开云体育

I am looking for an answer from the "odd facts known by few" subgroup.
Just replaced both head gaskets (and water pump) on a used EJ22
engine. The engine is still on a stand in the garage. On a whim I
decided to check the compression in each cylinder while turning the
engine over by hand (20 revolutions of the main pulley). I wasn't
expecting much, there's no oil in the engine, but what I found
surprised me. Cylinders 3 and 4 (cylinders on each side closest to the
front of the van) gave consistent 30 psi readings while cylinders 1
and 2 (the cylinders on each side closest to the rear of the van) did
have compression but not enough to give me a number. My gauge has a
black bar, then a white space, then the first number is 30 psi. The
needle barely moved into the black bar area for cylinders 1 and 2, so
I would guess less than 10 psi. It was enough pressure that I could
press the release button on the gauge and the needle would move back
to 0 and I could hear a hiss. I did not do this test before pulling
the heads off, now I wish I had as this it is this type of data that
will dominate my thoughts on the long lonely roads between here and my
destinations. Any thoughts?