The Ford Barn - View Single Post - Why is oil leaking out of a cylinder head stud/nut?

Pat Martone · 03-13-2012, 07:22 AM

It is definately black-colored oil coming out of that number 10 stud/nut when the engine is running.
There are no other head gasket leaks or weeps that can be seen around the cylinder head.
I have been told by a Model A friend that drove the car for me that it has plenty of power and it sounds very good, but he did notice lots of carbon build-up on the spark plugs and also carbon build-up when peering into the cylinder chambers. All four spark plugs and cylinder chambers looked the same. Although the engine doesn't smoke through the exhaust while it's running, we do see some dry carbon deposits on the floor under the tailpipe on the garage floor.
I was hoping that the previous owner was running the fuel mixture too rich and that was the reason for the carbon build-up in the combustion chambers.
I certainly hope the engine block has not been compromised, as one person has suggested.
What would you recommend as a course of action?
Thank you.

03-13-2012, 07:22 AM	#7
Pat Martone Senior Member Join Date: Jul 2011 Posts: 495	Re: Why is oil leaking out of a cylinder head stud/nut? It is definately black-colored oil coming out of that number 10 stud/nut when the engine is running. There are no other head gasket leaks or weeps that can be seen around the cylinder head. I have been told by a Model A friend that drove the car for me that it has plenty of power and it sounds very good, but he did notice lots of carbon build-up on the spark plugs and also carbon build-up when peering into the cylinder chambers. All four spark plugs and cylinder chambers looked the same. Although the engine doesn't smoke through the exhaust while it's running, we do see some dry carbon deposits on the floor under the tailpipe on the garage floor. I was hoping that the previous owner was running the fuel mixture too rich and that was the reason for the carbon build-up in the combustion chambers. I certainly hope the engine block has not been compromised, as one person has suggested. What would you recommend as a course of action? Thank you.