I have a 1969 CL350 which has developed a small oil leak at the seam where the upper and lower cases meet at the front of the engine just below the starter. I certainly don't plan to split the cases to fix it, so I was thinking of repairing it externally. Has anybody had luck with this. I've thought of using everything from JB Weld to super glue. I think if I could just get something to wick into the seam it would work. I don't think silicone will work under heat and I don't want something ugly like RTV. Any thoughts?