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Coolant change time or mileage #4663411
02/11/18 10:40 PM
02/11/18 10:40 PM
Joined: Nov 2009
Posts: 5,123
Houston, Texas
motor_oil_madman Online content OP
motor_oil_madman  Online Content OP
Joined: Nov 2009
Posts: 5,123
Houston, Texas
I don't reach the 100,000 mile mark before 5 years. Is the pink mopar HOAT coolant done after 5 years? I changed it initially around 5 years and like 83,000 miles. I'm at 10 years and 123,000 now.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Coolant change time or mileage [Re: motor_oil_madman] #4663440
02/11/18 11:22 PM
02/11/18 11:22 PM
Joined: Apr 2017
Posts: 110
NY
Kage860 Offline
Kage860  Offline
Joined: Apr 2017
Posts: 110
NY
Generally long life coolant is good for 5 years. I figure coolant is more sensitive to time than miles per se.


2007 Jeep Liberty
Re: Coolant change time or mileage [Re: motor_oil_madman] #4663472
02/12/18 01:02 AM
02/12/18 01:02 AM
Joined: Oct 2014
Posts: 2,538
San Antonio, TX
Nyogtha Offline
Nyogtha  Offline
Joined: Oct 2014
Posts: 2,538
San Antonio, TX
I changed the factory fill orange G05 HOAT in my 2012 Ram last year when I hit the 5 year mark. I had 46K miles on the truck at that time. I want this truck to last and the price of Zerex G05 at AAP after discount code (when not on some lousy $2 off a gallon sale) isn't prohibitive IMO. I did not do any analysis on my used coolant.

I found the Mopar HOAT MS-9769 pricing to be significantly higher than Zerex G05 so I went with Zerex. It's a light gold / yellow dyed coolant but also MS-9769.

Personally I think hot weather driving in Texas beats up coolant chemistry worse / faster than cold weather driving in more northern climates. The good old Arrehnius equation.


"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen
Re: Coolant change time or mileage [Re: motor_oil_madman] #4663475
02/12/18 01:16 AM
02/12/18 01:16 AM
Joined: Mar 2016
Posts: 1,255
CA
CharlieBauer Offline
CharlieBauer  Offline
Joined: Mar 2016
Posts: 1,255
CA
Valvoline told me the life of coolant in the bottle is also 5 years.

It's a good idea to check the date code through your smartphone when picking up coolant in store.


It ain't what you don't know that gets you into trouble. It's what you know for sure that ain't so.

- mistakenly attributed to Mark Twain
Re: Coolant change time or mileage [Re: motor_oil_madman] #4663476
02/12/18 01:48 AM
02/12/18 01:48 AM
Joined: Oct 2014
Posts: 2,538
San Antonio, TX
Nyogtha Offline
Nyogtha  Offline
Joined: Oct 2014
Posts: 2,538
San Antonio, TX
The PI sheet for Zerex G05 shows a shelf life of 3 years.


https://sharena21.springcm.com/Public/Do...12-ac162d889bd1

So I always check the date code and I don't stock up too early.


"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen
Re: Coolant change time or mileage [Re: motor_oil_madman] #4663659
02/12/18 09:20 AM
02/12/18 09:20 AM
Joined: Nov 2009
Posts: 5,123
Houston, Texas
motor_oil_madman Online content OP
motor_oil_madman  Online Content OP
Joined: Nov 2009
Posts: 5,123
Houston, Texas
I notice the thermostat starts getting laggy after 5 years or so. Gets slow to warm up.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Coolant change time or mileage [Re: motor_oil_madman] #4663759
02/12/18 10:40 AM
02/12/18 10:40 AM
Joined: Dec 2017
Posts: 2,983
SE British Columbia, Canada
Snagglefoot Online content
Snagglefoot  Online Content
Joined: Dec 2017
Posts: 2,983
SE British Columbia, Canada
Every 5 years and you won’t have problems.


If you want the job done right......do it yourself.
Re: Coolant change time or mileage [Re: motor_oil_madman] #4663832
02/12/18 11:35 AM
02/12/18 11:35 AM
Joined: Jul 2013
Posts: 413
D/FW Metroplex
The_Nuke Online content
The_Nuke  Online Content
Joined: Jul 2013
Posts: 413
D/FW Metroplex
Originally Posted By: motor_oil_madman
I don't reach the 100,000 mile mark before 5 years. Is the pink mopar HOAT coolant done after 5 years? I changed it initially around 5 years and like 83,000 miles. I'm at 10 years and 123,000 now.


IMO it is best to treat the coolant life expectancy claims like the manufacturers treat their new car warranties - xx miles/x years, whichever comes first. So if the coolant sees its 5th birthday before it sees its 100,000th mile, change it.

Allowing it to go beyond 5 years in order to reach the 100K mile mark is a recipe for disaster IMO, especially considering the severe operating environment your geographical location imposes.

(My position on this subject was recently bolstered by personal experience with factory fill Mopar HOAT coolant that was allowed to go beyond the 5 year mark even though it had not yet been in service 100K miles. There were clumps of brown goo left behind in the overflow tank and what looked like sand particles filtered out of the drained coolant when transferring from drain pan to collection jug.)


2012 Charger Pursuit aka "The Bacon Hauler"
- 5.7L + NAG1 (A5) + 2.62 (215mm)
Re: Coolant change time or mileage [Re: motor_oil_madman] #4863874
09/08/18 09:43 PM
09/08/18 09:43 PM
Joined: Aug 2018
Posts: 611
N.A.
Onetor Offline
Onetor  Offline
Joined: Aug 2018
Posts: 611
N.A.
Don't forget that coolant also lubricates the Water Pump etc. So the additives need to be replenished, etc. I agree about the heat being detrimental!

Re: Coolant change time or mileage [Re: Nyogtha] #4870402
09/16/18 05:14 PM
09/16/18 05:14 PM
Joined: Oct 2014
Posts: 12,573
Idaho
CT8 Online content
CT8  Online Content
Joined: Oct 2014
Posts: 12,573
Idaho
Originally Posted by Nyogtha
The PI sheet for Zerex G05 shows a shelf life of 3 years.


https://sharena21.springcm.com/Publ...bd3/c264d227-0dbd-e711-9c12-ac162d889bd1

So I always check the date code and I don't stock up too early.
Where does it show the shelf life?


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Coolant change time or mileage [Re: motor_oil_madman] #4874274
09/21/18 12:25 AM
09/21/18 12:25 AM
Joined: Oct 2015
Posts: 2,797
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline
Joined: Oct 2015
Posts: 2,797
Balearic Islands , Spain
For me 5 years is a dream, because of the previous owner's neglect the coolant starts to turn brown after a few months on my Escort .


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.

Finnish expat in Spain.
Re: Coolant change time or mileage [Re: motor_oil_madman] #4874686
09/21/18 11:30 AM
09/21/18 11:30 AM
Joined: Aug 2010
Posts: 5,936
Champlain/Hudson Valley
Kira Online content
Kira  Online Content
Joined: Aug 2010
Posts: 5,936
Champlain/Hudson Valley
To Onetor and others:

I also believed in lubricating the water pump's bearings as an obvious necessity but was told the designs of modern water pumps is such that the bearings are isolated and coolant (or any lube you put into coolant) never touches them.

Lubricating them is impossible, they implied.

I grew up adding water pump lube to anything which had one.......I wonder if both old and new designs exist.

Re: Coolant change time or mileage [Re: Onetor] #4874721
09/21/18 11:51 AM
09/21/18 11:51 AM
Joined: Dec 2005
Posts: 10,276
Upper Midwest
kschachn Offline
kschachn  Offline
Joined: Dec 2005
Posts: 10,276
Upper Midwest
Originally Posted by Onetor
Don't forget that coolant also lubricates the Water Pump etc. So the additives need to be replenished, etc. I agree about the heat being detrimental!

Which parts are lubricated by the coolant? The water pump bearings are actually protected from the coolant by seals. Once the seal deteriorates and is breached by the coolant the bearings will destruct in short order.


1994 BMW 530i, 238K
1996 Honda Accord, 266K
1999 Toyota Sienna, 407K
2000 Toyota ECHO, 280K
Re: Coolant change time or mileage [Re: kschachn] #4879505
09/26/18 03:55 AM
09/26/18 03:55 AM
Joined: Jan 2011
Posts: 2,826
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,826
N.Ohio
Originally Posted by kschachn
Originally Posted by Onetor
Don't forget that coolant also lubricates the Water Pump etc. So the additives need to be replenished, etc. I agree about the heat being detrimental!

Which parts are lubricated by the coolant? The water pump bearings are actually protected from the coolant by seals. Once the seal deteriorates and is breached by the coolant the bearings will destruct in short order.

Correct. The pump bearings are behind a seal.


The "thinking" man's friend.
Re: Coolant change time or mileage [Re: motor_oil_madman] #4879866
09/26/18 11:55 AM
09/26/18 11:55 AM
Joined: Oct 2008
Posts: 19,196
Sunny Florida
SteveSRT8 Offline
SteveSRT8  Offline
Joined: Oct 2008
Posts: 19,196
Sunny Florida
Wait till you get some of that lubricating coolant on any accessory drives like we have in our service vans. If the tensioners and/or idlers get any real penetration by the coolant it's time for replacement in short order.


"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
4340 pounds, Street tires
Just like we go to Publix
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