Visible proof why you need 50/50 engine coolant

[Zippaboy]

i am using pure distilled water + waterwetter only.

 

any calls for concern?

 

from the website, some of the "benefits".

 

Reduces rust, corrosion and electrolysis of all metals

Provides long term corrosion protection

Reduces cylinder head temperatures

Prevents foaming

Reduces cavitation corrosion

Complexes with hard water to reduce scale

[Qr25vet]

if i remember my textbook...its ethene glycol....

[Blacvios]

Been using waterwetter and pure distilled water on my 180K mileage car with every 20K change. Not problem with my car and the radiator. Changed out the coolant once i done the 1K servicing.

[Genie47]

Dunno about WW. I don't use WW.

[Yeobh]

Yes ethylene glycol is widely use as it's the earliest coolant available commercially. Propylene Glycol is considered rather new and it's less toxic than EG. I am just curious to find out whether new vehicles are now come equipped with PG.

[Yeobh]

Do you do the mixing or it's premixed.

[Freifeit]

yesterday i DIYed the radiator flushing.

step 1. i drained off the old coolant.

step 2. i poured in distilled water & started the engine. i noticed there were many small bubbles coming out from radiator opening (i supposed it's due to cavitation).

step 3. i drained off the distilled water.

step 4. i poured in toyota long life coolant & mixed it with 50% distilled water. i started the engine but i didn't notice any small bubbles as per step 2, except a few bigger bubbles due to air trapped inside.

based on the above observation, i can conclude that coolant can help to minimise the cavitation of water pump.

[Mcblue]

take note:

 

The coolant boiling point is also further decreased not increased by adding 50 or 70% anti freeze.

 

That why it is called anti-freeze, lower the freezing point , at the same time lower the boiling point too...

 

In hot climate like singapore should be using 30% anti freeze. 50% is for temperate countries like North America.

[Yeobh]

Antifreeze is either Ethylene Glycol or Propylene Glycol - when mix with distilled water in correct ratio it can raise the coolant boiling point and at the same time bring the freezing temp to a very low level. Insert taken from a product flyer for your perusal:

===========================================

 

*A 50/50 mixture the coolant will boil at 107 deg C (225deg F) and freeze at -37deg C (-35deg F)

* A 70/30 mixture the coolant will boil at 135 deg C (276deg F) and freeze at -64deg C (-84deg F)

* A solution with more than 70% antifreeze will give less protection.

* Pure antifreeze will freeze at -6 F

 

Note! Distilled or deionized water should be used for Ethyelene or Propylene glycol solutions. City water is often treated with chlorine, which is corrosive, and should be avoided.

 

 

=================================================

 

Hope this helps

 

PS Antifreeze besides having the ability to change boiling and freeze temp on coolant it also prevent rust formation and helps to lubricate the water pump bearing.

Edited April 12, 2009 by Yeobh

[Genie47]

50% is still for SG lah!

 

Don't be like some smart mechanic going for less. It does not work this way.. It is only above 60% where things go downhill.

 

I have said it before. In this weather of ours, the car does not even feel our ambient temperature once it is at operating temperature. All it feels is the heat created by the frictional shear from the lube and the combustion.

 

For reference, see the laws regarding boiling point here:

 

http://www.mycarforum.com/index.php?s=&amp...t&p=1426047

 

In a nutshell, BP goes up when solute concentration goes up. The reason why BP goes down when EG concentration goes too high is because now EG is the solvent and water is the solute since both are liquids. Due to water's bipolar nature, at 50% EG, water is still the solvent.

[Genie47]

Maybe we can do experiment like that science guy that made the video. We know how the cavitation is like with water. Lets get a bottle and fill it up with 50% EG coolant and slap that top really hard!

 

Then we take WW+water and do the same thing and see how good it fares.

 

 

Then we do the ultimate test and see if a series of bottles break when filled with 50% EG, WW and the "hot ambient temperature" detractors idea of 30% EG.

 

Will be fun to see.

[Marcng]

If Coolant Water Become Rusty what to do?

Tried draining out the old coolant and add it new coolant with 50/50 mixture..fews days later it still go rusty again...

[Yeobh]

The best option is to completely drain the system and flush with clean water and follow by refilling with the right coolant mixture. If the problem persists, chance there is a slight combustion leak via the cylinder head gasket into the water jacket. If you don't have the right mixture checking tool suggest you buy premix coolant.