Oil on cooling fins

pasophist · Post by **pasophist** » Sun Mar 05, 2006 3:53 am

Hi Guys. I found one of those little black miniature pucks on my garage floor with a dollop of oil on it. I discovered then that the "puck" is supposed to reside between the fins on the cylinder heads- presumably to stop them from vibrating. On close examination, I found oil on several of the fins, notably close to the spark plug location. But I have not been able to locate a source of the oil. Any ideas?

Thanks in advance. Perhaps copy replies to smseigel@shaw.ca

cagiva905 · Post by **cagiva905** » Sun Mar 05, 2006 8:52 am

If we are talking about the rear cylinder, on 900 heads there is a small blindplug just behind the spark plug hole. This blind plug often is a small cause of oil leakage.

perhaps this plug is also on 750 heads?

Michiel

pasophist · Post by **pasophist** » Sun Mar 05, 2006 8:02 pm

Thanks Michiel. There is a small screw on the aft cylinder near the spark plug. That could be the cause of the leak. Is that what you are calling a "blindplug" What is it for?

Sms

DesmoDog · Post by **DesmoDog** » Mon Mar 06, 2006 3:35 am

If it's what I'm thinking of, it blanks off an oil passageway that is machined in after the head is cast. As in they drill a hole to allow oil to flow in the head, and then cap the end so it doesn't leak.. which it ends up doing anyway...

pasophist · Post by **pasophist** » Mon Mar 06, 2006 4:49 am

That would be it. Thanks