Hi, My name is Bob Hutton and I've just joined the list. I own only a mere
2500TC sedan but aspire to one day get hold of a Stag. Anyhow back to
compression testing.
Todd Sigety wrote
>My test results were as follows, 155, 150, 152, 155, 160 and 115 (ouch).
>I need to double check that last one.
>If the pressure is too high, this indicates carbon build up in the
>cylinder. I do not know what is considered too high (maybe mine?).
>A large variation between two adjacent cylinders could be a bad head
>gasket, if the readings are low, it could be valves or piston rings.
I've recently done my engine up completely using 10 thou oversized pistons and
there is definitely no carbon build-up. I get a compression reading of 180 to
188. Should I be worried? Is that too high? What compression ratio does that
make it? BTW, where I live near Melbourne Australia, we're about 400 ft above
sea level. The engine is running beautifully, but I have to time it at about 2
degrees BTDC to stop knocking.
Appreciate any comments.
Regards,
Bob Hutton
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