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Overheating

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Gmartin
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PostPosted: Mon Sep 23, 2019 3:17 pm    Post subject: Overheating Reply to specific post Reply with quote

I have an 860 Ford that?s overheating. Radiator is about a year old.
Removed thermostat to see if it made any difference and it did not.
This radiator looses a lot of coolant out the overflow tube. I can fill it
anywhere from full to 2 inches from the top and it starts running out of
the overflow as soon as you start the motor. Nothing leaking from
water pump & water looks like it?s circulating when I look at it when
the radiator cap is off so I?m guessing it?s not the water pump.
Replaced both hoses when radiator was replaced & ?flushed? the
block with garden hose while I was there. Have not tried operating
without the cap but might try that next. Anybody have any
suggestions?
Thanks(in advance),
Gary
 
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Sean in PA
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PostPosted: Mon Sep 23, 2019 3:38 pm    Post subject: Re: Overheating Reply to specific post Reply with quote

Head gasket?
 
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pinball
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PostPosted: Mon Sep 23, 2019 3:45 pm    Post subject: Re: Overheating Reply to specific post Reply with quote

first thing I would do is as soon as I start it feel the radiator top hose. it should take 2/3 minutes for it to start getting solid. if it starts to get solid immediately then you probably have a blown head gasket and if your getting water out the overflow as soon as you start your tractor then it could be that. your water level just needs about an inch of water covering to tubes. it will expand with temp and if you fill it to full it will dump water. what does your water temp guage do when you start it. I just got done with a 961 that had the same problem. I flushed the heck out of it. replaced a freeze plug that started leaking. got a lot of rust out that hole. finally got the temp to hold at 230 which is still to warm but a lot cooler than what I had. I finally determine for sure I didn't have a head gasket problem and ordered a new thermostat and radiator. now she runs around 170 all the time. I do leave the level down some as it still gets a lttle pressurized but doesn't spit out any water. if you are trying to flush your radiator you will have to add something to your water such a mean green ,vinegar, soap and water.etc to help clean it as well as to flush the coils from the outside to make sure you have a good air flow though it. good luck.
 
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Gmartin
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PostPosted: Mon Sep 23, 2019 4:05 pm    Post subject: Re: Overheating Reply to specific post Reply with quote

Not getting water in the crankcase and I don?t think I?m getting oil in
the radiator, so didn?t consider the head gasket. What?s the best way
to check the gasket. Compression test? Seams like I had someone
tell me to spray carb cleaner around the head while it?s running. Ever
hear anything like that?
Thank you.
 
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Gmartin
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PostPosted: Mon Sep 23, 2019 4:12 pm    Post subject: Re: Overheating Reply to specific post Reply with quote

I?ll hope & pray it?s not a head gasket & see if I can find some time to fool with it tomorrow. Thanks for the reply.
 
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Sean in PA
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PostPosted: Tue Sep 24, 2019 6:43 am    Post subject: Re: Overheating Reply to specific post Reply with quote

CVPost-gmartin wrote:
(quoted from post at 20:05:42 09/23/19) Not getting water in the crankcase and I don?t think I?m getting oil in
the radiator, so didn?t consider the head gasket. What?s the best way
to check the gasket. Compression test? Seams like I had someone
tell me to spray carb cleaner around the head while it?s running. Ever
hear anything like that?
Thank you.


carb cleaner around the head or intake manifold will tell you if you have an external leak on the suction side, but not anything about any internal leaks. If you are not getting any oil in the radiator then the pressurized exhaust gasses still could be forcing their way past a bad head gasket and cause pressure in the cooling system. There are actually tests you can perform for testing for exhaust gases in the coolant that would tell you if that is what is happening.

https://itstillruns.com/test-exhaust-gases-coolant-7885485.html
 
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Gmartin
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PostPosted: Tue Sep 24, 2019 9:28 am    Post subject: Re: Overheating Reply to specific post Reply with quote

Thanks Sean in PA. I think I?ll try a compression check first and go from there. I?d really be up the creek if it wasn?t for this board.
 
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showcrop
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PostPosted: Tue Sep 24, 2019 2:11 pm    Post subject: Re: Overheating Reply to specific post Reply with quote


Running out the overflow as soon as it starts running means that your cap is not sealing. Try a new cap.
 
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Gmartin
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PostPosted: Tue Sep 24, 2019 3:42 pm    Post subject: Re: Overheating Reply to specific post Reply with quote

I don?t understand but will give it a try and let you know.
Thanks,
Gary
 
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lonestarjeff
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PostPosted: Tue Sep 24, 2019 4:56 pm    Post subject: Re: Overheating Reply to specific post Reply with quote


Mine had an elusive overheat problem after I did a semi-restoration. If the other suggestions don't find your problem try enriching the carb mixture. I was just running it too lean.
 
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showcrop
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PostPosted: Tue Sep 24, 2019 6:02 pm    Post subject: Re: Overheating Reply to specific post Reply with quote

CVPost-gmartin wrote:
(quoted from post at 16:42:48 09/24/19) I don?t understand but will give it a try and let you know.
Thanks,
Gary


The coolant cannot go out the overflow without pushing past the seal of the cap, which takes pressure, which takes heat. If it is pushing out the overflow as soon as it starts to run without generating pressure, it means that the cap seal is bad.
 
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MarkB_MI
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PostPosted: Wed Sep 25, 2019 2:11 am    Post subject: Re: Overheating Reply to specific post Reply with quote

Sounds like a blown head gasket to me. Not such a terrible job on an 860.
 
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Sean in PA
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PostPosted: Wed Sep 25, 2019 7:11 am    Post subject: Re: Overheating Reply to specific post Reply with quote

showcrop wrote:
(quoted from post at 22:02:05 09/24/19)
CVPost-gmartin wrote:
(quoted from post at 16:42:48 09/24/19) I don?t understand but will give it a try and let you know.
Thanks,
Gary


The coolant cannot go out the overflow without pushing past the seal of the cap, which takes pressure, which takes heat. If it is pushing out the overflow as soon as it starts to run without generating pressure, it means that the cap seal is bad.


Pressure can be generated in other ways than just heat. He says that when he starts it cold it immediately begins to come out the overflow, so the most likely cause is a failure in the head gasket where the compressed exhaust gasses are going from the cylinder directly into the coolant.
 
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Gmartin
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PostPosted: Wed Sep 25, 2019 12:36 pm    Post subject: Re: Overheating Reply to specific post Reply with quote

All,
I went to town today (90 miles round trip) & bought a new radiator cap. Now the tractor won?t start. Put battery on charger & will try again tomorrow.
Again, thanks everyone for your help. I am really hoping it?s the cap because it works better for both my budget and my talents.
Gary
 
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Larry NCKS
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PostPosted: Wed Sep 25, 2019 3:43 pm    Post subject: Re: Overheating Reply to specific post Reply with quote


I'm sorry, but I'm betting there's more to it than just a bad cap. If you have coolant fill 2 inches down and it immediately starts coming out the overflow upon start up, you have a combustion gas intrusion into the cooling system.

The pressure of compression is much higher than the pressure in the cooling system even at normal operating temperature. Whatever is allowing combustion gas into the cooling system is not severe enough to allow coolant back into the engine.
 
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