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compresion test; head gasket or worse?

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Old Mar 20, 2006 | 06:46 PM
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ccjustin's Avatar
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From: Lowell, MA, USA
Default compresion test; head gasket or worse?

the test went as follows, WOT, no dizzy, main relay fuse out, following the manual and such. I got 170psi on #1, 170 on #2, 200 on #3, and 200 on #4. just did a y8 head on y7 block using new y8 gasket. any input would be great.
Thanks
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Old Mar 20, 2006 | 07:11 PM
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From: Grabbing 4th at 9000, Somewhere, here
Default Re: compresion test; head gasket or worse? (ccjustin)

you are OK with those results, but looking to see if you have milk spots in your oil or brown spots in your coolant should tell you more. But those seen like decent results for a comp test on a mini-me.
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Old Mar 20, 2006 | 07:42 PM
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Default Re: compresion test; head gasket or worse? (MotorMouth)

What about the smoke? is it just because of the new gasket? My service manual says that a difference of more than 28psi across the cylinders is bad. Any thoughts?
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Old Mar 21, 2006 | 07:00 PM
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From: Grabbing 4th at 9000, Somewhere, here
Default Re: compresion test; head gasket or worse? (ccjustin)

Sorry read it wrong, that 170-200 gap is pretty big. did you torque down the head studs in the criss-cross pattern?
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Old Mar 21, 2006 | 07:01 PM
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From: Grabbing 4th at 9000, Somewhere, here
Default Re: compresion test; head gasket or worse? (MotorMouth)

also might want to get the head decked or at least check to make sure it is flat all the way across.
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Old Mar 21, 2006 | 08:20 PM
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Default Re: compresion test; head gasket or worse? (ccjustin)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ccjustin &raquo;</TD></TR><TR><TD CLASS="quote">the test went as follows, WOT, no dizzy, main relay fuse out, following the manual and such. I got 170psi on #1, 170 on #2, 200 on #3, and 200 on #4. just did a y8 head on y7 block using new y8 gasket. any input would be great.
Thanks</TD></TR></TABLE>

did you have the head checked out by a machine shop before installing it?
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