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Old 08-02-2012, 12:50 PM
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Compression Test

Well, have done multiple compression tests after installing my new performance heads and came up with 155-160 on the drivers side cylinders. On the passenger side I am between 160-170. Should I be worried with the slightly higher compression on the passenger side? Looks like I may have torqued the passenger side down a little too much. What do you guys think? Should I pull the head bolts and put new ones in? If I do that do I have to do the full work up and drain the coolant and buy a new head gasket? Or can I just do them one at a time?
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Old 08-02-2012, 01:32 PM
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Re: Compression Test

if you did torque it too much, then yes you need a new head gasket on that side,changing just the bolts wont un squish the gasket. did you test it after running it a little? if not,maybe the new valves are leaking down a little?
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Old 08-04-2012, 12:39 PM
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Re: Compression Test

Over-torquing a head gasket won't cause that much difference in compression. Probably has more to do with the cam itself. It's not more than 20% difference so i wouldn't worry about it.
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