9N over heating

dadafan

New User
Hi,
I have a 9N that is overheating. Brand new radiator, new water pump, and new thermostat in the top radiator hose. The fan pulls air through the radiator. Should the thermostat be in the top tube or bottom tube?

Thanks
 
See tips 24 & 25 at the link.

But, sometimes you just have to bite the bullet & flush out the block. To do that, remove the t-stat from the top hose. Then, remove the bottom hose from the radiator, stuff a rag in the bottom radiator hose connection, & stick your garden hose in the top of the radiator. Turn the water on (reverse flush) & the water will flow into the radiator, then the block & out of the disconnected lower hose. Let it run until the water is clear. Then, check the radiator flow. Stick the hose in the top of the radiator; the water should flow out of the bottom w/o backing up in the filler neck. It should flow at 19.5 gallons a minute. As a final flush, put a gallon of white vinegar & about 2 gallons of water in the radiator, run it to operating temp & then drain it again. Don’t forget to put the t-stat back in correctly!

Use 50/50 anti-freeze & distilled water as your coolant. The anti-freeze contains rust inhibitors, pump lubricant & raises the boiling point of the coolant.
75 Tips
 
The '40 we fluffed a while ago was doing the same thing. Mark removed the thermostat(in the top hose) and it quit overheating.
 
(quoted from post at 23:29:05 05/11/15) The '40 we fluffed a while ago was doing the same thing. Mark removed the thermostat(in the top hose) and it quit overheating.

You are not doing the engine any favors running with out a thermostat. It is needed.

One of my 8ns was overheating and I found the fan belt was too loose.

Most common problem with overheating is the radiator is overfilled. Just above the tubes is all you want.
 
"removed the thermostat(in the top hose) and it quit overheating"

If it overheats with a thermostat and there is nothing else wrong
with the tractor, radiator over-filled etc, then the thermostat is
probably bad or it could have been installed backwards.

If you run it without a thermostat, watch your oil for moisture
and change it often. The engine will not get warm enough to
evaporate the water out of the oil. Especially if you only run it
for short periods of use. A temp gauge can be added.
 

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