Engine coolant change - Alfa Romeo Forum
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(Post Link) post #1 of 17 Old 31-05-10 Thread Starter
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Engine coolant change

The reason I ask this here is because my dealers aren't answering the phone, and I can't find any information through search.

The engine coolant tank on my 10 month old mito (120 petrol, 12k mileage) has reached the minimum line, is this normal for a car of this age? Should I fill it up myself and what type of engine coolant is needed? Can mixing brands of coolant cause damage?
Same question for the oil levels; can using 2 brands of oil cause any damage or does it just have to be the same type? (i.e. 5W-40)
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Paraflu Up is the name of the coolant you want. It's red coolant.

CLICK

Personally I wouldn't mix brands, no way. Especially not with oil. I use the recommended Selenia oil.

Paraflu Up is the recommended coolant in the book, and it should be mixed 50/50 with deionised water (which you can get from Tesco).

P.S - I wouldn't worry too much about the coolant being on the 'minimum' line, as it fills up the resevoir when warm. Mine is on minimum when the engine is cool, so just double-check the level next time you have a bit of a drive. It should be next to or on the 'max' line.

Last edited by Ali C; 31-05-10 at 15:59.
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It's an expansion tank, so yes the level will change... however, it has a minimum mark for a reason and although not desperately life threatening, topping the level back up is a good idea
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mine looks like it's filled with tizer! you can de-ionise tap water simply by boiling it or melting ice cubes
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it should be at max when hot, the coolant has expanded hence expansion tank and at min when cold. DO NOT overfill above max, people do!
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I wouldn't put tap water in the coolant system regardless of whether it's been boiled or frozen, it will not be properly deionised and will also still contain calcium salts which if you put enough in will start causing scale to build up.
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My 155 has done 9000 miles now and my coolant was down to the minimum level as well.
I got it topped up when I took my car to the dealer for a new gear gaiter, they just filled it up with water.
It works just fine apparently... ... ... ... ... ... ...
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If its pink, top up with paraflu UP 50/50 with DI water.

DI water is cheap and available at halfords, if you use water this time, use Paraflu the next time to keep the strength up.
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I've just realised that when the engine is warm, the coolant level sits comfortably between min and max, so I don't think it'll need topping up for a while.
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Probably wont need topping up at all!
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Quote:
Originally Posted by pookie View Post
mine looks like it's filled with tizer! you can de-ionise tap water simply by boiling it or melting ice cubes
Hi, boiling water sort of deionises it - but melting ice cubes doesn't, as ice cubes are just water, frozen, then unfrozen!

Scraping ice off a freezer compartment is fine.

Saying that, deionised water is so cheap, I'd just buy a litre bottle from halfords or a supermarket car shelf.
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De-ionised water in Batteries, okay I get that.

De-ionised water in rads. Seriously?


Okay if you're scared of scale build up, but then again pure water
is an aggressive solvent. The purer it is the more it'll eat into thing.
So it'll corrode more than "normal" water, no?
 
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Actually Nev, car water systems are classic places for galvanic corrosion with the different alloys used in cars. Hot water + Alu + Copper = mess. the additives used in 'anti-freeze' help a lot but using deionised water (this is different and cheaper than distilled) adds to the protection.

GK
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Quote:
Originally Posted by Martin Mito 1.6 View Post
Hi, boiling water sort of deionises it - but melting ice cubes doesn't, as ice cubes are just water, frozen, then unfrozen!
Doesn't boiling it just increase the concentration of the salts as the water evaporates?
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Originally Posted by Nev View Post
De-ionised water in Batteries, okay I get that.

De-ionised water in rads. Seriously?
Depends where you live, and whether you care about the inside of your radiator (and block) looking like the inside of a kettle?
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(Post Link) post #16 of 17 Old 02-06-10 Thread Starter
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Doesn't boiling it just increase the concentration of the salts as the water evaporates?
What does de-ionize water is boiling then condensing, i.e. water to gas then back into water...
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Quote:
Originally Posted by Mongoose135 View Post
What does de-ionize water is boiling then condensing, i.e. water to gas then back into water...
Well actually that's distilled water
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