This group continues to rock. Thank you for all the great suggestions to stop the oil leak. The oil tank is part of the problem; replaced perfectly good front crankcase seal so that's not it. Engine guy says boroscope shows significant rust so his suggestion is new cylinders (he would say that wouldn't he?). Measuring crankcase pressure sure sounds like one of the great ideas floated here. Thanks.
Mac McMahon N94184 VKX Friendly, MD --- In [email protected], james ayers <jimmyj...@...> wrote: > > One thing I tried from an old A&P was to purchase some flouresent die put in > the > oil, run it and check for leaks using a black light. Really works. Need > to > change the oil after... > > > > > ________________________________ > From: "iflysmo...@..." <iflysmo...@...> > To: [email protected] > Sent: Tue, August 3, 2010 10:28:15 AM > Subject: [ercoupe-tech] Oil leak from "blowby" > >  > Hey Mac: I am by no means an engine "expert", however, I have fixed a few oil > leaks. The first thing is to clean the engine/compartment very thoroughly. > Then > run the engine one minute at a time examining very closely to determine where > the oil is coming from. If you have lots of leaks, they may show up in the > first > or second minute. Once you determine where they are coming from, then you can > determine the best process to stop the leak. >     Areas to consider (besides the push rod tubes) are front crankcase > seal, > fuel pump, cylinder seals, oil tank, oil tank filler cap, generator and > starter, > tach drive, crankcase joint,  pump drive under crankcase (if your engine > has > the plate) and the crankcase vent tube. One item to check on the crankcase > vent > is that the extension has been added to the vent fitting. Your engine did not > come with one. >     As you can see, there are a lot of areas that can cause oil leaks > besides > the cylinders (and possible high back pressure) and eliminating all of them > should make it easier to decide if new cylinders are required. Another > thing > you might do is go to your local EAA chapter meeting and ask them who they > recommend to stop oil leaks. > Lynn Nelsen >
