Posted by Janicholson on September 04, 2007 at 06:37:27 from (199.17.6.122):
In Reply to: M overheating posted by tmq on September 03, 2007 at 19:04:23:
I agree with Bob, and will add that if the system is not leaking combustion gasses, here are some specific things to check: 1) flow of coolant. Leave the cap loose and operate the tractor a bit. (Make sure it is not boiling) then open the cap while running and look with a good light into the tank to observe flow of coolant. If it is flowing in eddies and real obvious, there may be ignition timing issues. 2) if the flow is weak or the coolant not warmed up much, there can be several things wrong. New T-stats can be bad (test in a can on the stove with a candy thermometer). The hoses can have internal failure that looks perfect on the outside but is collapsed and restrictive on the inside. Waterpumps can have their impeller loose on the shaft, or with the wrong gap to the housing (way difficult to pinpoint). Head gaskets can be in wrong with misaligned coolant holes. Thermostat can be in backwards (not likely, but possible). And finally there could be a rag or other foreign material in the system. If when it becomes heated to the point that you need to stop, do so then (whth the engine OFF, and in high gear brakes locked) feel the back side of the rad to determine if it is hot all over, or just in sections. Ms are overcooled, and yours has something wrong. Good luck JimN
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