85Bullnose
Registered User
Bought a 7.3 that had, measuring the circumference, about 8 inches of flywheel teeth sheared off, as well as most of the starter drive teeth, which told me that something had the engine virtually locked. Considered cavitation, rod/main bearings, etc. but went ahead and took it, just for accessories and spare parts. So, attempted to rotate engine, and it would only turn about 150 degrees and then stop dead. Decided to remove glow plugs, and after removing just 4 glow plugs, #7, #8, #6 and #2. Some oil came out of #8, but a geyser of oil, that would have made Ol' Faithful proud, shot up out of #2 about 3' high. Now....hold those thoughts....the reason that #2 had so much oil, was because when I first unwrapped this engine, there was oil standing in the intake, about 1/4" to 3/8" deep. This was with the engine sitting reasonably level, from side to side. Afterwards, when I let the engine hoist down, the engine gently rolled to the side, thereby putting #2 cylinder at the lowest point of all the others. So quite naturally, the bulk of the oil would have went to it. So....herein lies the dilemma, obviously since oil is incompressible, this massive amount of oil could not have been caused by blowby. Also possible, is that someone had poured this oil in the intake, in order to free up what they thought, was a frozen piston(s). There is no way to get an accurate reading through a compression test, as it would indicate a false positive, because of oil sealing the rings. I should add that the engine can now be rotated a full 360 degrees with no binding, etc. My only solution is to remove heads, clean oil out of cylinders and reassemble with new head gaskets and retorque head bolts. But I need this compression figure to see what kind of shape it's in. Does anyone have a solution, for removing this oil in cylinders, without a tear down? As always, I apologize for the lengthy story, but I am a firm believer that, "invariably, the devil is always in the details". Thanks in advance to all who reply.