MOST cooling system problems fall into two categories: lack of flow, and leaks.
Lack of flow can be from a bad water pump impeller, slipping belt, low coolant level, blocked coolant passages in the block or head[s], faulty thermostat, or collapsed hose[s]. Lack of airflow through the radiator can also be a cause of overheating, as well as blocked tubes/insufficient capacity of the radiator causing insufficient coolant flow.
Leaks can be external, as in coolant leaking FROM the cooling sstem. Leaks can also be internal, as in combustion gases leaking INTO the cooling system via a bad head gasket or a cracked head or block.
So take the information I've given you...then apply the information you already know to eliminate some of the POTENTIAL causes of overheating. What's left, then, are the POSSIBLE explanations for your problem. Long-distance diagnosis being an inexact science at best, I wish you well in your attempt at finding the cause and solving the problem.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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