Hammer Down

So after deciding to put a h22 head on the f22, I pulled the head off the car today and bare with me I am no where near as knowledgeable as some of the members on here. Thats why I came here for an answer. Can you tell me if my sleeves are ok and what would cause the burn marks? I took pics of the worst 2.

Heres a few pics.









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Btw- the block has 9k miles on it since the build. And I can move the pistons about an 1/8 of an inch around the cylinder. I did a compression check before tearing down the motor. All was ok, ranging from 207-210 across.

All input is welcome.

nismo

if those are metal shards on your piston...


well, best way to say it, your fucked.

PJ2

Detonation will normally damage the pistons not the cylinders, that looks like the normal wear caused by the skirt on the piston, the rocking front to back on the rod allows the skirt to contact the sleeve or cylinder. I would have them honed to restore the x pattern.

Hammer Down

NO there were zero metal shards. I wiped out the cylinder with a terry cloth to get the water and oil out. IT looks like metal, but its not.

Just went back out there to look again, no metal. Just shitty looking sleeves.

Hammer Down

Thanks, but why does the skirt ride on the cylinder wall? Anyway to eliminate that?

dirty c

looks to me that its running rich. looks fine

Hammer Down

Can I move it 1/8 of an inch back and forth and be ok ?

dirty c

a 1/8 of an inch is a lot of play.

PJ2

Piston pins too tight maybe, are those full floating pistons? Getting the piston skirts coated with dry lubricant is the only way I know to remedy that. It's not a problem or a faulty engine you have there, they all do that but some more than others.

dirty c

does it smoke or feel like it loses power when it warm?