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Hummer H3For 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.
do you have the original clutch fan?. The clutch will go out and the fan will still spin but not engage cooling off the engine properly or could be the water pump or air bubble in line? i have beard of burping the coolant system.
nope I'm running an electric fan now and it's doing fine. System is burped too, no air
i dont have one unfortunately but it just seems like I'll have to go this route. What are the usual places where blockages are common other than the radiator?
i dont have one unfortunately but it just seems like I'll have to go this route. What are the usual places where blockages are common other than the radiator?
Your cooling fan is junk?
I just checked my '07 system(OEM>clutch/fan, AM>radiator/tstat/ect/waterpump).
Ambient temp:78°, start and let idle until reached max temp., 20+ minutes and stopped @201° on my scanner. I checked cylinder head temp with IR and @ 201°. I checked both ends of the radiator and @ around 170°.
I increased RPM's and within a minute my scanner dropped to 192°.
On a side note, I had an issue with high temp on the gauge many years ago and replaced the ECT, no problems since, only reaches 1/2 on the gauge to this day.
Your cooling fan is junk?
I just checked my '07 system(OEM>clutch/fan, AM>radiator/tstat/ect/waterpump).
Ambient temp:78°, start and let idle until reached max temp., 20+ minutes and stopped @201° on my scanner. I checked cylinder head temp with IR and @ 201°. I checked both ends of the radiator and @ around 170°.
I increased RPM's and within a minute my scanner dropped to 192°.
On a side note, I had an issue with high temp on the gauge many years ago and replaced the ECT, no problems since, only reaches 1/2 on the gauge to this day.
Thank you so much for taking the time to test this!
Regarding the fan, i have the electric fan set to run constantly at maximum speed and it has been doing well since I've had it installed. What I'm wondering is, if the fan is going bad, would it not increase the temps at idle? I understand there's no load on the engine when idling but some effect at least? Or if not, it sure shouldn't increase when driving around since the effect of air should help keep the temps lower too?
And yesterday i tested the car on a steep mountain road that we have here in my city and the temp rose to 233°F after which the road flattened a bit and the temp started going back down. I also did another test by putting a decently powered external fan pushing air to give the effect of wind hitting the car when driving around, working along with the electric fan pulling in air and then held the RPMs at around 2500-3000, the temperature still rose gradually and I'm sure it would continue to if i kept going. I hope I made sense
Also I'm planning to change the ECT next eventhough to me it seems to be working fine since it rises and drops as i would expect it to
Thank you so much for taking the time to test this!
Regarding the fan, i have the electric fan set to run constantly at maximum speed and it has been doing well since I've had it installed. What I'm wondering is, if the fan is going bad, would it not increase the temps at idle? I understand there's no load on the engine when idling but some effect at least? Or if not, it sure shouldn't increase when driving around since the effect of air should help keep the temps lower too?
And yesterday i tested the car on a steep mountain road that we have here in my city and the temp rose to 233°F after which the road flattened a bit and the temp started going back down. I also did another test by putting a decently powered external fan pushing air to give the effect of wind hitting the car when driving around, working along with the electric fan pulling in air and then held the RPMs at around 2500-3000, the temperature still rose gradually and I'm sure it would continue to if i kept going. I hope I made sense
Also I'm planning to change the ECT next eventhough to me it seems to be working fine since it rises and drops as i would expect it to
Not a pusher fan, air needs to be pulled in, directed at the engine. Fan should INCREASE CFM off idle! Increased RPM's=Increased engine temp. I tested mine with the OEM fan and the temp immediately dropped off idle.
