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Overheating

H

Heyseed

Member
I have a 1967 IH 424 gas C-146 four cylinder. It started to overheat and spit water out the radiator cap which never did seal real well. I flushed the radiator, the fins are clean, the belt is tight. With the cap off it will gurgle the coolant out, not like a blown head gasket, just bubbles out. Could it be the thermostat? If it is anyone know the part number? I looked and YT doesn't sell one for this model
Thanks for any help.
a156517.jpg
 
Does it take time to begin doing this, or does it begin as soon as it is started? f right away, it does trend toward a leaking head gasket. If it takes 8 to 10 minutes, it could be a failed water pump, plugged radiator core, trash in the fins, or scale and rust buildup in the block, or blocking flow in the cores. If the first mentioned, use a "combustion gasses in coolant" test kit (autoparts store) cheap and definitive. If it is the latter, a drain and flush with pure vinegar (running till warmed up) then drained and rinsed then filled again with coolant. Jim
 
I had the same happen to my IH 844S tractor. In that case it was a leaking head gasket. Do you get any white smoke from the exhaust? I agree with Jim, a carbon monoxide test kit is the fastest way to check.
SadFarmall
 
It takes a while to start overheating, no oil in the coolant and no water in the oil. I had a blown head gasket on a different vehicle and have seen how that would spray water. I am going to try the vinegar flush.
Thanks again
a156519.jpg
 
Loosen the fan belt & roll the fan/ water pump over by hand & listen
for bad bearing in the pump. Take hold of a fan blade & try to move
it front to back to check for a bad bearing also.

Are you using distilled water along with the anti-freeze??
Water from a dehumidifier will work, & will not have minerals/ lime
in it.
Jim
 
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