engine temp to hot?
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Senior User
Joined: Mar 2009
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engine temp to hot?
Hi guys, after being suspect of a bad dash gauge i installed a aftermarket temp gauge. It was showing 210 deg. Is this too hot for a 180 deg. thermostat installed? I have just changed the radiator, hoses, thermostat, fan clutch. and the water pump. any ideas?
Lead Driver
Joined: Nov 2002
Posts: 9,557
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From: Concord, NC
With a 180° thermostat, my truck ran anywhere from 180 in the winter to close to between 195 and 200 in the summer. Now I have a 192° thermostat and the temperature stays right around 190-195. It won't really hurt anything running at 210, but I would think that the operating temperature with a 180° thermostat would be a good bit closer to 180 than 210.
Elder User
Joined: Nov 2006
Posts: 973
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From: Texas
210 is perfectly normal. Especially in the summer. Many people believe that a 180 t-stat should keep the engine at 180, but in reality it doesn't start opening until 180, and opens more and more as the engine heats up.
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Senior User
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i always thought that the 180 deg.t stat keeps it at 180. but i assumed that it would get higher with a load. I also used a infrared temp gun on the upper hose at the water neck and that showed 180 deg. while the gauge showed 190 deg. kinda weird to me but as long as theirs no steam from the radiator it's all good.
Posting Guru
Joined: Sep 2008
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From: Baltimore
210 is cool, so to speak. (OK in laymen's terms.)
A thermstadts temp rating is when it's supposed to open. Go with the trucks OEM rating for the engine, keep your rad clear of debris, and check the hoses and coolant (Antifreeze/water mix) ratio correct. Also check your cooling fan for proper operation.
A thermstadts temp rating is when it's supposed to open. Go with the trucks OEM rating for the engine, keep your rad clear of debris, and check the hoses and coolant (Antifreeze/water mix) ratio correct. Also check your cooling fan for proper operation.
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Senior User
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here's another question, when does the top radiator hose get hot, and hard? I can squeeze mine shut. does that mean the t-stat is closed? I did notice before that the hose was hard and hot.
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Lead Driver
Joined: Nov 2002
Posts: 9,557
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From: Concord, NC
The thermostat's rated temperature is where it should regulate the coolant temperature, within a few degrees, unless the cooling system cannot reject enough heat to keep it that low. Heat rejection increases with temperature delta, so the cooling system temperature rises until the heat rejection matches the heat input from the engine.
The cooling system should build pressure as the engine builds temperature, up to the relief pressure on the radiator cap. If it is not building pressure, check the radiator cap and the tube that connects to the overflow tank. Even if the thermostat was not opening, the system should build pressure.
The cooling system should build pressure as the engine builds temperature, up to the relief pressure on the radiator cap. If it is not building pressure, check the radiator cap and the tube that connects to the overflow tank. Even if the thermostat was not opening, the system should build pressure.
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Post Fiend
Joined: Nov 2008
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From: McKenzie River
210 is fine, nothing to worry about.........................This is why new vehicles have temp guages that just say,.......Cold - normal - Hot......If they actually had numbers on them telling how hot they really run, most people would **** themselves!
Posting Guru
Joined: Sep 2008
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From: Baltimore
Not to hijack the thread, but keeping with the theme, there is a recipe book pertaining to the art of 'manifold cooking', where-as, you wrap food goodies in tinfoil, place it on the engine and drive for a period of time. When you get to your destination, dinner is done...
I know, I know...
Please do the research. While on an aircraft-carrier, I kept my lunch/dinner hot by placing it in the frame of the main engine.
Your coolant temp may be 210-ish, (regulated), but the underhood temps can go beyond that.
I know, I know...
Please do the research. While on an aircraft-carrier, I kept my lunch/dinner hot by placing it in the frame of the main engine.Your coolant temp may be 210-ish, (regulated), but the underhood temps can go beyond that.
Elder User
Joined: Oct 2005
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From: Angleton Tx.
Besides the oil is not as effective unless the temp is at or around 200, I read on another site where extensive study has been done, That is the temp the meatl actually absorbes the oils molecules
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