Generation III Internal Engine 1997-2006 LS1 | LS6
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Excessive Crankcase Pressure, help???

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Old Nov 17, 2004 | 07:30 AM
  #21  
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From: Kansas City, KS
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Originally Posted by Inspector12
That is what mine turned out to be, but I had four bad pistons and the car still ran good. Look at my pictures in my signiture and you will see the ring glands are destroyed. Good luck!
your car ran FINE with the pistons like that??
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Old Nov 17, 2004 | 10:49 AM
  #22  
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From: Pearland
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Yeah I could not believe it either no knock at all even with a Tech 2 it registered no knock LOL! And I mean I ran an 11.7 @125, and that was with a shity 60' time. It blew the dipstick out all the time and puked oil out the breather that I relocated to keep it from geting all over the rest of the motor. But ran fine up until I took it apart to rebuild it etc.
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Old Nov 18, 2004 | 07:55 AM
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Originally Posted by Inspector12
Yeah I could not believe it either no knock at all even with a Tech 2 it registered no knock LOL! And I mean I ran an 11.7 @125, and that was with a shity 60' time. It blew the dipstick out all the time and puked oil out the breather that I relocated to keep it from geting all over the rest of the motor. But ran fine up until I took it apart to rebuild it etc.
holy crap, that is shitty news for me

well, maybe I can get the ls2 block I wanted to build this engine with then...

did you do a leak down or compression test?? I would think both of those would have failed miserably with yours. I'm also wondering if it's possibly one of my valves isn't closing all the way?? wishful thinking, but I'm gussing it would cause the same problem.
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Old Nov 22, 2004 | 05:38 PM
  #24  
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Well I didn't do a leak down or a compression check. The reason is because the only thing it would have told me is whitch cylinders. I had done enough work and exhausted every other option. But you can and I would recomend it to be sure (Although I am sure.). If a valve is staying open etc it will not affect you crank case at all remember that would just cause a possible miss or no compression. When the piston would come back up etc it would just blow/suck it back into the intake or exhaust depending on which valve not the crank case. That is how you know it is a piston issue and not a valve related issue. Good luck hope you figure it out.
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