tuned with MAF, so, guess it is not the issue why VCM not recongnized by HP Tuners.
Last edited by Denali08; Apr 11, 2010 at 02:56 PM.
Looks like a friends turbo car in one cylinder, detonation, or extreme lean condition causing it to heat up and melt the pistons and spark plugs, when we got my friends engine apart the piston in his had a very nice sized hole through the side of the piston, looked pretty cool, but shitty at the same time.
I agree with those who say detonation though, check those injectors, I say the pump to just to be sure but if the pump was bad it would be happening to the passenger side as the main fuel line comes to the driver side, even under pressure it would still not have gotten starved for fuel. I could be wrong though.
I agree with those who say detonation though, check those injectors, I say the pump to just to be sure but if the pump was bad it would be happening to the passenger side as the main fuel line comes to the driver side, even under pressure it would still not have gotten starved for fuel. I could be wrong though.
Staging Lane
Joined: May 2009
Posts: 96
Likes: 1
I've seem a similar failure on a supercharged engine before. Cylinder temps got to high and ring ends butt and take out the piston. The fix was simply to run a slightly bigger ring gap, but that was near 20lbs of boost. I'm curious what your end gaps were set at.
i'd agree with detonation. lots of variables though. but DAMN. im guessing you were at WOT when this happened?
