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Author Topic: Engine Thermostat  (Read 1855 times)


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Engine Thermostat
« on: March 06, 2014, 04:35:14 PM »
I test drove a 1990 ford eco camper van, besides the minus 2 degrees outside the engine temp gauge stayed mostly near the c, the heater did blow warm air. I asked the seller about it and he said the van is from florida and the thermostat was taken out to prevent any overheating, he never installed one when he brought it to PA because he only used the van from spring to fall and then had it stored. The thermostat story makes sense to me but is it true?


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Re: Engine Thermostat
« Reply #1 on: March 06, 2014, 05:25:03 PM »
Could be true, but foolish.  Proper engine temperature is important for optimum efficiency.  Put the proper thermostat back in.
Tom & Joyce and Ditto the "don't tell her she's a dog" Westie
U.S. Navy (Ret)
2014 Winnebago ERA 70X 24' class B Sprinter chassis


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Re: Engine Thermostat
« Reply #2 on: March 06, 2014, 05:55:54 PM »
No thermostat means a rich running engine. The computer looks at the engine temp and keeps it in open loop when it see cold. There could be other problems that will not show up in open loop such as bad O2 sensors etc......
2009 Bounder 36B, 2014 Honda CR-V, various grandchildren when school is out. KG4LHS
2014 Honda CRV Toad,
2014 Jeep Grand Cherokee Toad


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Re: Engine Thermostat
« Reply #3 on: March 06, 2014, 07:09:41 PM »
His story could make sense but not positive until it gets warm enough for the engine to get hot enough to prove that it doesn't overheat. The t-stat would not have been removed it the engine was cooling properly. In other words, removing the thermostat is not considered preventative maintenance.

Engineers would gladly leave out a thermostat if it would improve cooling, economy, or performance. Truth is that it is necessary. That goes for the correct radiator cap also. The function of these go far beyond just keeping the water in and making the heater work.
Will and Jane
95 Winnebago Luxor


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Re: Engine Thermostat
« Reply #4 on: April 27, 2014, 09:22:20 PM »
A lot of shade tree mechanics pull the thermostat.    Easy check and cheep fix. If its missing I would flush the cooling system whial you got it open.   Theirs a reason the thermo state was pulled
1996  26ft. 3 kids 2 dog and the wife too

Lou Schneider

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Re: Engine Thermostat
« Reply #5 on: April 28, 2014, 12:54:06 AM »
Also check for gas bubbles in the coolant.  Sometimes a thermostat is pulled to try and prevent overheating caused by a blown head gasket or a cracked head sending exhaust gasses into the coolant.


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Re: Engine Thermostat
« Reply #6 on: May 18, 2014, 05:00:15 PM »
I have seen it done many times here in the South.
Also many people at one time replaced them with a "cooler" one
so it opens quicker in the summer, which really does little.

Like others have said. Open the cap and start the motor.
Wit the thermostat out you should see the coolant running and
no bubbles.