I am new to the old tractors, I have a 1947 2N that has been over heating. Started with a squeaking from what I assumed was the water pump after running for about 10 minutes, then would overheat after that and sometimes coolant would flow out from under the cap. Changed out the water pump, still squeaks and still over heats. Would my next option be the thermostat? why would the new water pump be squeaking? Fan belt is in good shape, fairly new. no squeak from the alternator.
- Thread starter BBeninati
- Start date
If you do not have the fan belt as tight as it should be it will squeak. As for is it really over heating or are you filling the radiator to full?? You need just enough coolant to cover the fins in the radiator not so full as to be all the way to the top or it will puke out some coolant due to expansion
Janicholson
Well-known Member
The Fan belt might be squeaking. With it full of Water, run it while looking in the radiator neck with the cap off. If there is no flow, or very little,
as it gets warmed up, the thermostat may have failed closed, or there might be a flap of rubber radiator hose that has delaminated on the inside, can
stop the flow. Jim
as it gets warmed up, the thermostat may have failed closed, or there might be a flap of rubber radiator hose that has delaminated on the inside, can
stop the flow. Jim
Janicholson
Well-known Member
Good point. Most car owners younger than 50 have never had a car that needed expansion space in the tank. Jim
I will double check the tightness of the belt, naturally I thought I had it tight but did notice the belt does seem to have some vibration under the alternator, not sure if it ever did that before. After the first start up after replacing the pump there was no squeak but now it squeaks right off the bat so a good possibility. Thanks
Rich'sToys
Well-known Member
- Location
- Southern MN
Not sure what your particular problem is, but just as an aside:
Troubleshooting 101--check the simple stuff first.
I might have replaced the thermostat first-THEN the water pump and/or the radiator! :wink:
I've fallen into that trap myself, but it's a good thing to keep in mind.
Troubleshooting 101--check the simple stuff first.
I might have replaced the thermostat first-THEN the water pump and/or the radiator! :wink:
I've fallen into that trap myself, but it's a good thing to keep in mind.
Steve@Advance
Well-known Member
If you suspect the squeaking is from the belt, take the belt off and start it, just long enough to listen for the squeak.
Also look at the bottom of the water pump and crank pulley. If the pulleys are shiny in the bottom of the groove, the belt is too narrow and riding on the bottom instead of griping the sides as it should. The belt may have been changed to accommodate the alternator pulley width, may need a wider alt pulley and belt.
Back to the overheating... Is the front of the radiator clear of grass? Good airflow through the radiator, and is the air hot? If the air is cold, there is poor circulation. Clogged core, thermostat (if equipped). Could have a head gasket leaking. Look for mysterious coolant loss, blowing coolant out even before the engine gets hot, steam out the exhaust even when warm, water condensation on the bottom of the oil cap, inside the dipstick tube, or bottom of the breather tube.
Also look at the bottom of the water pump and crank pulley. If the pulleys are shiny in the bottom of the groove, the belt is too narrow and riding on the bottom instead of griping the sides as it should. The belt may have been changed to accommodate the alternator pulley width, may need a wider alt pulley and belt.
Back to the overheating... Is the front of the radiator clear of grass? Good airflow through the radiator, and is the air hot? If the air is cold, there is poor circulation. Clogged core, thermostat (if equipped). Could have a head gasket leaking. Look for mysterious coolant loss, blowing coolant out even before the engine gets hot, steam out the exhaust even when warm, water condensation on the bottom of the oil cap, inside the dipstick tube, or bottom of the breather tube.
s soon as you said, "alternator", I expect same as Steve, "Also look at the bottom of the water pump and crank pulley. If the pulleys are shiny in the bottom of the groove, the belt is too narrow and riding on the bottom instead of griping the sides as it should. The belt may have been changed to accommodate the alternator pulley width, may need a wider alt pulley and belt. "
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