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1998 V6 3800. Thermostat question #5044095
03/15/19 04:55 PM
03/15/19 04:55 PM
Joined: Sep 2009
Posts: 1,091
Illinois
Mark72 Offline OP
Mark72  Offline OP

Joined: Sep 2009
Posts: 1,091
Illinois
This car uses a factory 192 therm but I can also put a 180 in it. Would that hurt anything? This car runs at 210 and then when it's hot it goes up between redline and 210.

Re: 1998 V6 3800. Thermostat question [Re: Mark72] #5044114
03/15/19 05:07 PM
03/15/19 05:07 PM
Joined: Sep 2014
Posts: 1,646
Toronto Canada
WobblyElvis Online content
WobblyElvis  Online Content

Joined: Sep 2014
Posts: 1,646
Toronto Canada
The engine and associated engine management was designed with a 192 stat in mind. Changing it to a different value will thrown things off. If your car is over heating, you have a different set of problems that should be addressed first.

Re: 1998 V6 3800. Thermostat question [Re: Mark72] #5044162
03/15/19 05:31 PM
03/15/19 05:31 PM
Joined: Jul 2011
Posts: 458
Martinsburg West Virginia
71Chevyguy Offline
71Chevyguy  Offline

Joined: Jul 2011
Posts: 458
Martinsburg West Virginia
I have actually experienced this and can comment from my experience. I read that it is better for the car to have the 180 degree thermostat in it, so I tried it in both of my 3800 cars. One is supercharged,the other one isn't. If you do go to a 180 thermostat, it has to be one that doesn't have the little relief hole in it to keep air out of the system. There would be enough of a bypass to set a check engine light if it had the bypass hole. As for how the car drove? Heat was fine, not usually an issue in these cars. No check engine light. Temp on the gauge was a bit lower but didn't really seem to affect anything. Tranny stayed cooler for sure, because mine acts up as it heats up and that was definitely better. If your car tends to ping occasionally, it did remedy that in mine. Overall it did drive a little better, not much but there was a difference. I would say it had more mid-range torque probably due to not pulling timing from higher engine temps. What was a deal breaker for me, was that it cost me about 5 mpg. So since I drive drive a lot, the oem thermostat went back into both cars and fuel economy went back up instantly. So it is up to you, if you are having issues keeping it cool in a very hot area, such as Florida, then it might be a good idea to switch, may not even lose fuel economy there. If your vehicle is overheating , then you need to fix the problem , not mask it with a thermostat. This is all assuming you have taken care of the intake gaskets and upper manifold issue if that hasn't already been done on your car. * Just noticed you are in Illinois, unless you constantly sit still in traffic, you probably are better off staying with the OEM temp. Down south is a different story.

Last edited by 71Chevyguy; 03/15/19 05:32 PM. Reason: Noticed location.

18 Focus 1.0 Valvoline Modern Engine 0w20 / STP XL filter
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Re: 1998 V6 3800. Thermostat question [Re: Mark72] #5044176
03/15/19 05:36 PM
03/15/19 05:36 PM
Joined: Nov 2006
Posts: 21,792
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,792
MA, Mittelfranken.de
Its not going to make much difference one way or the other but I would make sure the electric fans are working properly. If one or both (IIRC this has 2) has failed the temps will increase no mater what the thermostat temp is.


ASE L1, Master. Deutsch Meisterbrief.
Re: 1998 V6 3800. Thermostat question [Re: Mark72] #5044312
03/15/19 07:08 PM
03/15/19 07:08 PM
Joined: Jun 2003
Posts: 18,876
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline

Joined: Jun 2003
Posts: 18,876
Deplorable in apple valley, ca
The stat only controls the minimum temp. If you change it to a lower temp its still going to run the same temp once the stat is fully open.


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