Coolant Flush
#1
#2
Howdy!
I used Google to search for you..
Your profile shows a '16 XF S with 3.0 v6.
Although for an x350, so you'll adjust your quantities; here is a good thread as a primer..
https://www.jaguarforums.com/forum/x...79/#post184562
Keep us posted on your success!
I used Google to search for you..
Your profile shows a '16 XF S with 3.0 v6.
Although for an x350, so you'll adjust your quantities; here is a good thread as a primer..
https://www.jaguarforums.com/forum/x...79/#post184562
Keep us posted on your success!
Last edited by F1Virginia; 11-04-2020 at 07:48 AM.
#3
Why? It can't be close to being due (10 yrs/160,000 miles). Aluminum motors don't react with the coolant like iron blocks.
The following users liked this post:
Rummy636 (11-05-2020)
#4
https://www.jaguarforums.com/forum/f...4/#post2274122
Respectfully, I feel way better having my 3 year old coolant outta there last week by the Jag dealer during my annual.
Despite the owner's manual 160k interval, I can't imagine the ph balance of new vs old coolant is identical.
(Fun discussion! Like oil discussions)
3 year old coolant / 36k miles
1 day old coolant / 10 miles
Respectfully, I feel way better having my 3 year old coolant outta there last week by the Jag dealer during my annual.
Despite the owner's manual 160k interval, I can't imagine the ph balance of new vs old coolant is identical.
(Fun discussion! Like oil discussions)
3 year old coolant / 36k miles
1 day old coolant / 10 miles
#5
...Despite the owner's manual 160k interval, I can't imagine the ph balance of new vs old coolant is identical....
The following users liked this post:
F1Virginia (11-06-2020)
#6
#7
4 years and 19K miles. Never tested coolant ph nor knew if was important for Al motors. I'll test. What's the best way? From the reservoir OK? I had a MB Al engine car that I changed out the water pump at 120K miles and the coolant looked as new so I assumed it was OK and all Al motors were the same.
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#8
4 years and 19K miles. Never tested coolant ph nor knew if was important for Al motors. I'll test. What's the best way? From the reservoir OK? I had a MB Al engine car that I changed out the water pump at 120K miles and the coolant looked as new so I assumed it was OK and all Al motors were the same.
Coolant tank strip dip or turkey baster an ounce and drip onto the strip..
Given that ClubAirth & SinF disagree on the value of pre-160k change, I'm anxious to see how much pH change occurs after 4 years.
My next day off is Tuesday so I can test and post my findings. (As an aside, I was very encouraged by my Blackstone oil analysis..)
OP IkeMen, are you still with us on the thread?
If so, any progress on your flush?
#9
I meant the best way to do the test I'm assuming it makes no difference hot or cold and coolant tank is easy peasy. And as far as the pH is concerned I get different answers to ideal/acceptable when searching. Anything from 7.5 to 11. Some say the new long life coolants (usually orange) ideal is 8.5 and the old fluorescent green ideal is 9.5. and they both can drop a point and still be OK. Learned something new with this.
#10
Got the meter and did the test....... 7.86 Now, I've read "ideal" pH from 7.5 tp 11 depending on the site but shouldn't "ideal" be 7 ..... neutral? Al reacts with both acidic and alkaline solutions so why is pH> 7 listed as OK? Also, since it's in a closed system with no Fe involved and shouldn't leach out CO2 why would the pH drop at all despite being heated and cooled? Just asking, couldn't find answers.
#11
Virgin DeX-Cool starts at 8.3 pH so after 19k yours is moving toward Acidic; slightly.
Also, whereas 150k miles seems acceptable, only 5 years is recommended use duration. (See pic below)
So..
Replacing at 5 years sounds like cheap insurance.
Remember when ZF initially claimed the 5HP19's tranny fluid was "sealed for life".. And after failure publicity changed that interval to 58k miles.
5 Years or 150k.. 8.3pH initially.
Also, whereas 150k miles seems acceptable, only 5 years is recommended use duration. (See pic below)
So..
Replacing at 5 years sounds like cheap insurance.
Remember when ZF initially claimed the 5HP19's tranny fluid was "sealed for life".. And after failure publicity changed that interval to 58k miles.
5 Years or 150k.. 8.3pH initially.
#12
OK, now I'm getting too deep into this pH thing According to this web site (easy layman's terms) https://www.chardonlabs.com/resource...num-corrosion/ the ideal range of pH to keep aluminum stable in aqueous solution is 4 to 8.5. If mine dropped .64 in 4 years (assuming it started at 8.3) it would only drop to 7.2 in 10 years so 10 yr/160,000 miles seems conservative. And as far as I can tell there's no "wear" factor with coolant unless it gets contaminated (like from a steel part corroding) and the reduction in pH is more attributed to time since it's in a closed environment. Our old iron block engines turned the coolant from green to brown/black when left in too long and the heads and block were always heavily rusted and reduced the cooling so the incentive was there to change early. So if I keep it that long 10 years will be my change point. I think manufacturers recommendations are always on the far conservative side to cover heavier usage/abuse and make them more money in service (where the real money is).
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