There is also an oil gallery on the left side with a set screw plug in it that sometimes leaks.
Kevin1 --- In [email protected], William R. Bayne <ercog...@...> wrote: > > > Hi Darick, > > I recently saw a coupe fly that had been "in restoration" some 22+ > years. Just beforehand it had received a "major" field overhaul, and > the crank was turned. Even with the most careful replacement (twice) > with "fresh" and soft seals, a leak exists that may well require engine > disassembly and machining of the crank AGAIN! In the process of > replacement it became obvious that the machine shop that turned the > crank completely ignored concentric grooves worn into it (likely from > earlier front oil seals ignored long enough to retain grit blown into > them). > > Another "up front" leak that really "gets around" is from a hole in the > side if the fuel pump. I seem to recall the purpose of that hole is to > alert the owner/pilot of diaphragm failure in the fuel pump. Also > check that the oil breather elbow is tight in the crankcase and there > is no hole in the breather hose up high (which will get amazing > distribution). > > Regards, > > WRB > > -- > > On May 30, 2010, at 23:40, c.d.gu...@... wrote: > > > > > > > Group, > > After I got the ECI Titan cylinders put on, I noticed a new oil leak. > > After a flight I notice the inside top and left of the front cowling > > is wet with oil. The is the area below the cylinder head air intake > > hole. It seems the oil may be coming from somewhere at the front of > > the engine, then blown only to the left side of the front cowling. > > > > The small cover plate at the front of the engine, directly behind the > > prop, which I think is the accessory port for a vacuum pump, is also > > wet, but only at the back. You have to insert your hand and blindly > > feel for this. There is no oil dripping or collecting at the four > > studs holding this plate on. We have retightened these four nuts once > > to be sure the gasket is making a good seal and used Parker > > Stat-0-Seal and Thread Seals (commonly referred to as washer seals or > > self sealing washers) to eliminate a leak path around these four > > studs. The Stat-O-Seals and Thread Seals were not used initially, > > only a white silicone type of sealant from a tube which was "smuched" > > on during assembly. The Stat-O-Seals and Thread seals helped quite > > bit and I thought the problem was solved, but it just took longer to > > show itself. > > > > A new seal was put on the prop shaft where it exits the engine case > > when the new cylinders were installed. > > > > Any ideas where the oil may be coming from? Should we still suspect > > the gasket on the accessory plate or is there another common place for > > an oil leak up front? > > > > Thanks, > > Darick >
