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Compression test
Topic Started: Feb 27 2012, 07:21 PM (696 Views)
AmericanTrash
Elite Member
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Cylinder 1 2 3
dry 135 120 150
wet 165 150 180
i used 3 teaspoons of 2-cycle oil in each cylinder
what i conclude from this test is that the head gasket must be bad, because while i have low(er) compression, the pressure increased consistantly between all cylinders. Would that be correct?
Also as a side note all my spark plugs had white coated tips, is this the result of coolant being burned?
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z34-5speed
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Formerly "Tech Certified"

How many miles?

Do you have any air in the coolant or oil in the coolant? Doe it overheat? Etc...? My first impression is shot rings, but more info would be good.
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Johnny Mullet
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Fear the Mullet

I would think burnt valves.
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AmericanTrash
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No overheating, haven't checked the coolant, got 118k miles
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Woodie
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3 Teaspoons? Too much, but it doesn't matter at this point. A bad head gasket is not going to cause a problem on all three cylinders. Sounds to me as if it's just stone wore out.

None of this really matters. You either need new rings, new valves, or a new head gasket. There's no sense in doing any one of those without doing it all.
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