I replaced the pushrod tubes believing them to be the cause of the presistent oil leak only to find oil continued to leak. The acknowledged expert in engines in this part of the world says the oil leak is coming from a variety of sources caused by blowby because they didn't use new cylinders in the overhaul and the cylinders and cylinder wall is rusted causing excess pressure in the crankcase. He recommends new cylinders which will reduce the leak but may not completely eliminate it. A mechanic I spoke to at the type tent at Oshkosh advised to use ECI titanium cylinders and a new stainless exhaust manifold and thinks that will cure virtually all of the oil leak. I would appreciate hearing from folks who have had a similar problem before I start down the road of a $5000 investment.
Mac McMahon N94184 VKX Friendly, MD
