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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.
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.
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.
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.
Regards,
Alan
This is a 71.
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...........
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....
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.
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
What's Leaking Now??
