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Compression Readings

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6SENSE

Member
Joined
Jun 3, 2001
Messages
1,635
Trying to chase down a few problems so decided to go over a few things with the car. Had the exhaust loose and passenger header off so I decided to take out the plugs and do a compression test just to make sure the head gaskets were okay before I went any further.

This is with all plugs out and throttle body open (actually off) :

#1 - 110
#3 - 130
#5 - 115

#2 - 115
#4 - 118
#6 - 120

Looked okay to me, but figured I would get your opinions for a little insurance. What do you guys think?
Thanks.
 
Doesn't look too bad...Actually not bad at all...#1 is just a little low, but nothing too far out...Try squirting a little oil in that cyl and see if the reading comes up any...Basically, you want them all within 10% of the highest reading cyl...You're not that far off...

With everything off, it you have access to a leak-down tester, run a leak-down test on it now and see what you get...
 
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