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1st Gen Durango 1998 - 2003 Durango's

Thermostat ?'s

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Old 04-25-2010, 02:30 AM
rjkeyser rjkeyser is offline
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Post Thermostat ?'s

On my 99 durango 5.9L, what is the best thermostat temp to run, 180, 195, what? And what is the difference in them? What do they effect and what changes will each make and what can i expect with either one? I live in PA climate if that helps, thankyou in advance! All answers are appreciated!
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Old 04-25-2010, 03:03 AM
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180

hth
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Old 04-25-2010, 02:14 PM
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^ LOL ^


Use the 180 to help keep your heads from cracking. OEM is 195 but it's just a lil to hot for continuous use. Your motor will run cooler, helps with performance, less ware, and crisper response. The down side will be a lil cooler heater.
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Old 04-25-2010, 02:56 PM
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yup 180 is what most people switch to
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Old 04-30-2010, 04:08 PM
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I've read that dodge uses the 195 to make emissions cleaner. By using a 180, do you risk failing the emissions test during an inspection?
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Old 04-30-2010, 07:29 PM
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i have never heard of anyone failing bc of a different t-stat, just takes the engine a little longer to get up to the higher temperature
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Old 04-30-2010, 10:41 PM
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IIRC, it was the older models of cars that do not have the OBDII connections that had "sniffers" out into the tail pipe to help with inspections. The hotter the engine, the more impurities burnt off to pass the emissions test. The newer models have the OBDIIs that connect right to the inspections computer and takes abot 15 minutes to run the test. Anything wrong would be picked up and taken care of there. I may be way off but that's what I was told.
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Old 05-01-2010, 12:43 AM
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idk how long the computer checks for, but they OBDI is checked with the tail pipe sniffer, and OBDII is checked by plugging the computer into the data plug
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Old 05-01-2010, 03:56 AM
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I was told by a mechanic that using a 180 would cause the computer to run funny causing improper readings and it then readjusts the airfuel ratio trying to make up for the change. Is this true? Maybe i should keep the 195 then, will the 180 help with the electric fan swap and keep it cooler, i have no fan clutch now just daul efans, so wich tstat is my better choice then?
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Old 05-01-2010, 10:58 AM
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either one will be fine and niether one will throw a cel or affect the computer, i would change the tstat, and then get a new mechanic bc the one you have is not very bright
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