[s-cars] More Positive Crankcase Pressure 101

[mlp qwest]

Ok, maybe this was checked when you say the "... bore & rings look just like
the rest of them ....", but just in case, were you able to check the #2 bore
for dimensions?  Could something be slightly out of round, or "tapered," say
bore diameter slightly bigger at the bottom than the top or something?  Did
the inspection of the valves extend to the cam buckets and followers?  Could
one of those be "hanging" keeping a valve cracked open?

Any possibility of a small crack or casting pinhole in the head going unseen
without a machine shop test?  Why wasn't (or perhaps there was) a leak down
test run?

Mike

~-----Original Message-----
~From: s-car-list On Behalf Of DGraber460 at aol.com
~
~I recently swapped a replacement WX into my 83 URQ
.... Did a compression check and
~found #2 cyl. at 30lbs. compression. Bingo, I thought this was a
~standard ring problem. On dissassembly, #2 bore and its rings look
~just like the rest of them. Valves, stems, seats, and seals all
~look to be identical and non problematic as well.
~Me and 2 other pro mechanics are totally puzzled from the visual
~inspection. No apparent "smoking gun" as to why. The replacement
~WX is running fine with all the same CCV equipment. A machine shop
~inspection might find a ptoblem with #2, but visually it sure
~doesn't look like a severe enough problem to account for 30lb. compression.
~I'm interested in what you find in the end.
~FWIW- I am running 18-19 lbs. (gauge) boost.
~
~Dennis
~Denver
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