Think I blew the head gasket - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-26-2006, 10:30 AM   #11
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What should the pressures read if everything is ok.
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Old 09-26-2006, 12:28 PM   #12
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don't have a service manual on me.

If you are going in that deep, you should purchase one. Probably upward of 100psi
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Old 09-26-2006, 01:31 PM   #13
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EDITED for a big OOPS!!!
Sorry!!!!!

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Old 09-26-2006, 01:39 PM   #14
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WARNING!!!!

Please do NOT buy the gaskets listed in the post above this! They will NOT FIT your car. They are not available in Aluminum frame, nor are they necessary for a Series1. The OEM or Fel-Pro gasket will live a long life.

The intake port spacing is totally different on your car when compared to the gaskets just posted.
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Old 09-26-2006, 01:47 PM   #15
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And on a Series I, you can take the SC and LIM off as one. I've done it.
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Old 09-26-2006, 01:50 PM   #16
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Quote:
Originally Posted by BillBoost37
don't have a service manual on me.

If you are going in that deep, you should purchase one. Probably upward of 100psi

Roughly 150ish we have seen higher reading, but you want to be close to that area.... And you want the lowest reading cylinder to be at least 70% of the highest reading cylinder, No lower than 100Psi

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Old 01-14-2007, 10:39 PM   #17
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This is an old post but heres an update. I replaced the LIM and still have the same problem. After that I replacing that and still have the same problem I parked the car. The next time I went to start the car up it ran like crap. It would barely stay running and I had to two foot it just to get it to move. I kind of sounded like it was back firing but I know that cant happen on a FI car. I didnt do the compresson check yet b/c I have 92 escort that im replacing the motor in right now. What are some other minor things that I can look at, I wish I had more time and better wheather to devote to both cars, but thats another story. Any help would be appreciated.
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Old 01-14-2007, 10:44 PM   #18
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I think you're gonna have to do the compression test.
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Old 01-14-2007, 10:46 PM   #19
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It might well have been the head gasket.
Looks like you will have to tear it down again and remove the heads.
Have the heads checked for cracks while they are off and maybe have the valves reground and check your guides for wear.
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Old 01-14-2007, 10:48 PM   #20
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I still have my doubts. Did you properly install the LIM gaskets? Did you overtorque them and crack them? Did you replace the o-rings between the SC and the LIM?
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