ghostws6

I have an ls1 nd just finished putting the motor together nd ran a compression test nd I am getting all 0's where can I start nd what can I do to find the problem and or reason behind this

ZeeOSix

Zero? ... are you sure the gauge is OK? How are you conducting the compression test? Is the throttle body opening up? Is there a rag stuck in the intake?

S10xGN

iTrader: (11)

Forget to install the timing chain? Seriously, I've seen blown headgaskets register something!

ghostws6

Yea zero compression new gaskets nd bolts for everything on a stand finishing thing nd checking before I put it in the car no rags any wear timing chain on in time I'm lost as. All get out

O2Form

!st thing is pull all the rocker arms off and then recheck.

farmington

iTrader: (14)

pushrods too long? cam not installed correctly?

farmington

iTrader: (14)

How are you spinning it on a stand? Using starter motor?

SweetS10V8

iTrader: (4)

Pull a spark plug and put your finger over the hole, that will tell you if you have any comression at all and rule out your gauge working or not.

chuckd71

iTrader: (23)

What ever happened with this? I'm getting zeros across the board as well. Gauge works, so that 's not it. Did a cam swap- bought cam, springs and push rods as a package from EPS- so I'd think they would be right. ? Going to pull a rocker arm off one and see if that makes a difference.
If all the pushrods were too long, would that cause what I am seeing?

mark21742

Yes it could. If the pushrods are too long the valves won't close. Valves dont close and you get little to no compression.

chuckd71

iTrader: (23)

That's kind of what I thought. Guess I need to get a pushrod checker and see exactly what I need. Seems like a simple thing to do.

niscur29

If you had a running motor before hand it has to be something you changed that is causing the problem.