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.

Low temp code .. operating temp?

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Old Oct 5, 2019 | 06:16 PM
  #11  
hummerz's Avatar
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Old Oct 6, 2019 | 08:15 AM
  #12  
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From: Lewes Delaware
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Originally Posted by JerseyCoast
I actually did it myself. PITA but not impossible. Tight squeeze, need to remove tire. I use Dennis' Service Center in Brick, NJ for the H3 when I cant do it myself. They are very familiar with them.
Thanks Bro. My scan gauge readings are coming in low on temp. So You have inspired me to give this a shot. Looking at a you tube video on this replacement procedure...

Looks doable but like you said. Certainly not like the old days when thermostats were on top and easy.
 
Old Oct 6, 2019 | 04:15 PM
  #13  
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Originally Posted by wpage
Thanks Bro. My scan gauge readings are coming in low on temp. So You have inspired me to give this a shot. Looking at a you tube video on this replacement procedure...

Looks doable but like you said. Certainly not like the old days when thermostats were on top and easy.
You got that right! Lol.
Do a search here, some guys have modified the stat to the top. I wish I found this mod prior to replacing mine. I found the parts at Summit Racing website, next time it goes bad, I think I may move it up top.

I have decided to keep her til she dies. So I'm sure I will be replacing it 1 more time.
 
Old Aug 17, 2025 | 02:30 PM
  #14  
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Default 3&4core aluminum radiator’s with fans for h3?

Has anyone seen the all aluminum 3 and 4 core all aluminum radiator’s on Amazon and eBay for the H3 alpha some even come with electric fans ? Has anyone tried any of these for fitment these alphas really need better cooling but not much room to play with mine runs high on the temp gauge but good on the scanner considered trying this route but figured someone has already done it possibly
 
Old Aug 18, 2025 | 09:47 AM
  #15  
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From: Boat Town USA MI
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Originally Posted by Mastertrch2124
Has anyone seen the all aluminum 3 and 4 core all aluminum radiator’s on Amazon and eBay for the H3 alpha some even come with electric fans ? Has anyone tried any of these for fitment these alphas really need better cooling but not much room to play with mine runs high on the temp gauge but good on the scanner considered trying this route but figured someone has already done it possibly
You tacked onto a SEVEN YEAR OLD THREAD to ask this question????? For what? Start a New Thread in the H3 Section and ask away.

We've seen cheap parts at the Jungle and FleaBay and I would not use them.

You need to diagnose why your Temps are high, hold off on parts throwing. We will pick up in your new thread and I would ask, what are your Trans Temps?
 
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