Pulled off the highway (after driving ~80 miles in 95* heat trying to get my truck to pass emissions.. which it still hasn't) and nailed it a bit... Bad idea. :banghead:

Sounds like someone took a jackhammer to the block anywhere over 3k RPM. Came home ASAP, luckily I was only 5 minutes away, and popped the hood in the driveway and I see smoke. Didn't even bother looking at anything else, I just came inside and been scouring the forums that I'm on for the last 2 hours to see if there's any similar threads. Think I lost a piston, still not sure. I'll be back with more info. Going to take a look at it now.

 

Considering the situation with you cruising i'd say it was detonation. And the only reason it is still together is it only busted out the ring land which is common. A busted ring land will sound like a jackhammer. But so does a spun rod brg. A compression check would rule one or the other out but why bother, it has to come out anyway.

 

So here's what I'm being told so far on 4 separate forums:

- Spun rod bearing
- Piston
- Blown head gasket
- Rocker arm
- Pushrod
- Valve spring
- Busted ring land

 

ROCKER ARM WOULD BE PRETTY DAMN NOISY ALL THE TIME.... WHAT DID THEY MEAN BY PUSH ROD??? LIKE BENT??

BLOWN HEAD GASKET... POSSIBLE... DID IT OVERHEAT??


I WOULD LEAN TOWARD ROD BEARING OR RING LAND...


EITHER TAT OR TEAR INTO HER AND FIND OUT FOR SURE

 

Your guess is as good as mine.

Didn't overheat.

Working on that now..

 

damn really sucks do you have alot done to your 5.3?

 

Stock except for HPTuners.

 

bro that sux!!!

but on a side note will the construction ( Under Construction - Fully Forged 408 ) now become priority!!!!!

 

Just put that there...

 

i feel you pain - i lost my 6L a month ago....but good news is my 383 is getting started!!