Just did my 2007. Went in through the wheel well. You need locking pliers to get the retaining ring off. Pull the hose off and bend it out of the way. Use a universal adapter for your socket and a few extensions. It's tight but with the universal you can get around the alternator. Reassemble and tighten with a torque wrench. The universal adapter is the key. Took about 1.5 hrs. Best of luck to those looking for answers.
the reason you go through the wheel well is so you can check for leaks while running engine if you go the alt route and find a leak you will have to remove alt again
I did this by removing the front tire way. My advice is to put the radiator hose on the new thermostat first making sure the holes on the thermostat line up without twisting the hose. I had my lower hose already on the bottom of the radiator but not tightened. Gotta tweak it. I tried putting the thermostat on first then trying to move that heavy duty hose clamp into place. Impossible.
Hi... nice hummer.. Sorry to ask... whats size and ring are those tire and brand? can you give me the exact number for both... your look great! thank you!!!
Anyone ever get a smell of hot burning rubber when driving at slow speed w their hummer? Heat gauge was up close to 3/4. Wondering if the thermostat might be going out? Thanks I’m advance for any suggestions! 😊
If you are going to attempt to do it through the fender well make sure you get some STURDY pliers with very very long handles. I've been at it for 3 days trying it through the fender well, I have bought two sets of pliers already and neither were sturdy or long enough. The reason is, you have very limited space, and the clamp is fucking strong af. So i am going to do it the way this guy did it because in my opinion if you dont have little arms and hands and have the grip strength of a strong man then you would be better off doing it the way this guy did. I swear wish I would have done it this way from the beginning I would have BEEN DONE. Through the fender is less work and not bad if you get the right pliers but then after that the top thermostat bolt is a bitch to get too. Have a small ratchet with an extension.
Did you ever have a different reading on the heat gauge after replacing the thermostat ? i got the thermostat replaced and after it was replaced the reading was different. It was reading alot hotter than usual is that normal ?
Yes, I was reading around 165 at the ECM and the gauge was about a quarter to 3/8 before. After I was at 190 at the ECM and halfway to a little above it.
@@donp2474I’d love to know this as well. Just yesterday my wife and I were two tracking (very easy and not rough terrain), about 5 mph and the temp went up to almost three quarters. Anyone know if this is normal? Maybe I need a new thermostat? Thanks for any suggestions in advance
It's highly likely. Other reasons may be the sensor is not accurate so it shows a lower temperature. I checked that first and confirmed it was the t-stat.
@Chuck Collins I have no idea, you should ask whoever told you that. It's built into the the inside of the housing unlike many other thermostats, so maybe that's it.
Just did my 2007. Went in through the wheel well. You need locking pliers to get the retaining ring off. Pull the hose off and bend it out of the way. Use a universal adapter for your socket and a few extensions. It's tight but with the universal you can get around the alternator. Reassemble and tighten with a torque wrench. The universal adapter is the key. Took about 1.5 hrs. Best of luck to those looking for answers.
the reason you go through the wheel well is so you can check for leaks while running engine if you go the alt route and find a leak you will have to remove alt again
I did this by removing the front tire way. My advice is to put the radiator hose on the new thermostat first making sure the holes on the thermostat line up without twisting the hose. I had my lower hose already on the bottom of the radiator but not tightened. Gotta tweak it. I tried putting the thermostat on first then trying to move that heavy duty hose clamp into place. Impossible.
Hi... nice hummer.. Sorry to ask... whats size and ring are those tire and brand? can you give me the exact number for both... your look great! thank you!!!
Firestone MT2 315/75R16
Anyone ever get a smell of hot burning rubber when driving at slow speed w their hummer? Heat gauge was up close to 3/4. Wondering if the thermostat might be going out? Thanks I’m advance for any suggestions! 😊
If you are going to attempt to do it through the fender well make sure you get some STURDY pliers with very very long handles. I've been at it for 3 days trying it through the fender well, I have bought two sets of pliers already and neither were sturdy or long enough. The reason is, you have very limited space, and the clamp is fucking strong af. So i am going to do it the way this guy did it because in my opinion if you dont have little arms and hands and have the grip strength of a strong man then you would be better off doing it the way this guy did. I swear wish I would have done it this way from the beginning I would have BEEN DONE. Through the fender is less work and not bad if you get the right pliers but then after that the top thermostat bolt is a bitch to get too. Have a small ratchet with an extension.
Hi there , do Hummer H3 have Thermostats with a Valve to Bleed them , if not then how
did you bleed the air out of the Coolant System please ?
They have a pretty high radiator and reservoir. The air doesn't get trapped in the head.
When you say "15 mil", do you also refer as "9/16 sae " or jus 9/16? Curiosity jus killing me....
15 millimeters
Did you ever have a different reading on the heat gauge after replacing the thermostat ? i got the thermostat replaced and after it was replaced the reading was different. It was reading alot hotter than usual is that normal ?
Yes, I was reading around 165 at the ECM and the gauge was about a quarter to 3/8 before. After I was at 190 at the ECM and halfway to a little above it.
@@robjackson4046the H3 tends to run hotter than most other trucks or SUV's....what can be changed or improved on the H3 to help it to run cooler?
@@donp2474I’d love to know this as well. Just yesterday my wife and I were two tracking (very easy and not rough terrain), about 5 mph and the temp went up to almost three quarters. Anyone know if this is normal? Maybe I need a new thermostat? Thanks for any suggestions in advance
I will tel you once I have replaced my thermo that is always giving my thermistor sensor a low temp reading. @@matthewbunker1007
Hi which hummer engine is more reliable, old 3.5 or newer 3.7. Thank you.
Newer 3.7 is quite a bit better
The V8 5.3
He took the long route to removing the thermostat.
Maybe, it didn't seem unreasonably long to me.
What’s the shorter route? I’m doing mine
Comes out through plastic wheel well
if replacing it drop the temp 10 deg will run better..
What do you mean can you explain?
@@gohan9638 he means 10 degrees celcius lower temperature thermostat, 85 degrees instead of 95 for example
To much work! Trust me go in through the fenderwell. 20 min in and out.
20 minutes, that's amazing! I don't think I'd be able to do it through the fender that fast. I just wanted to see what it was like this way.
Steve .is that the way to keep the car hot.cuz i have issue to keep it hot
It's highly likely. Other reasons may be the sensor is not accurate so it shows a lower temperature. I checked that first and confirmed it was the t-stat.
@Chuck Collins I have no idea, you should ask whoever told you that. It's built into the the inside of the housing unlike many other thermostats, so maybe that's it.
Does your h3 still heat up
I’m 17 this took me forever to do took off fended and alternator
all in the name of experience!