tashspop

iTrader: (1)

like what type of angles? there is nothing on the cc of the head but build up carbon, i'm waiting on a spring compressor to pull valve to see if its bent/damaged. i can try more pics but idk if it'll show anything. my collapsed lifter was on a different cylinder.

TXsilverado

iTrader: (19)

a bent valve woulndt create damage the size of that gouge. if it did, you wouldnt need a spring compressor to tell.

tashspop

iTrader: (1)

TXsilverado

iTrader: (19)

someone assembling that enigne accidentally left a can of copenhagen in that cylinder. that badass lsx chewed it up and sent it out the exhaust valve. the can left it's mark though.

my story, and i'm sticking to it.

tashspop

iTrader: (1)

i can feel a grove in the cylinder about the 10'o clock position deep in there, but it feels smooth like its been worked before. im not sure if its deep enough to not be an issue. like i said there is alot of carbon on the heads, i've whiped some off the pistons.

Vortec350ss

iTrader: (20)

Its a bunch of contact marks and the individual grooves look slightly smaller then the whole circle... 2" diameter exactly perhaps? It almost looks like this motor dropped a valve and then the guy reused the piston...

Is it possible it only chunked the piston, maybe ruined a head, but the cyl walls were untouched and the previous owner replaced the damaged head and sold the engine? Maybe it happened at really low RPM?

I dunno... its a long shot but its all I can come up with.

tashspop

iTrader: (1)

thats pretty close to what i'm thinking also. this looks like old damage and unrelated to my issues i think. soooo........

do you guys advise me to look into spending way too much here OR maybe replace just that piston or use it, new rings all around, rod bearings, lifters and springs?

1FastBrick

iTrader: (17)

Where did you get that engine??? It's definitely been apart and someone worked on that cylinder.

I would be concerned that it's out of round and that you don't have a good fit in that hole.

tashspop

iTrader: (1)

Motor was in truck already. Yes it was worked over. PO told me its been punched .020 over. Pistons confirm that. They're sealpower .50mm which model number confirms the 20 over bore

tashspop

iTrader: (1)

anybody know where i can find a head gasket being 20 over. i've seen a couple of ls2 gaskets with 4.02 bore but at .054 thick. i wouldn't mind going tighter.