I had some free time so i started taking the lq9 out yesterday. I hit a couple roadblocks so i finished it up today. The crank was frozen solid, we couldnt get the torque converter bolts out so we had to drop the front diff followed by the oil pan it was a pita to try free up the crank so it would spin. Here is where we got the oil pan off and we found this ......







i knew it was looking bad after this. nto to mention i was hoping on possibly salvaging the heads but no they are paperweights .(ugly ones at that) i couldnt beleive how bad my motor was. i was just laughing the whole time as pieces of metal came off everytime we would move it. i think the only thing that may be able to used again is the oil pan and that is going to take alot of cleaning just to get all of the metal out of it.

here is a side shot of the block



and here are the rest.












pretty nice. this all happened withing a matter of 2-3 seconds , we were runnign about 10 psi and 17 degrees of timing, this happened at 5000 rpms off a launch in first gear the afr was almost dead on @ 11.8 . i would have been alot more pissed if it were a rod bolt that failed because i probably could have prevented that. I just hope this to be a learnign lesson. Hopefully many will see more than 10 psi on a stock lq9 isnt a wise idea. i really wish i would have finished my other motor before i completly destroyed this one. but oh well **** happens.

 

Its not supposed to look like that?

 

that's insane....

 

why do cylinders 7 and 8 always fail first?

 

Little JB Weld and you'll be good as new

 

Because they get the most air flow due to being the last two runners at the end of the intake leaning those two cylinders out promoting detonation.

 

Are both heads screwed up? If one isn't bad I might be intrested.

 

one of them may be ok but i kind of boubt it. im going to take it to my engine builder tommorrow. if its ok ill let you know.

 

does i look like this could have been a lean condition , my afr was pretty dam good but i know it doesent know if one cylinder is lean. id expect a burned hole in the piston if that cylinder was lean this looks more like a rod failure.any ideas?

 

that is perty pawpaw