Distilled/Deionised water

pachanga 231

Active Member
Joined
Dec 23, 2013
Messages
508
Car
E280 cdi sport 2007
Firstly whats the difference

Secondly should i be using this in the radaitor for topping up rather than tap water

Thirdly same as above for wind screen top up


Sent from my SM-G950F using Tapatalk
 

OneForTheRoad

MB Enthusiast
Joined
Apr 20, 2015
Messages
2,425
Location
uk.
Car
2015 w204 c class amg sport premium +65 ford kuga 2.0 cdi zetec awd..
you really should use mercedes ready mixed coolant, distilled water is mainly used to top up batteries .any water in the washer bottle is ok .
 

PobodY

MB Enthusiast
Joined
Aug 23, 2016
Messages
2,523
Location
Stoke-on-Trent
Car
CLK350 Sport, Nissan GTiR
A word of caution. - Because deionised water has had all the ions stripped from it, it's unexpectedly corrosive so not a great thing to add to a radiator.

Think of it this way: Tap water usually has a load of ions in it (calcium, magnesium, chloride. fluoride, etc), and although it's not saturated with them, it's a pretty stable solution. Take them all out, and there's plenty of room to pick-up more ions (such as aluminium and iron from a radiator or engine block). - Mixing a corrosion inhibitor/anti-freeze serves the additional purpose of preventing DI water from attacking the metal.
 

Trickythemerc

MB Enthusiast
SUPPORTER
Joined
Feb 1, 2015
Messages
1,249
Location
South Manchester
Car
CLK 220 CDI Sport 2009
When I did my coolant change, I used Fricofin coolant and distilled water. Tap water contains all sorts of stuff to make it drinkable, plain old H2O tastes pretty awful. The salts and minerals in tap water can and will react with different metals and alloys, the result being rust and the water turns into electrolyte which you don't really want in a cooling system. One of the reasons you need a good engine block to chassis earth is that the water/electrolyte in the system will in time start to eat the inside of a cast iron block if not properly earthed. I have seen cylinder head studs eaten away inside the block to the point of shearing off when torqued up. I refer more specifically to straight six Jaguar engines where you have a high carbon steel stud fitted to a cast block.
 
OP
OP
P

pachanga 231

Active Member
Joined
Dec 23, 2013
Messages
508
Car
E280 cdi sport 2007
Some detailed responses!
So normal tap water in both compartments lol.



Sent from my SM-G950F using Tapatalk
 

OneForTheRoad

MB Enthusiast
Joined
Apr 20, 2015
Messages
2,425
Location
uk.
Car
2015 w204 c class amg sport premium +65 ford kuga 2.0 cdi zetec awd..
proper coolant contains elements to keep it cool , you cant boil it unlike water . hence the name " summer coolant " if you want a rusty engine that runs hot then by all means put tap water in it.
 

Romeo4

Active Member
Joined
Jun 4, 2017
Messages
647
Location
Dundee/Benijofar
Car
CL500 2002.
Scottish tap water for me, you can even drink it neat. I am sure the West coast contingent on here will defend the water from Loch Katrine as I defend the supply from Lintrathen.
 

cheddar

Active Member
SUPPORTER
Joined
May 5, 2017
Messages
397
Location
Teesside
Car
CLK63 AMG, s211 E320 CDI
I bought some genuine MB coolant recently after changing my thermostat on the CLK, on the container it actually says mix at 1:1 ratio with tap water, for protection down to -37 Celsius.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top Bottom