Engine coolant flush? - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 33 (permalink) Old 01-30-2010, 12:30 AM Thread Starter
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Engine coolant flush?

I will be flushing out the engine coolant next month and I want to make sure this is the proper way.

I usually take the garden hose and run as much water constantly down the radiator while the engine is running with the drain plug removed.

I have done this way twice on another vehicle and I want to make sure I will not damage anything on the Commander.

I am surprised no one on the forum has talked about a coolant flush. I know we have the better (HOAT) coolant which is good for 5 years or 100,000 miles, but changing the coolant early does not hurt.

I will try and create another How to thread with better pictures .

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post #2 of 33 (permalink) Old 01-30-2010, 12:16 PM
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Buy some Prestone Super Radiator Flush and follow the directions on the bottle.


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post #3 of 33 (permalink) Old 01-30-2010, 07:46 PM
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I have been thinking of doing a coolant flush/refill but wondering is the dealer the only source for the HOAT coolant?
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post #4 of 33 (permalink) Old 01-30-2010, 08:16 PM
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No, you can get it at a regular auto store, but be sure that it meets Chrysler's standards. My advice, buy it from the dealer: its about the same price, you'll know its the right stuff, and you can usually get a discount just by asking.

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post #5 of 33 (permalink) Old 01-30-2010, 08:32 PM
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Quote:
Originally Posted by rwmorrisonjr View Post
No, you can get it at a regular auto store, but be sure that it meets Chrysler's standards. My advice, buy it from the dealer: its about the same price, you'll know its the right stuff, and you can usually get a discount just by asking.
Thank you for the quick answer so a visit to my local dealer will be on my list. I was wondering how similar/different HOAT is to Dexcool but not worth the worry to find out.
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post #6 of 33 (permalink) Old 01-30-2010, 09:33 PM Thread Starter
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Dexcool cannot be used in our vehicle.

I believe there are only 2 HOAT coolant available. One is the coolant from the dealer and the other is called Zerex G-05.

Jeep5253: The coolant should not have too much deposits so I will only be using water.

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post #7 of 33 (permalink) Old 01-31-2010, 07:34 AM
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Dexcool cannot be used in our vehicle.

I believe there are only 2 HOAT coolant available. One is the coolant from the dealer and the other is called Zerex G-05.
You are absolutely correct!




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post #8 of 33 (permalink) Old 01-31-2010, 11:33 AM Thread Starter
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According to the instructions for Prestone Super Flush, they say to fill the radiator with the solution and then tighten the radiator cap. Then turn the engine on and let it run for......

I really want to have a good stream of water flowing to remove any small deposits that might have build up over 4 years.

I guess what I am asking is it OK to keep the engine running while fresh water is following through the radiator? I am not sure if any air pockets will be going through the water pump during this process.

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post #9 of 33 (permalink) Old 01-31-2010, 11:59 AM
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If I were to do mine I would drain the radiator, refill, then run engine. How are you going to keep the system from getting too diluted during your running-flush? And where is all the fluid running off to? Are you just trying to purge the radiator, or more of the system?
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post #10 of 33 (permalink) Old 01-31-2010, 12:49 PM Thread Starter
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The draincock will be open so all of the water will drop into the 15 qt. pan.

I am glad we have a bleed screw which will help eliminate the air when it is time to refill the system.

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