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Farmall & IHC Tractors Discussion Forum

Radiator boiling over?

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Zachary Hoyt

05-26-2010 15:53:05

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I hooked my H up to the haybine and it pulls it fine, but after once around the field (maybe 10 minutes, our fields are not that big) coolant blows out from under the radiator cap even though the temp gauge is only showing 150-160. The gauge and cap are new and the cap has 7# stamped in it. The coolant looks foamy and white on top, like when you get foam on maple sap that is boiling. I am wondering if that means I have a blocked radiator, an exhaust leak into the cooling system or something worse that I haven't even thought of. Any advice will be very much appreciated. Tomorrow I'm going to put those new PTO seals on, thanks for all of the help.

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05-26-2010 17:30:18

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 Re: Radiator boiling over? in reply to Zachary Hoyt, 05-26-2010 15:53:05  
NAPA has combustion leak detector kits to check just that issue. If it is not leaking combustion, it might just be over full! It must be about 1-3/4 to 2" below the cap seat! Jim

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Chuck NH

05-26-2010 17:10:51

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 Re: Radiator boiling over? in reply to Zachary Hoyt, 05-26-2010 15:53:05  
A good inferred thermometer can be bought for $60 to $90 from most auto parts stores and makes an excellent diagnostic tool for cooling issues. Don't count on your tractor guage to read correctly. Measure the coolant temp at regulator and top of tank (should be similar) and then measure at bottom radiator return (should be 30 to 40% cooler than inlet). If little difference in temperature, the radiator may be plugged, the waterpump is not moving the coolant, or the thermostat may be stuck closed. I have an H that had a waterpump failure. The the shaft broke loose from the impeller, then the shaft moved forward until disconnecting from the drive pins.

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05-26-2010 16:24:44

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 Re: Radiator boiling over? in reply to Zachary Hoyt, 05-26-2010 15:53:05  
sounds like compression getting into the coolant. possible cracked head, or gskt.when you start it can you see any bubbles in the rad.

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