CLK200 Coolant change at 15 years questions .

[Wighty]

I have an MB Blue coolant concentrate container in the garage (you can’t buy them anymore ) . It’s big enough to do the CLK coolant change with a 1:1 water mix .
My questions are

Can I use tap water as the 1:1 mix ?

I know that if I drain the coolant from the base of the radiator I won’t get it all out (maybe 50%?) and I will then have to keep refilling with water and running the car until it eventually runs clear ? Would MB actually do this , it seems like a lot of time to do this ?

When it runs clear and I drain for the last time assuming there is 50% water in the engine still , should I just add concentrate based on the amount of volume I first drained ? (Taking into account what the total volume of the coolant system is )

Any advice appreciated.

 

[mioba]

wash it through with hose.

Add some of that coolant system cleaner

Use posh water for a rinse.

When its only got clean posh water in. drain as much off. Add the neat coolant based on the volume. Then top off the rest with posh water. then the conc will be correct.

Will take about 5 fills / flushes to get it clear. Note you need to get the car to temp each time.

Its a long job to do properly and best for a nice day as you will get wet.

Don't use tap water in the mix. its the minerals that solidify.


hope it makes sense.

 

[Wighty]

wash it through with hose.

Add some of that coolant system cleaner

Use posh water for a rinse.

When its only got clean posh water in. drain as much off. Add the neat coolant based on the volume. Then top off the rest with posh water. then the conc will be correct.

Will take about 5 fills / flushes to get it clear. Note you need to get the car to temp each time.

Its a long job to do properly and best for a nice day as you will get wet.

Don't use tap water in the mix. its the minerals that solidify.


hope it makes sense.

Cheers buddy , that’s great .
Is “posh water” deionised water or distilled water ?
I was hoping that tap water filtered through 9 of my fellow humans would have been suitable

 

[Larkone]

It was likely filled with 'tap water' at new and ran for 15 years without issue. If you flush it and use tap water do you really think that will be an issue over the next 15 years, that is if the electrickery brigade let you keep it that long

 

[EmilysDad]

......

Don't use tap water in the mix. its the minerals that solidify.


.....

none of that horrible suvvern or east coast hard water up here, scaling up kettles etc ..... our soft tap water is straight from the Lakes. I've used it in cooling systems for years.



but the supermarkets are still full of bottled water! ??????????

 

[Oldspanners]

In another 15 years it may well be someone else's problem

 

[Wighty]

In another 15 years it may well be someone else's problem

Let’s hope it’s a lot sooner than that buddy

 

[onefortheroad]

Cheers buddy , that’s great .
Is “posh water” deionised water or distilled water ?
I was hoping that tap water filtered through 9 of my fellow humans would have been suitable

Mayswell use ad blue that's proper taking the p*SS.