I have a Gen1 with the 3.0 and my Oil Pressure Gauge shows only about 20# at highway speeds and near 0# while idling.

Hummmm....that doesn't seem like a good thing! My engine seems to run fine. Except for a sticky valve lash adjuster that is intermitent, there is no mechanical indication that it is stressed or over heating in any way.

But before I start pulling the engine to replace the oil pump and/or measure bearing tolerances for wear (yes it has a bunch of miles on it), I thought I would connect one of my after market oil pressure gauges up and have a 2nd reading to verify the pressure is actually low (not just a faulty gauge). I already replaced the send unit (no change).

Here is the issue: All my gauges are US Meas. (likely pipe thread) close but not correct for the oil pressure port.

Can anyone point me to a source for a metric adapter. Tried a good hardware store and auto parts store. No GOT!

Thanks

You need a BSPT to NPT adapter. Autometer carries them.

My oil pressure on my 3.5 dohc is around 12 psi at hot idle and about 60 psi around 3000 rpms.

Or just use an 1/8"npt tap to ream the BSPT threads a touch so the NPT sender threads will start. It's a tpaer thread and the pitch is VERY close, so your new BSPT sender will still fit. Or you could get an NPT die and turn the taper on the npt fitting down a tad for the same effect. It's how I fitted my autometer fitting on the 2.6T.

Hans & Fasteddy,

Both good tips for me!

I knew the fit was close but you can't get the threads started as you have said Fasteddy!

Thanks!