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Author Topic: Aztek Heavy Duty Engine Cooling System  (Read 3107 times)
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« on: September 09, 2017, 07:54:21 AM »

I'm trying to figure out what exactly the Heavy Duty Engine Cooling system entails on the Pontiac Aztek. I own a 2004 Versatrak. I am about to redo the cooling system do to age and a bad leak,  but I discovered that there are two different types of radiators depending on whether or not you had the Heavy Duty Engine Cooling system option. When I look up photos to see the difference, the radiator that does NOT support the Heavy Duty Engine Cooling system has NO transmission cooler lines, but my radiator DOES. It also shows an engine oil cooler option which my Aztek does NOT have (would it be possible and beneficial to add it?) yet to me the inclusion of transmission cooler lines in the radiator would be more heavy duty than not having it. If anyone can offer more insight
 into this and what all components actually make up the Heavy Duty Engine Cooling system and whether or not it's worth the trouble to upgrade to it I would greatly appreciate it.
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« Reply #1 on: September 13, 2017, 10:37:54 AM »

2 local Dealers told me the two radiators were interchangeable when i asked.  Also, no special adapters or components were needed from going non heavy duty to heavy duty.  Thats all the info i know about it. 

2005 Aztek Fusion Orange Metallic FWD
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Any car gets great mileage when you ride your bike

« Reply #2 on: February 19, 2018, 02:04:57 AM »

I'm also replacing my worn out factory radiator, and couldn't tell much difference between regular and heavy duty cooling options.  Back in the day, heavy duty mean four core versus two, but nowadays they seem the same.

Maybe it has to do with more burly cooling fans and a bigger alternator?
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Mermaid with an Aztek

« Reply #3 on: February 19, 2018, 05:41:34 PM »

The HD cooling system is part of the towing package and also has an engine oil cooler in addition to the larger alternator.

2001 Steel Blue Metallic GT 1 of 1956 FWD blue GTs.
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