Engine alignmenthttp://www.yachtsurvey.com/alignment.htm Subject: Re: Piston Rings direct from manufacturerFrom: "Hess"
The original Atomic Four rings didn't have an oil ring backing spring, but
the replacement Hasting rings
do. It doesn't say in the instructions
included with the Hastings rings, but the oil ring backing spring has to be
installed with the gap in the spring over the slot in the piston at the
bottom of the oil ring land. If you cover the slot with the backing spring
the engine will usually burn oil after a rebuild.
The engine will also sometimes burn oil after a rebuild if the cylinder
bores are not properly deglazed to a hone finish with a 60 degree cross
hatch, or if the valve guides are worn beyond limit and are not replaced
during the engine overhaul. (Oil burning after a ring job is sometimes
attributed to a need for a break-in oil, when it is actually usually caused
by incorrect cylinder deglazing. A break-in oil should not be necessary.)
From: "Hess"
There was a question the other day about the correct grinding finish when
resurfacing a cylinder head or block deck. Universal specifies a cylinder
head surface finish of #125 RMS, which is the same as #112 RA. You can get
the correct finish with a belt sander, a rotary broach, or a surface grinder
if they are properly set up. All 3 tools are used by automotive machine
shops for resurfacing engine components.
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