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

Rich in Tucson · 03-13-2012, 10:39 AM

I am with Brent also. Worked on one with the same symptoms several years ago. Owner insisted on running it rich ("helps keep it cool") and was a habitual overuser of Marvel Mystery Oil. The leaking fluid was clearly carbon and condensed motor oil from cylinders 3 and 4 where several head gasket leaks were clearly evident. He had several loose studs (the leakers) and two with poorly fitting helicoils on which the installation tangs were never removed. Head gasket replacement fixed the motor but not the owner!

03-13-2012, 10:39 AM	#13
Rich in Tucson Senior Member Join Date: May 2010 Location: Tucson, Arizona Posts: 374	Re: Why is oil leaking out of a cylinder head stud/nut? I am with Brent also. Worked on one with the same symptoms several years ago. Owner insisted on running it rich ("helps keep it cool") and was a habitual overuser of Marvel Mystery Oil. The leaking fluid was clearly carbon and condensed motor oil from cylinders 3 and 4 where several head gasket leaks were clearly evident. He had several loose studs (the leakers) and two with poorly fitting helicoils on which the installation tangs were never removed. Head gasket replacement fixed the motor but not the owner!