If anyone can offer thoughts as to what may have happened...I was forced to leave my '48 tarped, outside, (east of Cleveland), for the last 2 weeks to open up some workspace in my garage. It's been cold, (single digits), but the tractor was started every few days just to keep things loose. Last night I had to charge the battery to get it turned over and after starting it, I let it idle for about ten minutes to warm it up good before clearing snow from my driveway with the back-blade. Once it got warm, a very "high pressure" stream of hot coolant suddenly exited out of the back of the radiator cap and shot across the entire tractor, (thankfully I wasn't on it!) After a few seconds, it stopped. I shut the tractor off right away and then when it appeared safe I restarted it to move it back in the heated garage where it sits now. The tractor is kept tuned up and is in generally good shape. I changed the coolant early this past summer and thought that I had the proper ratio of anti-freeze in the system. I'm not sure why this happened but I am almost afraid of it now. *Could the thermostat have stuck shut and caused this to happen? The only other thing I can think of is some degree of blockage in the cooling system due to a freeze from the cold temps?????
(There doesn't appear to be any leaks in the system after all of this happend). *Also, is there supposed to be a nipple and hose on the radiator fill neck, to route overflow from the radiator to the a place other than across the hood? Mine has a hole but that's it, no nipple or hose. Any help or insight would be very much appreciated!
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