I have a 1935 M-D W30. When parking it for any length of time, I have been blocking the clutch pedal down as I'm concerned about it sticking to the flywheel. I'm just wondering if doing so is a good idea or if I will create some other problem. Another question is that I've drained the crankcase a couple of times and I've noticed a little water draining before oil which I'm assuming is the sleeve o-rings seeping. Obviously, the proper fix would probably open a giant can of worms. I'm mostly wondering how concerned I should be as long as I keep an eye on it. The tractor currently sits with an empty cooling system as the radiator is leaking at the bottom. The few hours I've had it running has been with water only. When I get around to repairing the radiator, I will obviously want to use antifreeze to help prevent further corrosion and I'm not sure how susceptible these old engines are to contaminated oil. I know more modern engines don't enjoy coolant in the oil for very long.