Warranty issue dispute with Kubota - Advice anyone

[sd455dan]

That's right. It's a widespread problem because all those millions of engines are not actually measuring the engine temperature, they are measuring the temperature of the fluid circulating in the cooling system.

It's the traditional way to infer engine temperature and nothing wrong with doing it that way, at least so long as there actually is a fluid circulating in the cooling system.

The problem comes about because the type of temperature sensor in common use doesn't have any way to tell if it is measuring fluid temperature or air temperature. So if a leak in the cooling system lets the fluid out, the temperature sensor cannot tell the operator about it. The temperature sensor just reports the temperature of the air sitting in system while just a foot away the lack of coolant cooks the engine.

There are types of temperature sensors that don't have that problem, and other ways to improve the coolant gauge as well - but many manufacturers don't use the better type of sensor and gauge.....although some do.

We improve engines all the time. This is something that needs improving.

My hat's off to the OP for bringing the problem up.
rScotty

Lets add another sensor to the mix that has been on many vehicles for 30 years



Cylinder Head temperature. that does not measure coolant or oil- It measures the metal temperature.

Very common with the aircooled VW crowd.

Plenty of sensors/ senders out there

K type sensors will also work

4 channel k type input hand held digital units can be had for about $30

 

[RickB]

Any technological safety or machine protection advancement can be overridden by simple indifference and ignorance. Almost like running an engine until it seizes, letting it sit and cool off and doing it over and over.

 

[sd455dan]

Any technological safety or machine protection advancement can be overridden by simple indifference and ignorance. Almost like running an engine until it seizes, letting it sit and cool off and doing it over and over.

Ain't that the Truth..

Then again , a well placed K type head metal sensor would have read temps that Will not happen in "Normal" operation as would the Radiator Coolant sensor

the ECU could Evaluate and shut the Engine down and not allow restart when either condition threshold was exceeded.



But then " some" would find a way to defeat the sensors/ reset the computer and still not check the d*** coolant level...

More software more hardware More things that can go wrong and shut down an engine- when nothing Is wrong more complexity and Factory / Dealer involvement - No thanks

 

[Peter 315]

Some of the big trucks I drive have this system when it works its good but when it doesn't its bad..The Kysor warning and engine shutdown system electronically monitors engine oil pressure, coolant temperature, and coolant level. ... If the coolant level drops below the level of a sensor in the cooling system, the low water level light comes on, and a buzzer sounds. After 30 seconds the system shuts down the engine.

 

[Ford850]

It’s not like the OP didn’t know it was overheating. He knew there was a problem with it getting too hot. He suspected the thermostat and planned to replace it, but didn’t. He didn’t know how to find or solve the problem so planned to take it to his dealer, but didn’t want to wait that long. So he continued to drive it as-is. I don’t blame him because he needed his tractor, but it’s all about risk. Take a risk and assume the responsibility.

 

[Trillium Farm]

There is no safety measure that cannot be overcome by stupidity!!

 

[aczlan]

It’s not like the OP didn’t know it was overheating. He knew there was a problem with it getting too hot. He suspected the thermostat and planned to replace it, but didn’t. He didn’t know how to find or solve the problem so planned to take it to his dealer, but didn’t want to wait that long. So he continued to drive it as-is. I don’t blame him because he needed his tractor, but it’s all about risk. Take a risk and assume the responsibility.

As I read the other thread, the temp gauge never rose above cold (due to the lack of fluid) so the OP thought that it was cold.
Either way, if the tractor shuts off and will not restart, SOMETHING is wrong and it needs to be diagnosed BEFORE you try to turn it on again.

There is no safety measure that cannot be overcome by stupidity!!

There is that...

Aaron Z

 

[rScotty]

It’s not like the OP didn’t know it was overheating. He knew there was a problem with it getting too hot. He suspected the thermostat and planned to replace it, but didn’t. He didn’t know how to find or solve the problem so planned to take it to his dealer, but didn’t want to wait that long. So he continued to drive it as-is. I don’t blame him because he needed his tractor, but it’s all about risk. Take a risk and assume the responsibility.

Exactly my point. If combustion engines came with some method of directly measuring engine temperature the OP would have known where to look for the problem. As is, when the fluid leaks out the standard temperature sensor becomes ineffective. Making that sensor sensitive to fluid level would solve the problem for everyone.
rScotty

 

[aczlan]

Exactly my point. If combustion engines came with some method of directly measuring engine temperature the OP would have known where to look for the problem. As is, when the fluid leaks out the standard temperature sensor becomes ineffective. Making that sensor sensitive to fluid level would solve the problem for everyone.
rScotty

Figure out how to do that reliably/consistently and you'll be a millionaire.
My 2008 Taurus X has a head temperature sensor, but I'm not sure if it measures coolant temperature or metal temperature.
It is usually 20 to 40 degrees hotter than the coolant temperature sensor by the thermostat.


Aaron Z

 

[Sawyer Rob]

Exactly my point. If combustion engines came with some method of directly measuring engine temperature the OP would have known where to look for the problem. As is, when the fluid leaks out the standard temperature sensor becomes ineffective. Making that sensor sensitive to fluid level would solve the problem for everyone.
rScotty

The sign of a REAL idiot is the person that has the engine get so hot, it quits running, and he looks for a temp gauge to tell him something is wrong!!

So, you keep installing gauges and staring at them! lol

SR