Ferguson TO-20, starts and runs good.
No water in oil, and no oil in water. (No loss of coolant, and nothing extra in the crankcase, either.)
No white smoke from the exhaust.
BUT: 1. I checked the radiator to make sure thermostat was opening, and noticed a few bubbles in the radiator.
2. A couple of times, I"ve noticed a very small, intermitttent, external coolant leak on the left side of the head gasket, between cylinder 1 and 2. (Just a few drops.)
I know from reading on the forum that it"s probably a head gasket. (I also know it could be a cracked head or a cracked block.)
1. Should I just go ahead and replace the head gasket? (And of course, check the head and block for cracks.) Or forget it, and run it until something bad happens?
2. Would a compression check tell me anything I don"t already know?
3. Would it be worth trying any of the leak-stopping products? (My local auto parts store likes K-Seal.)