Posted by Red Dave on July 31, 2012 at 08:58:36 from (66.216.141.163):
In Reply to: overheating/Farmall A posted by gene smith on July 31, 2012 at 08:34:57:
First, make sure that the radiator is full, the thermosyphon cooling system requires that the radiator is full for it to work. Also, if you have circulation, it should be cooling. A small amount of water pushing out the overflow is normal for these tractors.
If you still have overheating problems, there are 4 small passages, about the size of a nickel, that the coolant has to pass through as it rises up through the block. They are beside the cylinder sleeves. If they get blocked, they will impede circulation, and they get blocked easily by rust & scale.
The best way I know of to fix it is to take the radiator off, remove the lower water inlet and flush out the water jacket behind that inlet, making sure that you reach in and push water up through those passages, which are at the top of that water jacket.
Flush up through the water jacket, and down through the upper water outlet. If you can get something in there to poke up through the holes to clear them, that would be good too.
If that doesn't work, you may need to pull the head to flush it.
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