The Stovebolt Site Forums The Shop Area General Truck Talk Oil pressure gage

Anyone know what size is the fitting on the oil pressure gage for the 3/16 copper tubing on 1950 year model?
I tried using the 1/8 line kit from auto zone but my gage shows no oil pressure. I have plenty oil going to the rockers and when I forgot and left the line on side of block off and turned the pump with my drill it pumped out two quarts of oil before I saw it.
So either the line has to be 3/16 or I have a bad gage.

Put the gauge end of the oil line in a bottle and crank the engine to confirm you're getting oil and that the line isn't stopped up or kinked. If that works find a second gauge from your junk drawer or borrow one from a friend and see if it works?

Mike B

New line so it’s not stopped up, Jim Carter is showing the replacement line as 1/4”, I thought the original line was 3/16”od but can’t confirm it, can’t find where I put it after months recovering from heart surgery

The diameter of the line doesn't matter-- - - - -1/8" to 3/4" will transfer the same pressure. The only difference will be the volume of oil it takes to fill the line. Where are you connecting the pressure line? It should be plumbed directly into the port on the driver's side rear of the engine, down near the oil pan rail. On most engines, the oil filter supply line is teed into the same port with a fitting called a "street tee".
Jerry

It’s connected to the driver side under the manifold where it was connected when the truck was parked several years ago, and it was working then. I’m going to find a universal gage somewhere and hook it up and see what happens. Don’t know why it would go bad just sitting up but I’ll find out one way or the other.

I have an aftermarket gauge cluster and the oil gauge reads fine but the temp gauge reads 20 degrees high. I know one of those nonanswers that I hate.

I would put a gauge right on the fitting that the tubing originates from on the engine. It’s possible the fitting and or block is clogged at that point.

Here is one from Amazon.[LINK]

Joe Allen The standard line is 1/8 the gauge fitting is almost a one time compression ferrell made of steel. If it will turn and unscrew may be able to re-use if it will seal again. In my pile of 60 year old used fittings there are some junkers that have been cut off and will be a turkey-shoot to re-use. I think they're offered in brass by our vendors that will work and are new.

Yea I been thinking I might have to buy one of those mount under dash gage clusters which would be the cheapest option

Here is a picture of mine so I don’t have to rely on the dash mounted gauge.