Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

Replaced thermostat today what fun...

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Old Nov 16, 2019 | 04:21 PM
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Eurynomestolas's Avatar
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Default Replaced thermostat today what fun...

So I didn’t think about it when I could feel a little heat when I first bought the vehicle. So I didn’t think much of it until the snow started flying. I noticed the temp gage would stay around the 1/4 line. The cold mornings I would let it run for 15mins and it would be like warm and like wtf. So replaced the thermostat. Watch a video on YouTube and when I got the wheel well off the top thermostat bolt was a challenge to get out. Also to putting back in I dropped the bolt!!!!!!!! What a nightmare. Ending up finding it snagged behind the brake lines after changing my viewing angle whew!!!! Coolant was good so I just reused the coolant. Added a little bit more to the overflow. Now I have heat!!! I have burning heat!!!! The engine seems like it’s also running better.

Question - where exactly does the temp gage stay at mine is over the half mark and I think I have some air in the lines.
if I do how do you get it out?
 
Old Nov 16, 2019 | 06:00 PM
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Where exactly is your temp gauge? Post a pic.
 
Old Nov 16, 2019 | 06:41 PM
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Pics would help as well as to know which engine... Did my H3 with 5 cyl engine as well, not too long ago with the radiator. Had the "AC off" message, plus the rad leaking so it was an obvious thing to do. Temp gauge used to be between 1 quarter and 1 half before. Now runs a little over half consistently, but these things are notoriously inaccurate. No AC off message, been running great so far. Air in the coolant line is normal and will self-bleed after a while, keep extra coolant handy and top off as needed.
 
Old Nov 16, 2019 | 06:52 PM
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Originally Posted by BillNC
Pics would help as well as to know which engine... Did my H3 with 5 cyl engine as well, not too long ago with the radiator. Had the "AC off" message, plus the rad leaking so it was an obvious thing to do. Temp gauge used to be between 1 quarter and 1 half before. Now runs a little over half consistently, but these things are notoriously inaccurate. No AC off message, been running great so far. Air in the coolant line is normal and will self-bleed after a while, keep extra coolant handy and top off as needed.
I will post a pic of the gage tomorrow at full temp. It’s a 07 3.7 I have some extra coolant so I will top it off. Thanks
 
Old Nov 16, 2019 | 07:18 PM
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Originally Posted by BillNC
self-bleed after a while, keep extra coolant
You are on top of it!
Most important is to be prepared, out with the old in with the new
12346290 12346290

Just to add, make sure to get a gallon of distilled water(not tap) to mix with= 2gallons.
 

Last edited by hummerz; Nov 16, 2019 at 07:50 PM.
Old Nov 16, 2019 | 11:35 PM
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here is where the temp is sitting
 
Old Nov 17, 2019 | 06:35 AM
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Originally Posted by hummerz
You are on top of it!
Most important is to be prepared, out with the old in with the new 12346290

Just to add, make sure to get a gallon of distilled water(not tap) to mix with= 2gallons.
Do a bit of research. You will find that you SHOULD NOT use distilled water but rather quality “drinking” water.
 
Old Nov 17, 2019 | 11:50 AM
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or just buy idiot proof premixed 50/50
 
Old Nov 17, 2019 | 01:48 PM
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Originally Posted by bronxteck
or just buy idiot proof premixed 50/50
Agree ! That eliminates the question. There are strong opinions for both distilled and just mineral free water mix. Hyperlube has probably done as much research on this topic than the auto companies.
 
Old Nov 17, 2019 | 02:00 PM
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Originally Posted by Ordieh
There are strong opinions for both distilled and just mineral free water mix.
 



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