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Old 05-09-2010   #2
Pushit2.0
15min late to the world
Re: leak down test

It sounds like you have a valve seal leak, no big deal. A leak down test will not show if your valve seals are leaking. The valve seat and valve seal are 2 different things. The valve seat is what holds in cylinder pressure and the valve seal holds the oil in the head.

What brand compression gauge and how did you perform the compression test? The numbers sound good, so no alarm there.

A leak down test will show where your cylinder pressure is going. A few common areas are around the rings, past the valve seats intake or exhaust, head gasket, or a hole in the piston.

~John
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Moon taxi: 9.45@156.9 mph 41psi 2011... Letting people down sense 2012.
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