6.4 Coolant flush - Ford Powerstroke Diesel Forum
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Old 03-22-2011, 04:42 PM
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6.4 Coolant flush

I know that this is recommended with the 6.0 but is it something that needs to be done on the 6.4

Thanks
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Old 03-22-2011, 09:19 PM
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I think the owners manual says every 100k. Might want to check it, could be sooner - going off of memory
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Old 03-23-2011, 05:25 AM
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in a couple of months i am going to flush my cooling system with restore and restore plus and use some CAT ELC.
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Old 03-23-2011, 06:20 AM
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why is everyone using aftermarket coolant? Im approaching 100k, i was just going to use OEM stuff. I dont see any coolant breakdown at all
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Old 03-23-2011, 07:17 AM
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Quote:
Originally Posted by AW794 View Post
why is everyone using aftermarket coolant? Im approaching 100k, i was just going to use OEM stuff. I dont see any coolant breakdown at all
i have heard the ford gold stuff will eventually clog your oil cooler. That is why all the 6.0 guys switch
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Old 03-23-2011, 07:54 AM
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Any coolant can clog a cooling system if it is not taken care of.
GM has had problems with DexCool and adding tablets.
The Dexcool was not the problem, the tablets were when the cooling system cooled down. Clogged heater cores, coolers, etc.
I am not a fan of leaving anything in a vehicle for 100,000 miles.
I flushed mine around 15000 or so and added a coolant filter in the truck.
Same Zerex G05 that I used in my 6.0. Never had a oil cooler problem in that truck and dont plan on it in this truck.
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Old 03-23-2011, 08:08 AM
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have you noticed any difference with the coolant filter? Is it noticeably cleaner?
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Old 03-23-2011, 08:43 AM
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Mine was clean to start with, only 15000 on the truck when installed. The 6.0 I put one on had about 40,000 on it. It did clean up the coolant. I noticed by the stuff you can see on the sides of the degas bottle.
I think the trucks should come with them.
Depending on the mileage of your truck, I would drain the radiator, pull the plugs in the block, full with water and warm the truck up. Drain again then fill with 50/50. I just drained everything once. On the 6.0 I flushed it twice. It was dirty though, at least in my opinion. Keep the coolant clean and it wont clog anything.
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Old 03-23-2011, 09:06 AM
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the problem also is that the ford gold coolant doesnt even meet the standard CAT EC1 ratings for diesel motors.. wet sleeved motors need protection.
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Old 03-24-2011, 06:35 AM
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I thought that was done with the additives. If you want it higher add some. I am sure the larger engines require more, have not read up too much on it. I have had no problems with the 6.0 or this truck so far just using the Zerex and coolant filter. If I had problems, the way both trucks are and were used, towing 90% of the time. I would have found metal parts in the filters, broken pumps, etc.
If I am wrong enlighten me. I like learning.
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