How to change Coolant?

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How to change Coolant?

Asalamu Alaikum, how are you all? My car Axio 1.5 1NZ 2007 model Radiator is leak so I am going to change radiator and coolant. I want to use Caltex Havoline coolant this time but I don't know how to do proper 50/50 mix. Please guide me how to do proper 50/50 mix, total capacity of coolant is 5.8 Liters checked on Toyota-Club.Net website as I don't have owners manual.

50/50 mix looks hard to me because of engine block and heater core how to drain all old coolant o r tap water after flushing from engine block and how to remove all water from heater core? Another question which brand Distilled water should I use?

Hassan Ali Khan asked on 21 Jul 2022 11:01:09 am

1 Answer

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Syed Muzammil - on 21 Jul 2022 11:01:43 am

flush with a garden hose pipe till water runs clear, assemble everything back, fill with distilled o r RO water, start engine, let it run and then drain out, repeat once more. This will have diluted and removed almost 95% of the tap water.

Then fill 2.9 litres of coolant concentrate in system and top up rest with RO/Distilled water - You will end up with a 50% mixture of coolant mixed with distilled/RO water.