MC with really low compression

Huw Powell
Mon, 07 May 2001 17:56:58 -0700

ed armstrong wrote:
> Thanks.
> I thought handcranking the pistons might be the "X"
> factor in this test. Obviously I can't match the speed
> or intensity of the starter.
> Is there another vote out there that handcranking is a
> no-no for compression tests??

Yes, I will second the motion.  If you watch the gauge while running a
10-rev test, the needle goes higher and higher with each of the first
few rotations.  I think it also makes a difference if the engine is
still hot and if the rings are "wet" with oil.

Huw Powell