My coupe has suffered from significant engine oil loss. We had not been able to pin point the source as the oil seemed to be every where and concentrated on the belly.
At last years annual I decided to try several things in attempt to stop the leak/s. The first was to remove the the elbow from the oil breather port and add a one inch extension that protruded into the engine. My A&P brazed the short copper tube into the elbow. Next I rerouted the the line from the elbow to the bottom cowl. This is an aluminum tube on my coupe. The line now slopes up and travels back across the cylinder tops and thru the rear baffle. From there it goes almost straight down to vent out the bottom cowling. Part way down I drilled a 1/4 inch hole in the tube to act as a pressure relief in case the moisture inside freezes and blocks the tube. The result is a dramatic decrease in oil loss. I still have a few drops coming out somewhere but nothing like I had. Cessna charges over $100 for the elbow with the extension . It is worth your while to find someone that is skilled at brazing to modify the elbow. Mike @ KDLL
