See 3

Took the C3 out for an hour to get the moisture out of the exhaust system. I had noticed last Sunday on the 15 mile trip to see an emergency at the office that the oil pressure was only reading about 20, and it has been around 30 in the past. Oil level was okay so I figured it was either the gauge or sending unit going bad. Today it was reading 25 to 30 for the entire trip. Arriving home I decided to check the oil and transmission fluid level again, and discovered an obvious oil leak. Can't find the right page to picture this in any of the manuals I have on hand. Is this the Oil Pressure Sending Unit? It's still too hot for me to get a wrench on it to see if it's just loose.

Haggisbash

Yes that is the fitting for the pipe that goes to your pressure gauge, its a brass fitting and the pipe is plastic so be careful and don't over tighten it.

'75

You have a manual oil pressure gauge, that is the line going to it,

Oops, didn't type fast enough.

Alan 71

Hi S3,
Depending on what year your car is this might be an example of the type of compression fitting that was quite typical for use on 68-72+ small block engine oil gauge lines.
You'll typically need 2 very small wrenches to tighten the connection.

Regards,
Alan

This is a 71.

See 3

Thanx Haggisbash, '75 and Alan. Yes it's a 72' and it looks to be a brass compression fitting. Hopefully it's just loose and not needing to have the tubing trimmed and re-seated, as there is very little slack or excess tubing there to work with...........

'75

A replacement line might be in order if it's original, just be glad it didn't leak inside the car, makes a mess of the carpet.

Alan 71

Hi S3,
Here's a photo showing the tiny fitting that pushed into the line itself.
Regards,
Alan

HeadsU.P.

The one thing about copper tubing is you don't have to worry about it getting hot, brittle and cracking.

If you can not get access to the fitting, you can always pull the dizzy out of the way.

drwet

Is there anything you DON'T have a photo of?

See 3

Today I gave the fitting on the engine block itself about a half of a full turn with a 7/16" wrench and the fitting on the sensor tubing about three quarters of a turn with a 3/8" and after running the engine for an hour or so it looks to be dry. Thanx for the input guys....

lvmyvt76

How about that football team from Florida?????

Big2Bird

Not quite true. Copper will crack because of the vibration.

7T1vette

If that original plastic line can last 40 years, why not install plastic again?? It's easier to work with and copper tubing can get kinked, pinched, broken, too.

Alan 71

Hi,
I believe copper 'work hardens' from vibration as B2B said. The plastic tubing was used on 68-72 (+?) 327/350 engines.
I believe 427/454 engines had a short length of steel tubing that transitioned to the plastic tubing before it went through the firewall.
Regards,
Alan