Engine Temperature

[Stevenblanca]

My H3 engine temperature climbs to 3/4 on the dial in traffic. Outside temp here is ussually 37 C = 98.6 F. Coolant mixture = 30 % coolant 70% water (the good kind).

I don't like constant swings in engine temperature. I would like to keep the dial permanently in the middle. My previous cars did this effortlessly.

Any suggestions? Has anyone replaced the clutched fan for an electric one?

[wpage]

Keep an eye on your coolant levels. The electric fan could effect your battery life and possibly warranty issues.

[hummer_metal]

Originally Posted by wpage

Keep an eye on your coolant levels. The electric fan could effect your battery life and possibly warranty issues.

Dump the OEM battery, get a coil battery to start. Coolant has to be 50/50, and adjusted to season that your are driving in.

If your stuck in traffic, shut off the A/C.

If your idle, the A/C can not reboot. This will send your temp dial to the sky.

Ask any soldier that has been to Iraq if they had A/C in their Hummer.

Some will say yes, that's because they were driving, not in idle. Others will say no, because they were in idle.

[hummerabia]

My '07 runs constantly up to the 3/4 mark during the Arabian summer however never gets any higher than that, and we are talking 48 degrees celcius ambient temp in town. Out in the desert it frequently tops about 55 celcius but very little relative humidity and so far have not experienced an AC shutdown owing to high engine temp.

Ran a test last year with my '06 H3 and a guy from GM in his H3 in a mad heat of 56 degrees all afternoon with the AC on with no overheating issues so I guess you can say they got it right with the cooling system.

[Matt19]

Originally Posted by hummerabia

Ran a test last year with my '06 H3 and a guy from GM in his H3 in a mad heat of 56 degrees all afternoon with the AC on with no overheating issues so I guess you can say they got it right with the cooling system.

lol 56degrees is cold! atleast it is to me

oops my mistake, your talking celsius

There's no guage reading on the Thermostat, so it is difficult to determine what the actual temperature is in the cooling system.
That said, the guage does show a very small red area at the top so it would appear to me, that anywhere but the red area would be a normal operating temperature.

When we were getting the hot humid blast of air, over the last two weeks, I was noticing my guage creeping up towards the 3/4 mark as well.
This was only while the vehicle was stopped.

Once on the move the radiator cooled things off relatively fast. the needle crept back down, and hovered just above the center.

Now with the cool weather the rain brought, everything is back to sitting in the middle.

[marin8703]

Originally Posted by hummer_metal

If your stuck in traffic, shut off the A/C.

Are you mad man? what you are advocating is suicide! Roadrage will be at an all time high. id rather my truck being 210 F than me being 210 F . warranty can cover it, but id be dead.

[Stevenblanca]

Originally Posted by NEOCON1

my 06 runs at half on the temp gauge


even when its 112* outside

your temperature gauge is defective.

[stagger_lee]

muffler bearings.

[Dave92270]

Originally Posted by Stevenblanca

My H3 engine temperature climbs to 3/4 on the dial in traffic. Outside temp here is ussually 37 C = 98.6 F. Coolant mixture = 30 % coolant 70% water (the good kind).

I don't like constant swings in engine temperature. I would like to keep the dial permanently in the middle. My previous cars did this effortlessly.

Any suggestions? Has anyone replaced the clutched fan for an electric one?

Interesting...I have the same experience - on very hot days my needle sometimes gets to 3/4 dial as well; I also wonder whether is it normal. My previous cars used to have pretty much stable readout with only slight increase. Maybe the H3 dial is just more sensitive then other vehicles, more responsive?

[Viet Nam Vette]

Mines never gone to 3/4 (2007). It has moved slightly over 1/2 and or between 1/2 and 3/4 on very hot days.

Also..haven't checked the manual.. but I think your mixture should be ...50%/50%. The Anti-Frezz is also a coolant.

[Gunner_45]

A lot of people are wondering about operating temps. This is the
3rd forum I've seen it on this week. (I'm a whore and I know it)

My factory gauge does the same...1/2 to 3/4.....

My Scan Gage II however, shows the actual coolant temp to be in the 190 to 210 range.

210 came at 16:00 hours, 97 degrees ambient temp, stuck on I-20 in a traffic jam with A/C set on Antarctic.

Factory gauge was almost touching the 3/4 mark.