Frank,
I'm in the fitting business, so here is my little primer. Tapered threads
are meant to seal on the threads themselves, but must have sealing tape or
"sealer goop" on them to do so. Straight threads are NOT supposed to seal
on the threads, they must have either a metal washer, an o-ring, or a
specific metal-to-metal interference seal. If this adaptor was made
correctly it should have one of those methods designed into it. A copper
washer is a reasonable attempt at a solution, I prefer o-ring seals but
only where temperature allows, and the fitting was designed for it. The
Teflon goop on the threads may keep the fitting from galling, but it won't
make a permanent reliable seal on straight threads. You trust a washer on
the straight threads holding all that oil in your oil pan, so it is worth
a try.
I know it is a desperate measure, but if there were instructions with the
adaptor, now might be the time to read them ;)
Michael
"Frank P. Marrone" <itswonderful@comcast.net>
Sent by: owner-tigers@autox.team.net
02/26/2005 10:33 PM
Please respond to
"Frank P. Marrone" <itswonderful@comcast.net>
To
"Tiger List \(Tiger List\)" <tigers@autox.team.net>
cc
Subject
Leaky Knock Sensor
Hi,
Tomorrow looks like it will be the day I start the Tiger. Tonight I
installed the fluids and everything went well except I found that the
knock
sensor leaks where it screws into the pipe thread adaptor at the water
jacket port. The stud on the knock sensor is a very coarse threaded 3/8"
affair. The sensor came with an adaptor to pipe thread for the block
bosses. I was a little concerned about a leak developing between the
straight thread sensor stud and the adaptor and sure enough.
Anyhow, my first impression is to relocate the sensor to a blind boss on
the
other side of the engine. However, since everything is already wired for
the current location I'd like to take one more shot at sealing this thing.
I'm thinking of finding a copper or aluminum washer to go between the
adaptor and the sensor and then use a thick coat of Teflon sealer goop on
the threads. Do you think this will work? Any better ideas?
Thanks!
Frank
B9471116
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