radiator: 100% water vs coolant

**badkuk** · April 15th, 2007 01:41 AM

i recently had my aux fan replaced, and have been going on test runs. this afternoon pansin ko that the temperature went slightly above the median(although malayo pa naman sa overheat). afaik, except for the overheating episodes this month, it rarely reached that temperature.

working naman ung aux and radiator fan upon checking. about the only thing i can think of is that fact that i refilled my radiator with tap water. yun kaya ang problema?

**Horsepower** · April 15th, 2007 10:56 AM

Coolant has a higher boiling point, hence, it's better than water.

**alwayz_yummy** · April 15th, 2007 11:11 AM

baka naman barado naman ang radiator mo? naoverhaul na ba(general overhaul--> top and bottom ends were removed) fush your system w/ radiator flush, the run the engine para maalis din ang mga naipong tubig sa block at naiwang radiator flush(cause of micro holes sa radiator if left inside....

never use coolant in its 100%..haluan mo ng distilled water(para di na mag-scaling), kahit 500-1000ml man lang...

**4JGtootsie** · April 15th, 2007 01:05 PM

When you open the cooling system it becomes depressurize hence it looses its ability to endure higher temperature.Once it becomes pressurized again temperature becomes stable.

Another reason maybe you filled your cooling system with water while the thermostat is closed making the system partially filled.

Using distilled water is good for the cooling system because its less prone to evaporation and cleaner then tap water.

**2Dmax** · April 15th, 2007 01:54 PM

tap water is mineral water. meaning using this kind of water in automotive cooling system is not a good idea since mineral deposits in the form of rust will be generated, resulting to corrosion..

**mbeige** · April 15th, 2007 03:36 PM

Like mentioned, ethylene glycol (antifreeze/coolant) has a higher boiling point. Get the correct one for your car not the green generic types, they won't have the stuff you need like corrosion inhibitors, etc.

You also might need to burp your cooling system, baka may air pockets. Find the highest point on your cooling system and see if you have a bolt you can loosen so that you can let the air out through it and effectively burp your car's cooling system that way.

Avoid tap water, it will have mineral content which will create deposits in the long run. You will need to use a citric acid flush after a while if you keep running like that.

**speedyfix** · April 16th, 2007 02:32 AM

check your therostat muna before putting coolant... baka pasira narin sya.

**boyscout** · April 16th, 2007 03:18 AM

wrong notion ang more coolant cooler engine. More water cooler engine, water dissipates heats better than coolant. You just basically need coolant here in the philippines to protect your cooling system from rusting. NEVER USE TAP WATER, it has mineral contents that is VERY HARMFUL and CORROSIVE in the cooling system. Distilled water (absolute, wilkins) is a must it is the purest form of water. Recommed 50:50 water:coolant, up to 70:30 ( 70% water is best in tropical country, be sure by checking your user manual first).

**badkuk** · April 16th, 2007 07:43 AM

Originally Posted by boyscout

NEVER USE TAP WATER, it has mineral contents that is VERY HARMFUL and CORROSIVE in the cooling system.

:shocked2: what have i done?!?

Originally Posted by speedyfix

check your therostat muna before putting coolant... baka pasira narin sya

um...how to check po sir?

**2Dmax** · April 16th, 2007 07:56 AM

since cooling system na lang din ang pinag-uusapan, halos lahat na yata ng vehicles na nilalabas dito sa pinas have a top and bottom portion of the radiator which are made of plastics. i thick this is because of cost-cutting. and we know that plastics are more prone to damage as compared to aluminum-made. may ideas ba kayo if saan and anong brand ung puedeng i-replace sa top/bottom portion of the radiator? my nababasa ko sa forum natin dito, EVERCOOL brand ata un..