So a few months back, I was looking for an engine for the ole viffer and 2 weeks ago I found one; an 83' 750 engine with 12k on it. Anywho, today the freight company dropped it off at my garage and I got to digging right away to make sure that I wasn't about to replace a shit engine with another of the same.. The engine looks good externally, the valvetrain was spotless with zero cam wear, the coolant was a nice dull green haha, and then there was the oil... it's this disgusting light brown with some spots where it's been sitting so long that it's started to congeal into a jello like substance. I just got done spending the past 2 hours cleaning it up and have to leave for work in a few, but figured I'd ask for some opinions in the mean time. Could it just be due to the 30 year old engine sitting for a while and repeated years of moisture build up that caused it? (There wasn't a starter on it, so the condensation definitely would have had an open door so to speak) I'm a bit concerned as my day job or wrenching cars has taught me that milky oil means a cracked block, leaky head gasket, or a leak somewhere else that's letting coolant into the oil. As I said, the coolant, although not new, was still green and not milky at the slightest. Any ideas appreciated as I'm going to be working on it again as soon as I get home at 6.
The coolant is leaking into the oil. Not the other way round! Change the oil, once or twice,(even if there is no leak, get rid of the moisture in the crankcase, not good for the bearings, etc.) and pressure test the cooling system. That should tell you if you have a leak. Also, you can run the engine, you'll see if it is indeed coolant getting into the oil.
i think it might just be condensation, esp if the coolant looks good...ive left oil drain pans outside and had the same jello like results
