piston and block ????

Reply Subscribe

Thread Tools

Search this Thread

Jun 26, 2007 | 03:47 PM

stdjsw311

Thread Starter

TECH Regular

iTrader: (10)

Joined: Jul 2005

Posts: 416

Likes: 0

From: Huntsville, TX

piston and block ????

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???

Jun 26, 2007 | 04:47 PM

GuitsBoy

TECH Senior Member

iTrader: (4)

Joined: Apr 2003

Posts: 6,249

Likes: 3

From: Long Island, NY

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.

Jun 26, 2007 | 07:02 PM

ROCNDAV

TECH Junkie

iTrader: (100)

Joined: Mar 2004

Posts: 3,725

Likes: 2

From: Pasadena, CA

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

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

Jun 26, 2007 | 08:12 PM

67Ranger

TECH Enthusiast

iTrader: (16)

Joined: Aug 2005

Posts: 655

Likes: 0

From: San Antonio, TX

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.

Jun 28, 2007 | 09:18 AM

stdjsw311

Thread Starter

TECH Regular

iTrader: (10)

Joined: Jul 2005

Posts: 416

Likes: 0

From: Huntsville, TX

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.