Thermostat replaced but I have a question...

TB360

Original poster
Member
Dec 29, 2011
169
I heard TBs temp should be 195ish. After performing the thermostat replacement, my temp stays at 210ish now. No CEL but color of the light on the scantool is amber not green. Does not say any error though so I go hmmm.....Is the temp being up by few degrees should make me worry or should I change the coolant temp sensor?
 

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Sparky

Member
Dec 4, 2011
12,927
Needle straight up at 210 is fine and pretty much correct.
195 is pretty much the lowest point you can be at and still be OK.
 

bobdec

Member
Apr 19, 2013
233
My temp on dash reads straight up (210*) when the scanner hits 195*. The dash reading then stays at 210* anywhere between 195 and 205 on the scanner. I've never been over the mid 200's so I don't know what actual temp it takes before the PCM moves it over the 210 display. Not as drastic as the oil gauge, but just Another case of the PCM (engineers) taking over a gauge to make things look stable.

I do miss the ability to see my real temp. I'd rather see it fluctuate 10-15 degrees than sit there showing a dumb 210 all the time. A reason my elm 327 is always attached to the ALDL. I pull up my phone's Torque App and watch the actual water and tranny temp when in the mountains or towing.
 
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Sparky

Member
Dec 4, 2011
12,927
My 02 was closer to accurate. It sat at 1 tick below 210 for several years, which the scanner showed I was typically running around 195 - my tstat was a bit weak but was still OK for a long time until it finally started wavering this past summer. Maybe they did a bit more "smoothing" in later years.
 
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HARDTRAILZ

Moderator
Nov 18, 2011
49,665
Mine sits just like that one above and real temp is 195 on the scanguage. About 230 the needle creeps to the right.
 

IllogicTC

Member
Dec 30, 2013
3,452
190-220 is the accepted optimal operating range for the I6. Most of this degree range will just point at 210 on the thermostat, as it's not an analog unit it's just given a spot based on current temperature. The best way to provide accurate real-time monitoring is with a scanner via OBD-II.
 
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TB360

Original poster
Member
Dec 29, 2011
169
Yes! Thanks guys for the responses.You guys are great!
 
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nagyiii

Member
Apr 26, 2014
73
mine was straight up 210* until I got a cel code for faulty t stat, then it only went to just past a 1/3 of the way. Once I had it replaced, straight up 210* and no cel!
 

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