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post #1 of 11 (permalink) Old 11-08-2014, 05:56 PM Thread Starter
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Thermostat/Heating/Overheating

First off, I have a 06 3.7 Commander. While idling the heater blows cool air. Once I start driving the heat kicks in until I come to a stop or slow down. I noticed the bottom of the thermostat housing was leaking and I was low on antifreeze. So, I replaced both. Flushed the system for good measure, since it hasn't been done in a while.

Now, the Jeep overheats and the heater still doesn't work. On the plus side, the leak isn't there. Any advice? Bad thermostat?
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post #2 of 11 (permalink) Old 11-08-2014, 08:46 PM
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You may have a bad water pump and/or air pockets. I would check the rad after it has sit over night and top off, along with the overflow tank.


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post #3 of 11 (permalink) Old 11-08-2014, 09:25 PM Thread Starter
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Thanks for the reply. I just finished burping it and flushing out the air pockets out. Seems to be running normal. Rookie error.
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post #4 of 11 (permalink) Old 11-09-2014, 10:30 AM
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Thats good. Mine always took a few tries til it settled down back to normal.


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post #5 of 11 (permalink) Old 11-09-2014, 11:15 AM
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You did use the Chrysler HOAT from the Dealer or Zerex G-05 for the anti-freeze, correct?


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post #6 of 11 (permalink) Old 11-13-2014, 04:53 PM
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Chrysler HOAT is that the reddish / orange colored antifreeze that I see in my '07 3.7 L ?

Only had this Jeep since August 2014.
Slowly changing all fluids and lubes.

Slipped on a new set of rear brake pads this afternoon.

skip.
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post #7 of 11 (permalink) Old 11-13-2014, 07:03 PM
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Quote:
Originally Posted by skip2014 View Post
Chrysler HOAT is that the reddish / orange colored antifreeze that I see in my '07 3.7 L ?

Only had this Jeep since August 2014.
Slowly changing all fluids and lubes.

Slipped on a new set of rear brake pads this afternoon.

skip.
That might be the correct coolant. But a previous owner may have put another type of reddish orange coolant in instead. It would be a good idea to change it out with the correct coolant.

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post #8 of 11 (permalink) Old 11-13-2014, 07:14 PM
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Check your O.M., I believe the HOAT coolant is suppose to be changed at 100k miles or 5 years, which ever occurs first. So, if you have the factory fill coolant, you're overdue for new coolant anyway.

Chrysler HOAT, you have to get if from the Dealer, is Orange/Red (appears pink or red in some light). Zerex G-05 is the aftermarket equivalent that is the correct fluid to use as well (i.e. it meets chrysler HOAT specs), is amber or almost clear in color.


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post #9 of 11 (permalink) Old 11-13-2014, 07:16 PM
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I'll bet it was never changed in 90,000+ miles [don't really know. ]

The question remains --:> You did use the Chrysler HOAT from the Dealer or Zerex G-05 for the anti-freeze, [which one would you use ] to be correct and how much is required with the hot water heater in the back ?

I use to have a VW WASSERBOXER Syncro and burping is old hat.

Thanx skip.

Last edited by skip2014; 11-13-2014 at 07:22 PM.
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post #10 of 11 (permalink) Old 11-13-2014, 07:26 PM
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Originally Posted by skip2014 View Post
I'll bet it was never changed in 90,000+ miles [don't really know. ]

The question remains --:> You did use the Chrysler HOAT from the Dealer or Zerex G-05 for the anti-freeze, [which one would you use ] to be correct and how much is required with the hot water heater in the back ?

I use to have a VW WASSERBOXER Syncro and burping is old hat.

Thanx skip.
I got the Zerex.

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