Is it to hot?

[Car Doc]

Smoody,

I usually watch cars warm up to the thermostat opening before I close them up and take my test drive and the water will be moving fairly quick and normally when you gas them the water level usually drops a bit.

My theory is because the pump is pulling harder than its pushing is my theory but thats what I usually see on known good pumps. fwtw

just for conversation but I have seen maybe 2 or 3 bad impellers in my whole 40+ year career clear back to a kid fixing neighbors cars. One was a 350 Chevy van they ran with straight water it had no ears on it. I figured it out because there was no circulation thru the heater it really never even ran warm.

In the last few years I ran across a v6 Camry that had a heck of a rattle in the timing cover and I pulled the pump and it had a plastic impeller that came loose from the shaft and gouged the block something terrible. I showed the guy and told him it may not work but it did just perfectly.

So the moral to the story is water pumps are rarely the problem in a overheat situation from my experience anyway.

 

[Scotty Dive]

What temp should we be seeing? On my after market guage and verified with a HF infra red thermometer I only get 120 degrees at the most. Is that tool cool? I know I had a too cool engine in my V6 Dauntless (Jeepster) and the valve covers were pretty gunked up becasue of it.

 

[Gary Fowler]

I had a brand new Ford truck that would run hot under load and it after changing thermostat (I didnt see where you had done that with your tractor), mine still ran hot but would immediately cool off when I slowed down or stopped. Finally found out the radiator core was stopped up on top and the water pump was pulling so hard that it was collapsing the bottom hose and starving the engine for water. It immediately cooled down when I backed off the throttle because the water would flow again fast enough to cool the engine when about 1/2 throttle but not at full.
Likely if you have verified that the thermostat is opening fully, rodding out the radiator will solve the problem. I would invest $10 in a thermostat first. You should be able to look into the radiator and see if the tops of the cores are open at least on topside. Check you bottom hose at full throttle and see if it is not flattening out.

 

[Smoody]

Gary, the ym2210 does not have a thermostat I don't believe.

I will check the lower hose at working rpm. I just picked up a IR thermometer from Harbor Freight. I'll report back what I find.

 

[Smoody]

Today I backflushed the radiator, filled with water, ran it until it got hot, drained. Then ran hose is radiator with water on and ran the tractor until all water was flushing clear, throughly cleaned the outside of the radiator, seems to have fixed it, worked it about 1 hour plowing and didnt get above 175 degrees.

When I got back to the house I let it idle and it cooled to about 150 degrees on the guage, I then used my IR thermometer and measured temp at different locations on the tractor, here are my results:

Top of Head - 135 degrees
right under the injectors on the block - 155 degrees
Low on the block - 148 degrees

Guessing that is good, do have a question, where the exhaust connects to the block the exhaust was 225 degrees but I guess that is normal for it to be way hotter then the engine?

Also, what kind of temp range should i be seeing all across the front of radiator? depending on where I put the thermometer I got anywhere from 68-81 degrees, should it be the same throughout?

Thanks!

 

[California]

Your IR readings match what I observed and posted here a while back. My exhaust manifold was the hottest part too, but a few degrees less than your reading. All your numbers look reasonable.

The radiator should be hotter at the top and coolest at the bottom.

Everything there sounds normal.

 

[clemsonfor]

Yep just what cali said. The top of radiator all the way from left to right should be same temp within a few degrees adn the bottom should be colder as thats where its drawn into the pump and through the engine.

Not positive but i was thinking that you should see 20-30 degrees difference from the top to the bottom of radiator.

 

[Scotty Dive]

maybe I should start a thread...is it to cold?

Here are my numbers:
Bottom of Radiator 98
Top of Radiator 116
Valve Cover 125
Exhaust manifold 155

I think I have a small radiator leak so I will be removing the radiator and I will check to see if it even has a thermostat installed....but that seems pretty cold at the radiator no?

 

[Smoody]

Scotty, your radiator temps are actually higher then mine, I am reading 68-81 degrees there.

I think a diesel can run to cool but I do not know enough to give you the correct answer, but that seems low.

 

[clemsonfor]

My ym2000 and all of them dont have t-stats. Not sure but i think the 2020 dosent either i think the only difference is the powershift, but dont totally remember?