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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

engine temp

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double d

04-14-2005 20:38:41

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how hot is too hot for a 40hp diesel? Is 220 ok

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RAB

04-14-2005 23:33:33

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Re: engine temp in reply to double d, 04-14-2005 20:38:41

How are you measuring the temp? Have things changed recently? First check your gauge? Check radiator? pump belt? Fan belt?
Does it cycle around that temp or rise and stay at the max all the while? Is this normal running or really hard at work? Thermostat working OK?
Hope this helps. TV is right that it should not be that hot, but my first guess is that your gauge is indicating a few degrees wrong.
Regards, RAB

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the tractor vet

04-14-2005 21:25:28

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Re: engine temp in reply to double d, 04-14-2005 20:38:41

No , 190 to 200 is about all you should go. . Better start checken why it is going that high and hope you did no harm.

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double d

04-15-2005 20:20:13

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Re: engine temp in reply to the tractor vet, 04-14-2005 21:25:28

thanks for the response. I have a rebuilt water pump, a new thermostat, my fan belt is tight.The only thing that is not oem is the mechanical temp gauge I purchased at auto parts house,when I replaced the water pump the original temp gauge line from the block to the gauge got damaged beyond repair,I have heard the universal temp gauges were not that accurate. The machine usually runs @ 190. When I work it hard in summer months is when it reaches 220. I can let it idle for @ 15 minutes and it will drop back to 190. I do a lot of clearing and the radiator constantly has to be power washed to remove debris. I've heard a check from top to bottom of radiator with a heat gun will tell if the radiator is stopped up.Please let me know if I am overlooking anything.
Thanks Doule D

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RAB

04-16-2005 00:04:01

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Re: engine temp in reply to double d, 04-15-2005 20:20:13

So we are looking at a quite old 40 HP diesel (mechanical temp gauge)? Is it a pressurised system or not?

If not, the block could easily have a build-up of sediment from hard water over the years, due to continual topping up, especially if it was drained rather than antifreezed and was filled with hard water (or even water with suspended particles).
My starting point would still be remove vial (if capillary tube is long enough) and immerse in a boiling kettle.
"Course, another Q. might be - has radiator been recored with a few less tubes at any time, or replaced with one from a gas model. It happens. Sometimes replacement radiators are not exactly as OEM. We are flying in the dark more than you so I hope you can sort it - but let us know what you find as any feedback will help other posters
Regards, RAB

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double d

04-16-2005 07:17:57

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Re: engine temp in reply to RAB, 04-16-2005 00:04:01

It is a pressurized system, in the summer I see a seeping from the radiator hose and have to top
off with antifreeze.I put sealer on the hose and tightned.What is confusing is the old gauge did not have numbers just green &red my new gauge has numbers in degrees. It is a 1985 komatsu d-20 dozer,when I noticed the warmer than normal temps was after the water pump was rebuilt,but I am getting good circulation and there is no oil in water or water in oil or no bubbles in the radiator. This one is tough to figure out.

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