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Hi, Finn....By the time I drilled and tapped the
hole for 1/2 NPT, the remaining wall would be so thin, I was afraid it would
break during the tapping operation. The housing is cast iron, and a pipe
tap is tapered, so it tries to expand the hole while tapping. Not a good
situation when you have thin walls, expecially if those thin walls are cast
iron. Take care. Paul Conner
----- Original Message -----
Sent: Sunday, January 11, 2004 11:11
PM
Subject: [FlyRotary] Re: Success
I curious as to why you didn't simply thread the housing with
1/2" NPT and used the fitting unaltered.
Finn
sqpilot@earthlink wrote:
The second item I had
success with was the 5/8" heater nipple that is a press fit into the engine,
underneath the oil filter. Mine was missing from my engine. I tried to
find a new one, with no success. Finally, Mazdatrix sent a used one, but
when I put a micrometer to it, it was considerably out of round (probably
caused during removal from the casting).
I found at our
local CarQuest auto parts store, a steel 5/8" hose barb to a 1/2" NPT male
fitting. I just put it in a lathe, and turned the 1/2" NPT threaded area
down to 17 mm, or .160 inches. In the picture, you will see the longer
original piece, as well as the new, slightly shorter
nipple.
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