Temp guage not getting very warm (Full Version)

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Temp guage not getting very warm

  

RZS2000Blazer -> Temp guage not getting very warm (1/1/2008 1:25:42 PM)

I can let my 96 4.3 4x4 blazer warm up for 15 minutes and the temp guage will only get barely over 100 degrees.  i can drive it all the way to work and the inside will never get very warm.  does anyone know why the engine is warming up very high?

  
Blazin_Jason -> RE: Temp guage not getting very warm (1/1/2008 1:44:18 PM)

Probably time to change the thermostat. 

dbleon -> RE: Temp guage not getting very warm (1/1/2008 2:00:22 PM)

I have the same problem...  Will it hurt anything to let it go like this?

swartlkk -> RE: Temp guage not getting very warm (1/1/2008 2:25:16 PM)

It'll hurt your pocket book as the truck will never get out of open loop operation (i.e. guzzle gas).  It really is quite easy to replace the thermostat.  And it is cheap too!  While you're at it, get a new radiator cap (Stant safety cap).

YepIOwnA97Blazer -> RE: Temp guage not getting very warm (1/1/2008 2:43:57 PM)

I had the same problem on my 97. finally fixed it, took about 10 minutes & $7

dbleon -> RE: Temp guage not getting very warm (1/1/2008 10:19:25 PM)

quote:

ORIGINAL: swartlkk

It'll hurt your pocket book as the truck will never get out of open loop operation (i.e. guzzle gas).  It really is quite easy to replace the thermostat.  And it is cheap too!  While you're at it, get a new radiator cap (Stant safety cap).


So I'm killing my mileage because the truck isnt getting warm?  Wow, Id love to squeeze some more mpgs out of the old beast.  I already get 20 on the highway @ just above 100* on the t-stat...  Operating temp should be at 195* right?

swartlkk -> RE: Temp guage not getting very warm (1/2/2008 3:20:33 AM)

Not to go offtopic from the original post, but if you are getting that kind of mileage, then I would suspect a faulty temp gauge sending unit.  But then again, I do not know what you are driving. 

The OP had stated that he has no heat and that it doens't come up to temperature which the two combined would first lead me to a faulty t-stat.  And yes, if the t-stat is stuck open, it would lead the PCM to be stuck in open loop mode for any '96+ vehicle.  Older vehicles may not be hindered by this.

dbleon -> RE: Temp guage not getting very warm (1/2/2008 11:59:41 AM)

quote:

ORIGINAL: swartlkk

Not to go offtopic from the original post, but if you are getting that kind of mileage, then I would suspect a faulty temp gauge sending unit.  But then again, I do not know what you are driving. 

The OP had stated that he has no heat and that it doens't come up to temperature which the two combined would first lead me to a faulty t-stat.  And yes, if the t-stat is stuck open, it would lead the PCM to be stuck in open loop mode for any '96+ vehicle.  Older vehicles may not be hindered by this.



I have the same symptoms... no heat for a really long time and low temps ALWAYS.  I have a '89 4.3 if that makes a difference...

Hanr3 -> RE: Temp guage not getting very warm (1/3/2008 5:24:16 PM)

I'll try to answer all three at once.

There are two tempature sensors, one for the gage in the dash and the other for the puter. It is possible for one to fail and not the other.

If the temp gage isn't going up and you dont have heat, your thermostat is stuck open. Replacement is the only way to fix it, and a new one is like $10 plus anti-freeze and distilled water. out the door for under $25.

If your truck has a 4L60E tranny, then yes you can cause some major damage. The short version is you can fry your tranny. The puter uses the tranny heat to get the engine up to operating temp, if it never reaches operating temp, the puter never locks up your torque converter, not only are you los mpg, but your also frying your tranny. Heat is the #1 reason tranny's fail.

bblazer123 -> RE: Temp guage not getting very warm (1/3/2008 6:13:59 PM)

I have a 96 blazer that only heats up to 100 degrees also. I have been having tranny issues. It slips in and out of overdrive and shifts sluggishly. Could the low temp be the cause?

Hanr3 -> RE: Temp guage not getting very warm (1/3/2008 6:49:41 PM)

Yes!

bblazer123 -> RE: Temp guage not getting very warm (1/6/2008 2:50:06 PM)

changed the thermostat and transmission is shifting a lot better now. Still slips quite a bit when I get on it though..

dbleon -> RE: Temp guage not getting very warm (1/16/2008 9:46:49 AM)

If anyone was following this thread, I replaced my t-stat and it did the trick.  Before my truck wouldnt even get to 110*....  Now a short drive will get it right up to 200* where it should be.  Its running alot better now too! 

swartlkk -> RE: Temp guage not getting very warm (1/16/2008 9:50:50 AM)

Very nice!  Glad it worked for you.  As you have shown, the older trucks are not as sensitive to engine temps when it comes to mileage.

quinnman105 -> RE: Temp guage not getting very warm (1/16/2008 11:35:54 AM)

I'm thinking it's time to change the T-Stat on my 2001 Blazer. 129+ on it

swartlkk -> RE: Temp guage not getting very warm (1/16/2008 11:58:33 AM)

Wouldn't hurt a thing.

quinnman105 -> RE: Temp guage not getting very warm (1/16/2008 12:40:16 PM)

Do you think I should change it? Or Should I have changed it a while ago?

theonetrueapex -> RE: Temp guage not getting very warm (1/21/2008 11:49:27 PM)

I am about to replace my thermostat tomorrow. I drove from College Station to Fort Worth and barely got above 100 degrees. Thanks for bringing this up. I thought this might be the problem, but I wasn't sure if it was going to hurt my truck immediately or if it could wait a week. (It has been raining here for a few days.) Consider one more tranny and some fuel saved.

theonetrueapex -> RE: Temp guage not getting very warm (1/26/2008 9:42:29 AM)

In case anyone was still following this, I did replace my thermostat with a ten dollar fail safe one. My heat is now almost hotter than I can handle and my truck shifts better. Thanks for the advice!

TAZ454 -> RE: Temp guage not getting very warm (1/26/2008 8:08:53 PM)

My 98 runs at 165 ,

  

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