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Mazda 3 Lover
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can someone please let me know where to dd water for coolant? for the wiper I do know but for the engine, I dont. please help me.
 

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Guys, coolant comes into 2 forms - ready for use (around -37C) and concentrate (around -60C) to which you have to add water. There is nothing wrong to add water, especially if you are in warmer climate and don't have winter. The OP is from African island, so his question is reasonable.
 

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Nothing wrong? Its not about freezing, its about boiling over. This engine runs very close to the boiling point of water, so it needs proper coolant mix to keep from overheating. The proper mix raises the boiling point of the coolant to where it will not boil over. One good overheat might cause significant damage.
Water also has lots of contaminant minerals that can corrode and scale up the inside of the cooling system, eventually clogging it up.
When all else fails, RTFM.
 

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Nothing wrong? Its not about freezing, its about boiling over. This engine runs very close to the boiling point of water, so it needs proper coolant mix to keep from overheating. The proper mix raises the boiling point of the coolant to where it will not boil over. One good overheat might cause significant damage.
Water also has lots of contaminant minerals that can corrode and scale up the inside of the cooling system, eventually clogging it up.
When all else fails, RTFM.
arathol, doesn't matter which manual you will read, the coolant mix hasn't changed much over the years. Coolant is already mixed with water. In fact coolant is somewhere between 30% to 60% of the mix in the car, the rest is water. Also there is a thing called deionized water which is free of minerals and is perfect for this case.
I'm not saying that you should run only on water, that's bad as you already said. However adding appropriate amount of water to the coolant mix won't damage anything.
 

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I use distilled water with the antifreeze coolant with a mixture of about 50/50. The distilled water goes through a distillation process which removes the minerals that can build up in the coolant system and cause problems.

To the OP, I add engine coolant via the plastic overflow bottle near the radiator. This bottle is connected to the radiator with a small hose. An alternative is to add it to the radiator itself. However, it's best to use the overflow bottle because it helps assure the radiator is properly full and keeps from losing cooling during the engine's heating / cooling cycles.
 

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'15 Mazda3
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Read your owners manual.
You don't put water in the coolant tank either.
I agree, but I will modify it a little. Never put PLAIN water in the coolant tank/radiator, no matter how little the amount. Get into the habit of using the proper mix of anti-freeze and filtered/condensed water. Each time that water is added to anti-freeze it dilutes it, changing the freeze/boiling points. It is very easy to forget that you added a little water to the coolant the last time it was low, so you add a little water again and before you know it, your coolant mix is way off from what is recommended in the owners manual. Also, with an unbalanced mix of coolant in the engine/radiator, rust and sludge will develop a lot more quickly.

Also, never put 100% anti-freeze into the engine/radiator, it can freeze or boil over. A friend of mine once did that and his block busted from freezing.

Good luck.
 
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