stdjsw311

iTrader: (10)

ok i have a 2000 z28 stock bottomend with a cam. i pulled the heads off yesterday and the piston is sticking out of the block about 1/16- 1/8th of and inch. should it be sticking out that far and is this normal???

GuitsBoy

iTrader: (4)

No, they usually stick out .005 to .010. If youre serious about 1/16 - 1/8 then something is not right.... or at least not stock.

ROCNDAV

iTrader: (100)

Yeah, my block was decked and my pistons only stuck out about .015".

Also is it only that one piston? check out the others.

67Ranger

iTrader: (16)

That cant be right.... thats at least 0.0625 (1/16 inch). If that were so, your pistons would hit your heads every time the motor turned over, so that wouldnt be physically possible.You should go get a dial indicator and a deck bridge and check it out, and that will probably give you a little more accurate measurement.

stdjsw311

iTrader: (10)

i will take a pic tonight and put it up to show everyone. i broke a valve spring and the valve hit the piston. well, i thought i could just replace the springs and the valves and get the head all worked over again then put it back together and it would work. well, it sounded like i spun a bearing when i put it all back together so i decided to pull it all back apart again and found the piston sticking up that far.

GuitsBoy

iTrader: (4)

My guess is something broke internally. Not sure how it still held togather. Time to really pull **** apart.

BIG BAD BLACKSS

iTrader: (4)

Do the other pistons come up just as far? Or is this one mysteriously trying to jump out and abandon ship?

Beaflag VonRathburg

iTrader: (176)

Sounds like a wrist pin or rod bolt problem. I look forward to seeing the pictures.