On Sep 11, 7:18*pm, jim beam <m...@privacy.net> wrote:
> also, do a common-sense blow-by test on the motor. *with the engine at
> working temp, carefully unscrew the oil filler cap. *if the engine's
> breathing right, and you don't have a compression/wear problem, you'll
> get a bit of chuff out of the hole, [and some oil spray]. *if there's
> something [badly] wrong, either the cap will want to shoot out of your
> hand as you get close to removal, or you can feel some vacuum if you
> have your hand over the hole. *what you /should/ feel is a reasonable
> degree of positive pressure.

Did this test. No shooting of the cap at all, nor any vacuum. With my
hand on the fill hole, there was a pulsing positive pressure--chuffing
as you wrote--and oil spraying/slopping onto my hand.

I gather this is not conclusive but a crude test for seriously bad
compression, right? I expect to get an inexpensive compression tester
soon and see what this yields.