I use standard plumber's tape on my tapered threaded fittings.
You have to be careful- it's such a good lube that
you can crack fittings and housings with ease.
But it does help seal and make things easier
to take apart later.
The standard pipe taper requires some form of sealant.
I think you're SUPPOSED to use a proper
pipe sealant- but I've never bothered to go
look for any. None of the plumbing things like oil...
Also, there are a few places (brakes come to mind)
where the strands of teflon could
hurt something if they got loose in the system.
I'm just more careful there.
One idiot's opinion....
-------------- Original message ----------------------
> Hi all.
> While in the process of removing hoses to get at my non-working temp sending
> unit, I notices that the last person (idiot??) to work on this car had used
> Teflon tape on all the threaded coolant connections. Is this something that
> common practice? If so, is it a specific tape for automotive purposes? Or
> I not replace the tape?
> Thanks in advance
> Belleville, WI.