LS1TECH - Camaro and Firebird Forum Discussion
LS1-LS2-LS3-LS6-LS7 PERFORMANCE
Generation III Internal Engine
Engine Compression (Odd Noise)

Generation III Internal Engine 1997-2006 LS1 | LS6

Sponsored by:

Engine Compression (Odd Noise)

Reply Subscribe

Search this Thread

Old

Oct 15, 2007 | 02:21 PM

#1

Thread Starter

Teching In

Joined: Jan 2007

Posts: 26

Likes: 0

From: Fairfax, VA

Exclamation

Engine Compression (Odd Noise)

I'm in the middle of doing my heads/headers/rod bolts swap. I've bolted down the new heads and valve springs...the engine currently has no intake manifold NOR does it have the pushrods or rockers installed.

When i turn the crank pulley i get a hissing sound. Obviously this is air escaping...but SHOULD this be happening? I've never heard it do this before but this is the first time i've done this without the intake and rockers/pushrods installed.

Do i have a compression issue?!

Thanks for all your help!

- Jeff

Old

Oct 15, 2007 | 02:34 PM

#2

TECH Apprentice

iTrader: (4)

Joined: Mar 2004

Posts: 350

Likes: 1

From: Crane, Texas

Default

Is the hissing sound like its coming from the crank case? Most likely its the cylinder pressure bleeding off by the rings and its normal.

Old

Oct 15, 2007 | 02:41 PM

#3

Thread Starter

Teching In

Joined: Jan 2007

Posts: 26

Likes: 0

From: Fairfax, VA

Default

sound seems to be coming from the top end. is that normal?

Old

Oct 15, 2007 | 02:48 PM

#4

TECH Senior Member

iTrader: (23)

Joined: Aug 2005

Posts: 8,797

Likes: 0

From: Watertown, NY

Default

normal

Old

Oct 15, 2007 | 03:34 PM

#5

Thread Starter

Teching In

Joined: Jan 2007

Posts: 26

Likes: 0

From: Fairfax, VA

Default

thanks guys!

just a bit paranoid

still realllly paranoid about the startup after changing rod bearings and rod bolts! but that's a whole other story

again, thanks!

- Jeff

Reply Subscribe

First
Prev
1 / 1
Next
Last

All times are GMT -5. The time now is 11:29 PM.