I had a similar problem after purchasing my coupe...used a lot oil, maybe 1/2 quart per hour....what a mess. My mechanic checked and fixed all the usual places noted by others who have responded on this topic. It helped a little bit but it still used a lot of oil.
Many people said the telltale evidence of blowby was dirty looking oil after only an hour or two of flying after an oil change. So my mechanic pulled the cylinders off and found pits in all the cylinder walls. The logs showed only 10 hours in 10 years, all of which was short trips, obviously resulting in rusting from non-use. I keep my coupe at a grass runway airport which limits regular flying during the winter months, so I opted for the ECI Titan cylinders. Since installation and about 12 hours running time, it's only used slightly over a quart. Needless to say, I'm very pleased. If you can't fly frequently and have the money for the new cylinders, I'd highly recommend them. Darick 415C York, Pa. ----- Original Message ----- From: "pilotmac818" <[email protected]> To: [email protected] Sent: Tuesday, August 3, 2010 9:00:57 AM Subject: [ercoupe-tech] Oil leak from "blowby" 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
