where would you start to troubleshoot? 

engine rebuilt professionally not long ago. Runs great. gauge seems to work, just very low. sending gauge and oil pump is new. Of course that doesnt mean anything today i know. 

I am thinking change oil and go with a slightly heavier oil. Castol 10-30. Then check. I have another gauge, so i may swap that out just to check. Other than that i am not sure outside buying another pump and sender unit. 

Check with a mechanical gauge.

I agree, check on the side of the block with a mechanical gauge

all my gauge fittings wont fit in the engine block where the oil sender goes. it appears to be m10-1.0 fitting and none of the parts houses or Ace hardware carry them.

can someone confirm the proper fitting or maybe link what adapter is need to test?

 

btw, i put wire to oil sender to hot on battery....gauge went all way over, so i would think the gauge is okay. something else is the issue

Edited January 16, 20232 yr by Wally

The oil pressure senders are notoriously inaccurate. I think thos are british standard; npt should work

1 hour ago, Wally said:

all my gauge fittings wont fit in the engine block where the oil sender goes. it appears to be m10-1.0 fitting and none of the parts houses or Ace hardware carry them.

can someone confirm the proper fitting or maybe link what adapter is need to test?

 

btw, i put wire to oil sender to hot on battery....gauge went all way over, so i would think the gauge is okay. something else is the issue

That's not how the gauge works.

As for an adapter, if you have a mechanical gauge with 1/8 NPT, you need an adapter like this: https://www.amazon.com/Dewhel-Female-Sensor-Adapter-Reducer/dp/B00V5Q6GME and a gauge like this: https://www.amazon.com/dp/B08HRPSJSB

 

Just to put it out there plainly, the block threads are 1/8 BSPT. The adapter needed is the one SteveJ linked to, BSPT male into the block, 1/8 NPT female to thread in common gauge fittings. 

16 hours ago, Patcon said:

The oil pressure senders are notoriously inaccurate. I think thos are british standard; npt should work

I agree…..Most of the oil pressure gauges seem to read low, especially at idle. Unscrew the the oil filler cap on the valve cover when she’s running. You’ll make a mess if she’s got oil pressure.  🤪

Glow shift gauges sells a tee where you can run both the factory sending unit and the manual gauge at the same time. Works great

got this in today

https://www.amazon.com/dp/B00V5Q6GME?psc=1&ref=ppx_yo2ov_dt_b_product_details

it wont fit... i cant understand why unless its a quality control issue with the piece

You aren't giving us much in the way of details here. 

2 hours ago, SteveJ said:

You aren't giving us much in the way of details here. 

the male end wouldn't go into the block where the sender goes. It appears to be regular 1/8th on both ends. I ordered another one by a different company. Maybe i just got a faulty one