- May 23, 2003
I was doing some winter tidying on my 73 roadster and found quite a bit of engine oil in my primary case. This was a bit disconcerting as I'm running a belt drive. Further investigation showed the oil to be coming from between the crank shaft and "oil seal." Also, I use a catch bottle for the crankcase breather hose (no original air filter) and that bottle was pretty full of oil. I'm suspecting excessive pressure in the crankcase is blowing oil out anywhere it can go. Anything other than the pressure relief valve to check?