Yesterday, I was trying to blow all the residue out from the valve
areas using the spark plug hole... oops.. #3 valves were closed and
the piston immediately traveled to the bottom of the bore.. I had
to turn and wiggle it to get it to go back up into the engine. At
that point, I decided I should probably go ahead and remove the
cylinder head and the piston to check the ring orientation..
Once I got the head off, I discovered that the rebuilder decided to re-
use the old head gasket by using that spray copper stuff. Also, all
the pistons were stamped relative to their position in the engine ...
#6 somehow made it into the hole for #1 and vice versa.. The rings
have just a tiny bit of break-in wear on them, so I assume this engine
was run after rebuilding.
Ok, so I started analyzing the cylinder head from the rebuilt
engine.. Turns out there is a tiny hole about 3/4" deep in the top
of #1 combustion chamber. I said to myself "oh great, gotta use the
other head..". I retrieved the head from the original engine and
scraped the carbon out of #1 to discover the same sort of hole!!
Anyone know what's up with that? One head with the hole, I would
have figured, was a defect. However, the same hole in the same place
on two engines that were built around 5 years apart originally is no
Another thing, I think I would like to use the original head anyway...
I measured the thickness of the heads and the head from the original
engine is about .030 shorter than the 'new' head..