Oil Pressure......

[Dave81]

All,

What is the connection size of the stock oil pressure light on the rear of a SB Mopar?

Id like to hook up my oil pressure gauge and retain the oil pressure light, so thought it may be possible by incorporating a threaded tee?

So looking for the size?

Cheers

[Dave999]

i think........

mopar oil fittings 1/8 NPT and 3/8 NPT

the first is about 10 mm diameter so if you undo it and its a tapered pipe fitting of nominally 10 mm you are on the right track

the latter is about 17 mm i don't think my sender is that big

but they used two sizes

NPT national pipe taper and its a US standard

british ones are different thread pitch one thread per inch different just enough to screw it all up

Dave

[Blue]

Yes 1/8" NPT . I do the same but have my tee at the gauge end to avoid clutter making it even harder getting at the distributor lock bolt. I use -3 hose as I don't trust that flimsy plastic pipe.

[Dave81]

Thanks Chaps.

Have you any pictures of your install Blue?

After ive sorted the Trans i'm going to have to bite the bullit and rewire the car.
I want the engine bay to have as little wiring as possible, so having the connection inside tha cabin is a good shout!!

Do you need to draw any oil up the line to get the correct pressure reading, or should it 'auto pirme'?

Cheers!!!!

[Blue]

I'll see what I can do Dave, Gauges are out of the Valiant and I'm in the middle of sorting the Barracuda but I should be able to show you something. No need to prime pressure gauges.

[Blue]

Here you go, Valiant has the small sender to operate a light, Barracuda needs the big canister to operate the gauge in the rallye dash. Both only seem to work correctly if they are upright which is odd as I would imagine they are spring loaded, so bit more difficult to do. The gauge in the dash isn't up to much which is why I wanted a proper gauge, I can't do with stuff not working though so had to go this route.

[lough3969]

This is a good idea...

[Dave81]

Cheers blue.

Have you used a straight 1/8" NPT tee to do that or are the ports different sizes?

[Blue]

All 1/8" NPT.

[John]

Here you go, Valiant has the small sender to operate a light, Barracuda needs the big canister to operate the gauge in the rallye dash. Both only seem to work correctly if they are upright which is odd as I would imagine they are spring loaded, so bit more difficult to do. The gauge in the dash isn't up to much which is why I wanted a proper gauge, I can't do with stuff not working though so had to go this route.

That looks very heavy John

[Blue]

Don't worry extreme measures have been taken elsewhere to offset it...