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no compression?

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Old Sep 23, 2011 | 05:15 PM
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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
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Old Sep 23, 2011 | 05:55 PM
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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?
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Old Sep 23, 2011 | 07:37 PM
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Forget to install the timing chain? Seriously, I've seen blown headgaskets register something!
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Old Sep 28, 2011 | 10:16 AM
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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
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Old Sep 28, 2011 | 10:22 AM
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!st thing is pull all the rocker arms off and then recheck.
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Old Sep 28, 2011 | 10:28 AM
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pushrods too long? cam not installed correctly?
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Old Sep 28, 2011 | 10:29 AM
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How are you spinning it on a stand? Using starter motor?
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Old Sep 28, 2011 | 12:39 PM
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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.
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Old Aug 1, 2013 | 12:36 PM
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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?
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Old Aug 1, 2013 | 02:37 PM
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Originally Posted by chuckd71
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?
Yes it could. If the pushrods are too long the valves won't close. Valves dont close and you get little to no compression.
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Old Aug 1, 2013 | 02:39 PM
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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.
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Old Aug 1, 2013 | 06:25 PM
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If you had a running motor before hand it has to be something you changed that is causing the problem.
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