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.
We went to a Windjammers lecture to hear Bill Seifert and I was impressed enough to buy
the book on the spot. I've heard a lot of people talk about ways to improve a boat, but
I've never heard one person suggest so many good ideas that I hadn't considered. Part
of the charm is the specificity of the suggestions. Everyone says you should secure your
floorboards, hatchboards and batteries. Bill shows good suggestions on how to do so.
The suggestions are very practical for the do-it-yourselfer, too. Many show how to
make or adapt inexpensive solutions. Tip #12 on closing the deck blower vents is one
that will pay off for me without ever going offshore. I'll implement that one to
stop the wintertime storms from finding their way belowdecks.
Besides modifications, the book also includes advice for operating offshore, cooking,
boat selection, dealing with bureaucracy, and more.
Bill Seifert has worked at Tartan, TPI, and Alden Yachts. He's a veteran of many
Marion-Bermuda races and now runs his own yacht management company. His tips are
born of experience--not of book-learning--and it shows. He obviously knows his
stuff.
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