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Author  [Modern View]

04-04-2017 20:25:28

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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.

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04-05-2017 16:16:56

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 Re: Overheating in reply to Heyseed, 04-04-2017 20:25:28  
Hi, see link for CIH C-146 engine parts.


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04-05-2017 10:05:14

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 Re: Overheating in reply to Heyseed, 04-04-2017 20:25:28  
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.

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04-05-2017 04:04:13

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 Re: Overheating in reply to Heyseed, 04-04-2017 20:25:28  
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.


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04-04-2017 21:53:02

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 Re: Overheating in reply to Heyseed, 04-04-2017 20:25:28  
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

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04-05-2017 05:18:01

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 Re: Overheating in reply to Janicholson, 04-04-2017 21:53:02  
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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

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