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.

Still overheating! Help

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Old Jun 7, 2024 | 11:20 PM
  #11  
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Also maybe a high output fan clutch assembly? Yes, I read that you replaced it but ...
 
Old Jun 8, 2024 | 05:15 AM
  #12  
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Originally Posted by Happy Hummer
Try some of that Wet'r water or the like that you add to the rad. Put an actual louvered slat opening on the hood not the wimpy black plastic piece.
Just an example have zero personal experience with this product!

https://www.ebay.com/itm/186313036238

I already did that last summer
 
Old Jun 8, 2024 | 05:18 AM
  #13  
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Originally Posted by Happy Hummer
Also maybe a high output fan clutch assembly? Yes, I read that you replaced it but ...

thd one I replaced was the heavy duty one I think it’s high output??

is there a way to make the fan maybe run faster or is it one speed?

 
Old Jun 8, 2024 | 10:37 AM
  #14  
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There seems to be something more fundamental wrong here. Double check proper operation of everything. You shouldn't have to have special parts to keep it cool, lest there is a restriction in the block?
Is your head gasket leaking?
 
Old Jun 8, 2024 | 11:06 AM
  #15  
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Originally Posted by Justinh
There seems to be something more fundamental wrong here. Double check proper operation of everything. You shouldn't have to have special parts to keep it cool, lest there is a restriction in the block?
Is your head gasket leaking?

you know I never checked the head gasket you may be right I’ll double check and report
 
Old Jun 8, 2024 | 11:23 AM
  #16  
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Is the rubber flap on the bottom behind the skid plate missing?

Mine will over heat without it, I too have a separate transmission cooler, did a head gasket leak test, and everything. That rubber flap on the bottom did the trick. The one day I removed it my temps were way up again and it wasn't even hot out.

You can buy rubber underpayment at Home Depot, look in the flooring department. It's very inexpensive, I paid $10 for a piece of it. There's also already holes on the bumper that you can use to mount, then just tuck it back behind the skid plate/guard.
 
Old Jun 8, 2024 | 12:06 PM
  #17  
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Originally Posted by MadDogBimmer89
Is the rubber flap on the bottom behind the skid plate missing?

Mine will over heat without it, I too have a separate transmission cooler, did a head gasket leak test, and everything. That rubber flap on the bottom did the trick. The one day I removed it my temps were way up again and it wasn't even hot out.

You can buy rubber underpayment at Home Depot, look in the flooring department. It's very inexpensive, I paid $10 for a piece of it. There's also already holes on the bumper that you can use to mount, then just tuck it back behind the skid plate/guard.
the rubber thing underneath the radiator yes still there and I even got like weather strip and put it up in here the radiator and fan is some people say close that gap so I did that too , I haven’t done head gasket leak test and such that’s what I am gonna do next
 
Old Jun 8, 2024 | 07:35 PM
  #18  
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Originally Posted by MadDogBimmer89
Is the rubber flap on the bottom behind the skid plate missing?

Mine will over heat without it, I too have a separate transmission cooler, did a head gasket leak test, and everything. That rubber flap on the bottom did the trick. The one day I removed it my temps were way up again and it wasn't even hot out.

You can buy rubber underpayment at Home Depot, look in the flooring department. It's very inexpensive, I paid $10 for a piece of it. There's also already holes on the bumper that you can use to mount, then just tuck it back behind the skid plate/guard.
I removed both of my shields years ago & never a problem!
"The engine "under covers" are commonly called splash guards. But that's not the most important reason they're there. They serve three purposes: 1) they help the cooling system work properly by eliminating suction turbulence under the engine compartment at higher speeds. 2) They improve aerodynamics by eliminating drag under the vehicle. 3) They keep snow, rain, and dirt off the belt and pulleys."
 
Old Jun 8, 2024 | 10:35 PM
  #19  
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Thermostat installed the correct way? Radiator cap is also new and/or good? Nothing too big in front of the condenser that blocks air like a winch, or aux trans cooler, or some wacky grill inserts?
 
Old Jun 9, 2024 | 12:33 AM
  #20  
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Originally Posted by Alpha X
Thermostat installed the correct way? Radiator cap is also new and/or good? Nothing too big in front of the condenser that blocks air like a winch, or aux trans cooler, or some wacky grill inserts?
thw only thing infront of the condenser is the trans cooler but I had that for a while, radiator and cap and all that new and no additiona grill stuff and thermostats is also new
 



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