No experience with rebuilding the stock guage, but I put a threaded T fitting right under the sending unit and put a mechanical guage as a back up so I know if the stock guage is accurate.

Are you sure it is the gauge and not the sender?

I changed the sending unit recently with no change in the gage reading and tested my oil pressure with a gage on the block and the oil pressure is perfect. That leaves me to assume it's the gage or the wiring. I plan to remove the gage and wire it directly to the sending unit at the block. That should determine if it's the wiring.

We wouldn't love these cars if they functioned like some damn computer riddled modern car that nobody understands, not even the mechanics. I beg your pardon; they are now called service technicians for good reason.

Cheers,

Tom

Any gauge shop should be able to fix it but before you do that, call Wilkinson to see what a new one costs. It might be cheaper to buy a new one. The OEM gauges are not expensive.

I have a nice one on eBay now that I could take off and sell outright.

is it a stock gage?

Yes



== To reply by email, write above this line. ==

New Reply By tomkuester

Oil pressure gage Reply by tomkuester is it a stock gage? [ View Reply ]

The De Tomaso Forums You received this based on your notification settings. You can adjust your settings or unsubscribe anytime.

It looks correct, why are you selling it? Does it work? How much

$100. Yes it works. I have collected many parts over the last 50 years. Was a Lincoln Mercury dealer from 1965 to 2011..



== To reply by email, write above this line. ==

New Reply By tomkuester

Oil pressure gage Reply by tomkuester It looks correct, why are you selling it? Does it work? How much [ View Reply ]

The De Tomaso Forums You received this based on your notification settings. You can adjust your settings or unsubscribe anytime.

I'm going to test mine further. If it doesn't work, and you still have your gage, I'll buy it from you.

Thank you

Looks like an infinite resistance on the sender (open circuit) will give you a LOW oil pressure reading, and a resistance of about 3 - 10 ohms should give a high reading.

….. If you have some resistors laying about!

Seems like the gauge should be easy to test with a couple resistors and a set of clip test leads…

Rocky

A week ago my car suddenly didn’t have any oil pressure anymore but it sounded just fine… I put the wire that’s attached to the sender on ground and I got a full sweep of the needle on the gauge!
So I ordered a new sending unit.. showed up a day later, put it in, fired the engine up and…. No oil pressure!!! WTF.. did same again.. ground, sweep - good… head scratching…

ordered another sender… exchanged sender, started.. nothing again! Very angry 😡! Very confused 🤔

AND AGAIN! Order, exchange, fire up and I got oil pressure….

So for the people who are wondering if I’m still alive and working on my car.. YES! It‘s that kind  of stuff I’m fighting right now (A/C switch and instrument dimmer switch didn’t work anymore over night…) on and on… my anger management class kicked me out because of anger management issues….

don’t assume because something is new that it actually works!!!!

So much trash out there!

That’s interesting, because it seems to be backwards from what the data shows in the chart…. But I know you don’t deal in theoretics, you roll up your sleeves and get right down to it!

Keep up the good work! You’ll get to the end!

@rocky posted:

That’s interesting, because it seems to be backwards from what the data shows in the chart…. But I know you don’t deal in theoretics, you roll up your sleeves and get right down to it!

Keep up the good work! You’ll get to the end!

…. Unless the END gets to me first ⚰️

my test supports your data!!

high resistance = low oil pressure

low resistance ( hold wire from sender on ground = full sweep/full oil pressure

please Rocky … don’t get confused!!! Need somebody I can call when I do not know what to do anymore!! Your are my Rock(y).. 🤪

👍