I have a question about temperature. I have a 1987 M998. It runs around 220 degrees. Some people I've talked to say that that's fine because the older ones ran hot. Some people say that I'm going to blow the head gasket. The gauge is accurate. I did an infrared temp at the thermostat. Any info would be greatly appreciated.
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How Hot Is Too Hot?
- Thread starter Sand
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As long as the fan is kicking on at that temp and cooling it down about 10-20 degrees then kicking off, then you should be fine.
Above 230 degrees is when you need to start worrying, but 220 is fine.
Water boils at 212 at sea level.
Under 15psi pressure (standard radiator cap) the boiling point is raised to over 250 degrees. As long as you aren't boiling over coolant during your normal operation, you are good.
The newer trucks run hotter than the old ones. I believe the turbo trucks are allowed up to 240 before it shows overheating
Above 230 degrees is when you need to start worrying, but 220 is fine.
Water boils at 212 at sea level.
Under 15psi pressure (standard radiator cap) the boiling point is raised to over 250 degrees. As long as you aren't boiling over coolant during your normal operation, you are good.
The newer trucks run hotter than the old ones. I believe the turbo trucks are allowed up to 240 before it shows overheating
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My fan kicks on at 220.
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220 then the fan kicks on with my 91 M998. I would like it a little cooler but this is how they are setup. I wonder what thermostat they have in them.
Mark
Mark
My guess is it’s from the lowest bidder.
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The gauge sender is under the alternator in the cylinder head which is the hottest part of the system.
the fan sensor is in the water neck right behind the thermostat which should be 190 degrees.
If your fan cycles on and off while moving, your system is working perfectly.
The gauges are usually not accurate
the fan sensor is in the water neck right behind the thermostat which should be 190 degrees.
If your fan cycles on and off while moving, your system is working perfectly.
The gauges are usually not accurate
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I really does not matter what thermostat they have in them as the fan controls the temp.
If the fan came on and the temp continued to climb then I would consider the thermostat but as it is the thermostat is fully open by the time the fan kicks on.
I tried many things, thermostats, no thermostat, putting a restriction in the bypass hose to force more water through the radiator and never saw a nickles worth of difference.
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To answer OP as phrased:
>220 too hot
Blurred lines Emily Ratajkowski, Elle Evans, and Jessi M'Bengue, too hot
Naomi Campbell in her prime, too hot
Carmen Electra in her prime, too hot
Get a laser thermometer to confirm engine temps prior to going crazy. Meters are notoriously inaccurate
>220 too hot
Blurred lines Emily Ratajkowski, Elle Evans, and Jessi M'Bengue, too hot
Naomi Campbell in her prime, too hot
Carmen Electra in her prime, too hot
Get a laser thermometer to confirm engine temps prior to going crazy. Meters are notoriously inaccurate
What do you set your emissivity to on your laser thermometer for a humvee block?
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Emissivity
Description
The emissivity of the surface of a material is its effectiveness in emitting energy as thermal radiation. Thermal radiation is electromagnetic radiation that most commonly includes both visible radiation and infrared radiation, which is not visible to human eyes.
Emissivity is defined as the ratio of the energy radiated from a material's surface to that radiated from a perfect emitter, known as a blackbody, at the same temperature and wavelength and under the same viewing conditions. It is a dimensionless number between 0 (for a perfect reflector) and 1 (for a perfect emitter).
HumV and MIT do not go together. If the spit sizzles it's too damm hot. Aaahhh... just kidding.
Seriously, CAMO
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I think your laser thermometer is a lot fancier than the ones we're used to.
You don't need it exact; all you are trying to find out is if it's close to where it should be or not.
You don't need it exact; all you are trying to find out is if it's close to where it should be or not.