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Old 11-28-2016, 04:51 PM   #1
TAN
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Changing antifreeze (how often)

The motor is listed at 2004. I have never changed antifreeze! Some mechanic's say I should change it an some say forget it. I am interested in what do people hear say? Thank You
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Old 11-28-2016, 05:26 PM   #2
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We bought a set of test strips for our antifreeze. It turned out that the antifreeze was no longer making the grade so we changed it. Our rig is a 2003 and we changed it 3 years ago!

Happy trails!

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Old 11-28-2016, 05:34 PM   #3
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A friend of mine was a chemist at Dow and served the auto industry.

Summary:
It is not the antifreeze that goes bad. It is the corrosion inhibitors.

When those stop being effective, you get to buy big expensive parts. If you know what chemistry your coolant used, you can get replacement materials to add. If you add the wrong material, the stuff can all turn to goo and you still have expensive repairs. So, dump the coolant, it is the cheapest fix.

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Old 11-28-2016, 05:35 PM   #4
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My question is what do you do with the old antifreeze?
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Old 11-28-2016, 05:35 PM   #5
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I say you should find another mechanic!
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Old 11-28-2016, 06:14 PM   #6
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Originally Posted by mikf View Post
My question is what do you do with the old antifreeze?

In my area the local landfill will take it and expose of it accordingly.
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Old 11-28-2016, 06:41 PM   #7
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I bought our 2002 Windsor in 2008, to my knowledge it had the original coolant. I had been using the test strips but really could tell any difference. I did install a coolant filter with the additives annually. Early last year I decided to have it tested. Bought a kit from JG Lubricants, took a sample on Monday and sent it in and got the results via email on Thursday evening. The coolant tested as if it was new, everything in spec and no sign of contamination.

Unfortunately I had road debris take out my radiator in May and had to have a complete flush and new coolant installed so I guess I'm good for another 13 years.
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Old 11-28-2016, 07:05 PM   #8
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Recommended change interval is 5 years. I do mine every 5 years in every vehicle I own. I also do brake fluid flush and refill every 5 years.
Some will say its a waste of money to do it that often. I say its a waste of money not to.
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Old 11-28-2016, 08:04 PM   #9
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The garbage company accepts the used anti-freeze in my area. It is turned with the hazmat folks.
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Old 11-29-2016, 07:35 AM   #10
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Originally Posted by chuckftboy View Post
Recommended change interval is 5 years. I do mine every 5 years in every vehicle I own. I also do brake fluid flush and refill every 5 years.
Some will say its a waste of money to do it that often. I say its a waste of money not to.
Actually it depends on the coolant. There are different change intervals for "normal" coolant and Extended Life Coolant (ELC).
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Old 11-29-2016, 07:45 AM   #11
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The motor is listed at 2004. I have never changed antifreeze! Some mechanic's say I should change it an some say forget it. I am interested in what do people hear say? Thank You

Took mine to a Petro truck stop
$ 120 , 2 hours 10 gallons red antifreeze Done including the front heater core
They did my oil change also (synthetic 10 gallons) oil filters and fuel filters (2) $200. Greased all zerks
When all done the Tech took me into the pit and I got to check underneath the MH
Very satisfied.
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Old 11-29-2016, 08:41 AM   #12
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Quote:
Originally Posted by TAN View Post
The motor is listed at 2004. I have never changed antifreeze! Some mechanic's say I should change it an some say forget it. I am interested in what do people hear say? Thank You
With the coach being a Itasca Sunova 29R it's probably built on a gas chassis but which chassis is unknown without additional info. Change intervals are prescribed by the engine manufacturer and will be listed as mileage or age for changing. I don't know the GM spec but Ford list 100,000 miles or 5 years which ever comes first then ever 3 years or 50,000 miles after the initial change.

Its listed in the back of the scheduled maintenance guide under exceptions. The exceptions also list for Class A Motorhomes to change the transmission fluid change at 30,000 miles and a brake fluid every two years.

I would change it at the next opportunity and also change the thermostat and drive belt while your at it as preventative in nature.
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Old 11-29-2016, 09:30 AM   #13
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Originally Posted by Sweetbriar View Post
I don't know the GM spec
GM claims the Dex-Cool (Coolant) has a service interval of 5 years or 150,000 miles.
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Old 11-29-2016, 05:18 PM   #14
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Quote:
Originally Posted by Sweetbriar View Post
With the coach being a Itasca Sunova 29R it's probably built on a gas chassis but which chassis is unknown without additional info. Change intervals are prescribed by the engine manufacturer and will be listed as mileage or age for changing. I don't know the GM spec but Ford list 100,000 miles or 5 years which ever comes first then ever 3 years or 50,000 miles after the initial change.

Its listed in the back of the scheduled maintenance guide under exceptions. The exceptions also list for Class A Motorhomes to change the transmission fluid change at 30,000 miles and a brake fluid every two years.

I would change it at the next opportunity and also change the thermostat and drive belt while your at it as preventative in nature.
Sweetbriar: I was confused about the 3 years 50,000 miles versus the 5 years 100,000 miles change period. I talked to the chief engine designer at Ford while at the dealer show and he said Ford uses distilled water mix in the antifreeze. Most owners uses tap water and introduce chemicals into the radiator. If you use distilled water the longer period is acceptable.
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