John,
Did you test with a warm engine? Carbs propped open? valves set
properly? If so, try a leakdown test- pressurize each cylinder at TDC,
and listen to where air is escaping. Like the compression test, this
is comparative- you're listening for variations across the engine.
Intake manifold means a leaky intake valve, tailpipe means bad exhaust,
and if you can hear it in the rocker cover, it usually means rings. The
concrete test for rings is to squirt oil into the cylinder, which helps
the rings seal. Oh, yeah, and air getting into the radiator means
trouble! <grin> Been there...
Good luck,
Toby B
> I can not imagine
> more than 3K miles since rebuild. I noticed some blowby with the oil filler
> cap off so I did a compression test. #1 reads 170-175 and the compression
> decreases back to #4 reading about 145. My car idles ok and has pretty
> good power so it could be the tester. If these numbers are real, what
> would cause those low readings? I replaced the rings after doing a honing
> of the cylinders but I dont recall doing a comp test after putting it back
> together.
>
>
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