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Farmall & IHC Tractors Discussion Forum
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Hercules overheating

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chuck

01-02-2006 12:20:19




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I have a 6 cyl Hercules engine in a IH Payloader. I just got it running a few days ago. It sounds good but smokes ( oil ) pretty constant. Now it has started overheating. There is no flow thru the radiator. I replaced the thermostat even though the old one tested good. The heater hose that crosses from the waterpump to the head warms up 1rst which leads me to believe the pump is moving some coolant. Then as it runs the waterpump starts to get very hot along with the heater hose and block / head. All the while the top and bottom radiator hoses stay cool. There is no visible flow thru the rad. opening. I went as far as taking the water pump apart. The impeller "seems" ok, doesn"t wobble, turns ok and there were no restrictions anywhere. Help. Can the pump be too worn to pull coolant from the Radiator yet circulate thru the crossover hose ok?? I haven"t checked oil pressure yet as the guage is broken but there is leakage when I losen the line. ANY SUGGESTIONS ???? THANKS

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Chuck

01-02-2006 16:23:11




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 Re: Hercules overheating in reply to chuck, 01-02-2006 12:20:19  
There is a drain located on the cast elbow at the bottom of the pump. This comes from the bottom Rad. hose. Coolant flys out of there when the drain is opened. The radiator seems to flow pretty well. I can't understand how the pump can obviously be pushing water thru that heater hose but not up thru the block and head and into the top of the radiator. The radiator stays stone cold top and bottom. I may try removing the thermostat but I've never seen a bad one out of the box besides it was doing the same thing with the old one which tested good. You can tell there is no water flow because once it gets hot and you shut it off for a while it will heat back up in a minute once running again.
I know the oil system carries away alot of the engine heat so I was concerned with poor oil flow but if it was an oiling problem the radiator should still be getting hot and showing some flow. I don't know for sure exactly how hot it is getting but it's uncomfortable to the touch and any grease deposits on the engine start to burn off.

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old

01-02-2006 12:45:41




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 Re: Hercules overheating in reply to chuck, 01-02-2006 12:20:19  
Did you maybe put the thermostat in upside down?? Or maybe your cooling system is clogged up. I'd start by flushing the cooling system. I use vinager to flush all my cooling system, cheaper then the auto parts store stuff and work better.



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El Toro

01-02-2006 12:36:19




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 Re: Hercules overheating in reply to chuck, 01-02-2006 12:20:19  
Have you looked into the radiator to see if it may have blockage over the tubes. I think I would drain the radiator and look for any krud in the coolant. Once you lose the rust inhibitor in your antifreeze it will mess up a radiator.
You may need to have that radiator rodded out to clear the tubes. Hal



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Janicholson

01-02-2006 14:26:30




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 Re: Hercules overheating in reply to El Toro, 01-02-2006 12:36:19  
In addition to whats been said, there is possibly a radiator hose with an internal break. The hose looks fine, but there will be a flap of inner lining that may completely block the flow. (I've seen it twice)and it is not easy to believe in.

With the bottom hose off, the radiator should flow massive amounts through the fill hole. try dumping a bucket of water through to see if it is plugged.

My cheap ideas.
JimN

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El Toro

01-02-2006 14:50:31




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 Re: Hercules overheating in reply to Janicholson, 01-02-2006 14:26:30  
You can find just about anything when you're working on these old machines. Hal



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