Quote:
Originally Posted by 911monty
My theory basically is that one cylinder had recently fired but did not get to exhaust valve open. When the piston reversed, the compression ring lost seal on the piston ring-land and dumped as blowby into the crank case.
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I'm hoping to get back at it this week.
With this working theory, above, I want to do a leakdown test before i begin reassembly, just to be sure I didn't break a ring land or something.
My problem, or question that I'd appreciate some wisdom on, is this: I've always done leakdown tests on a hot motor, with the understanding that a cold motor won't seal anyway. So... I can't warm this motor up.... it isn't running right now. How useful IS a leakdown on a cold motor? And what sort of numbers are acceptable for a motor at 150k miles?
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