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my temp senders [water and oil] are 1/8" npt and
come with brass adapters for fitting them to 1/4 , 3/8, and 1/2" npt
holes. they have no where to put a wrench on them, just threads 100% on
both the inside and out. I brushed some Teflon sealer on them. the
only way to tighten the outer threaded bushing is by wrenching the inner
sender. I hope this will work but was curious as to what others
did. putting a wrench or pliers to the adapter will damage the outer
threads, yet I assume these must work or VDO wouldn't use them,
right?
ps - I drilled and tapped my water pump housing
to 1/4"npt.
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