Does anyone know if Helicoils are water-tight? I just got my head back from
the machine shop and found that in removing a ported vacuum switch they
broke it flush with the little block. It wasn't their fault because I
couldn't remove it and they had to remove it to do the machine work. I want
to bring it back and ask them to drill out what's left of the ported vacuum
switch and install a Helicoil.
Thanks in advance
Your ported vacuum switch will be pipe thread... something I don't believe
helicoil supplies.... They should be able to remove the remnants of the PVS
without damaging the threads.
FWIW, shit happens... if we send something to a machine shop, we should
strip anything we want to "save" from the casting....
OK... let's go back over this... "without damaging the threads".... Damaged
threads... what a concept.... If the threads are damaged on an NPT
connection, you can bet that there is a very real chance for a leak....
Running a tap in and giving an extra half turn, is often all that is
required to deliver new, undamaged threads. This allows an appropriate
sealer for the metals being joined (and yes, there are times when "no
sealer" is the appropriate sealer) to ensure a leakproof joint....
All the same, do I sound like I need instruction on pipe threads?
No but my post was direct to the thread. You correctly stated it is a NPT,
I simply point out for others, reading what has been posted, that NPT
threads seal by design. Pipe sealers are in reality lubricants that allow
the connection to go far enough the "incline" of the pitched thread to make
the seal. ;)
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