I have a 2009 Mazda 3 with about 75k kms on the clock.
I noticed the other day when doing routine oil level check that the coolant level has dipped a little bit under the MIN mark. I don't think there is a leak or problem, probably just some evaporation over time.
I am wondering is it okay just to top up with some premade coolant or should I drain and refill ?
franc123,
Oct 6, 8:01pm
Have you got any idea how long it may have been in there for? If theres no service record for a change or a sticker under the bonnet saying it has been then chances are it's original and should be flushed and renewed. I would assume that car would have had a long life coolant in it but that generally means it has a 6-10 year life.
marte,
Oct 6, 8:42pm
#2 I agree, coolant goes bad, that's how it works. It sacrifices itself for the sake of the engine components. Flush a couple of times with distilled water & refill with the same coolant.
If you are going to a more updated coolant, flush a couple of times with rain water, or tap water, then use a coolant flush product IF the manufacturer says you can use it, use the correct one. Then flush again, & twice with distilled & then fill with new coolant & distilled.
gazzat22,
Oct 7, 4:23am
From what I,ve heard and read the coolant dilutes with age and use and the test that garages/agents do is for the concentration.
kazbanz,
Oct 7, 4:56am
As a here/now I would fill up with coolant the same color as is in there. but well worth doing a coolant change and documenting date/miles
intrade,
Oct 7, 5:49am
you need the correct coolant depending if it is actuarly a ford or a mazda engine correct factory spec coolent muste be used it can be mesured with a refractometer and with a multimeter for electrolysis. if ok can be topped up with exactly what was in there . NORTHING ELSE!
dbest,
Nov 9, 10:52am
I am pretty sure that coolant is original to the car. I think I will get it flushed and replaced to be safe.
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