04 hummer 2 overheating?????

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Mar 20, 2018 | 05:03 PM

Coloh2hummer

Thread Starter

Junior Member

Joined: Mar 2018

Posts: 6

04 hummer 2 overheating?????

i have replaced the thermostat so, now where? Could it be the radiator clogged, should I back flush it? Also, the hummer doesn't have the trans cooler mod, is that something I should consider? Someone was saying to unclog the remote radiator tank???

Mar 20, 2018 | 08:30 PM

hummer_on_fumes

Senior Member

Joined: Jul 2013

Posts: 592

From: Virginia

The obvious thing to check is the coolant level. That will tell you if your radiator is leaking somewhere. Is the engine or trans overheating? Yes you should definitely put in a separate trans cooler. The oem radiator is a ticking time bomb to destroy your transmission when the fluids mix

Mar 20, 2018 | 09:56 PM

Coloh2hummer

Thread Starter

Junior Member

Joined: Mar 2018

Posts: 6

Ok, the trans temp gage is broken. I have checked the coolant numerous times and it hasent changed. Eng temp gage will go full hot if you keep going, I pulled over and turned the eng off. I checked the eng temp with an infrared temp checker and the gage is spot on! I guess I could check the trans temp with the infrared?

Mar 21, 2018 | 07:58 AM

calif phil

Senior Member

Joined: Feb 2008

Posts: 2,311

From: Kansas

What's the mileage? If over 100,000 I would buy a new quality radiator.

Mar 23, 2018 | 10:31 AM

tharber

Senior Member

Joined: Mar 2014

Posts: 495

From: Viera, FL

It could be anything from a bad water pump, bad radiator or bad gauge.

Tim

Apr 14, 2018 | 03:24 PM

Dry Heat

Member

Joined: Dec 2014

Posts: 34

From: Phoenix Az

It could be something else. Mine started overheating and went in creep mode. I found out the catalectic converter had gone bad and the whole system was shutting down.