Starting a tractor in extreme cold temperatures

[priberc]

Thanks. I'll look for a block heater. That one came with the tractor when I bought it last year. Regarding the oil, the owner manual doesn't mention anything below 10 grade. For below freezing, they only recommend 10W, 10W30 or 10W40. That's why I went with the 10W30.

I'll check if the pan is made of steel or aluminum and get a magnetic one if made of steel. Seems like the easiest route. BTW, my car is a Tesla so nope, no block heater there ;-)

Thinking some more on your hard start in the cold. You say that you cycle the glo plugs multiple times and no fire at all. Have you checked out if your glow plugs are working correctly? Your machine is 10 years old. The glow plugs could all be weak/not working at all at this age. There is a way to test the resistance in each pretty simple test I think. There will be a relay or two involved too and they could be weak or not working

 

[Slowpoke Slim]

Disagree Slim. With all due respect, you are wrong. In-line coolant engine heaters in fact DO circulate coolant. What ever made you think they don't ? The ones I have owned have an internal check valve arrangement. When the coil heats a quantity of coolant in the cannister it burps out a burst of hot coolant under some pressure and ingests the next batch for heating. This process can be heard and felt. That is why there is a flow arrow on the units of course. The net effect is that they absolutely DO move coolant and the warmer it gets the faster the process. If you watch the system, the hoses all get warm with the output from the heater being the hottest of course. In my experience the 1000w or 1200w units work very well. Very well matched to your typical 120v homeowner circuits. I had never heard of weak ones of only 300w until reading this thread.

Rather obviously they would not be selling the things by the hundreds of thousands over the years otherwise. I bought my first one in 1979 and they had been on the market for years before that. [Mine was from Sears and Roebuck, remember them?]

And by the way, the freeze plug substitute "block heater" type does not have any means to move coolant other than slow convection. That convection has little chance of reaching the heads where it is most needed for starting, though if you leave it on long enough the warming process does work. The advantage of the in-line radiator hose installation is that the heads and entire system get warmed via the liquid flow in the coolant passages.

This:

Radiator Hose Heater 1-1/4" 600 Watt

Is the style of lower radiator hose heater I was referring to. There is no "circulation" happening inside the heater unit. It is only a heater element that "wraps" around the coolant passage.

I think THIS:

Circulating Coolant Heater 1000 Watt 120 Volt

This must be the type of heater you are referring to? I have never seen one of these in the field. Never knew THIS style existed until I just now searched for it.

What the OP (and I) have been referring to is the first one. The heater that goes in the line of the lower radiator hose. My description of how this type heater works stands.

 

[SylvainG]

Yes, this is the type of heater I think the tractor has. I don't think it recirculates the cooling fluid. I hear no sound from it.

Regarding the fuel, I use winter diesel. I can see grey smoke coming off the muffler so I think it does make its way to the combustion chamber.

I'll also check the Glow plugs for their resistance.

 

[dodge man]

The cheapest thing to do is build a 1500 sf well insulated and heated shop and park the tractor inside it

 

[doneill127]

Just two comments, on many diesels mine included there is a flow path with the thermostat closed.

Second the water will circulate with both types of heaters. Called natural circulation. Happens because of the density difference, ie heat rises cold sinks. Same principle some large boilers or powerplants work on, at least that’s what I was taught as a power plant engineer. Block heater probably better because typically higher wattage and better location.

 

[Egon]

So I buy stick on ones off of Amazon. 250 watt for roughly $20.

At -35 the

No.

Not even close. The "heater" that you install in your lower radiator hose will NOT circulate ANY coolant. It is a closed system. There is no circulation until you start the engine and the water pump starts circulating coolant through the system.

A block heater heats the coolant that's sitting stationary in the block. That warms the block. That is what you're after. A warm engine block, and some of that heat does transfer to the cylinder head through the castings.

A radiator hose heater only heats the coolant that is sitting stationary inside the rubber radiator hose. The only way to circulate that warm coolant is to crank the engine, which will circulate the warm coolant a little bit (depending on if or how much "bypass" is plumbed into your coolant system, because remember, your thermostat is CLOSED, so only the small bypass passage (if you have one) will flow any coolant at the far end of the cooling system). So the warm coolant in the hose is replaced with -35 F coolant that came out of the radiator in about 5 seconds and you stop cranking and start the whole process over again of heating the cold coolant sitting in the hose again.

Not quite "worthless" but close enough to it to call it so.

Remember, there is NO "flowing" coolant unless the engine is running, or cranking, to rotate the water pump at the front of the engine.

In line heaters are just as effective as a block heater. the cooling fluid will circulate and heat the block.

 

[Egon]

Just two comments, on many diesels mine included there is a flow path with the thermostat closed. View attachment 731876View attachment 731877

Second the water will circulate with both types of heaters. Called natural circulation. Happens because of the density difference, ie heat rises cold sinks. Same principle some large boilers or powerplants work on, at least that’s what I was taught as a power plant engineer. Block heater probably better because typically higher wattage and better location.

Right you are. There are lots of misconceptions about coolant heaters and how they operate floating around.

 

[John0829]

This:

Radiator Hose Heater 1-1/4" 600 Watt

Is the style of lower radiator hose heater I was referring to. There is no "circulation" happening inside the heater unit. It is only a heater element that "wraps" around the coolant passage.

What the OP (and I) have been referring to is the first one. The heater that goes in the line of the lower radiator hose. My description of how this type heater works stands.

Hate to break it to ya but old Farmall A's and some other tractors, have no water pump to cool them and using that first style of heater is no different. Hot water rises and the cold settles, natural circulation same as when the engine is running.

 

[RancherGuy]

Yes, this is the type of heater I think the tractor has. I don't think it recirculates the cooling fluid. I hear no sound from it.

Regarding the fuel, I use winter diesel. I can see grey smoke coming off the muffler so I think it does make its way to the combustion chamber.

I'll also check the Glow plugs for their resistance.

Thought I would include this link so you can visualize what could happen in extreme cold. All oils - engine and hydraulic - will have very high viscosity. Just because the engine starts does not mean your hydraulic system will be good to go. The warmer everything is, the better for the tractor and pocketbook.

 

[the old grind]

Just two comments, on many diesels mine included there is a flow path with the thermostat closed. View attachment 731876

A question or two: The arrow in the pic shows flow from the top radiator hose into the radiator as if the water pump is turning and the thermostat is open to allow circulation by any means, but it's shown closed. How does that work when the engine is cold??

The bypass also circulates to the pump, not the radiator. I suggest the 'loop' shown by arrows could be misleading as to a low temp coolant 'circuit', however typical it is. Will a hose heater open the thermostat? If not, for liquid to rise/convect to the block some also has to descend along the same hose to be heated. IMO that could slow 'circulation' down a bit.

A picture may be worth a thousand words, but not every observer sees the same thing. Asking for a friend.