If your coolant is made with OAT, it doesn't turn acidic.
And the best way of knowing when to change the coolant, is indeed, the color change.
Sure this info still applies? Last time natural coolant color is green/orange. Now most coolant they got add dye, macam macam color ada. With the dye, coolant expired also still got the dye color
What happens to the coolant when it's "too late"? Can explain?
Coolant can break down and loose effectiveness. Keep in mind what coolant does,
- raise boiling temp (So water does not expand and cause too much pressure in cooling system)
- corrosion inhibitor (Different metal like aluminium and steel does not like each other. Google for battery corrosion- This has nothing to do with battery but science)
- lubrication for water pumps (If rust do get into water, it becomes sanding agent and coagulant. It could build up in rubber seals drying it out and wear out water pump seals.)
If your oil is less, then it means there is a leakage somewhere. Your oil cannot just evaporate just like that!!
Subjective nowadays for modern cars especially continentals. Some purposely make the oil evaporate or burn due to lubrication/cooling purpose for high heat/pressure components. (Especially turbocharged engine) Japanese cars like Mazda rotary engine also designed to burn oil for apex seal lubrication. Unless the engine original is not like this and only after few years gradually using engine oil for a lot example over 1L need refill for 1000km then this is excessive and need to be inspect & repair.
If your coolant is made with OAT, it doesn't turn acidic.
And the best way of knowing when to change the coolant, is indeed, the color change.
Hmmm. Not sure whether that’s really true or not. Scotty k says even hoat based Toyota gets acidic.
at 1:20, he checks the coolant pH with a test strip.
About the color change, my p2 coolant from factory day one is close to five years and still looks the same. Factory manual says to change every 2 years or 40 k( my is 120k). I’m not going to chance it and going to replace it soon. Who knows, maybe OAT based coolants trait a very long time to change color?
This post has been edited by diffyhelman2: Feb 15 2022, 01:11 PM
factory premixed coolant,.. how long change once ??
See what the coolant manufacture recommends. If cheap type 1 year once la easy. If OAT i think can tahan few years. Again see the coolant manufacturer recommendations
Hmmm. Not sure whether that’s really true or not. Scotty k says even hoat based Toyota gets acidic.
at 1:20, he checks the coolant pH with a test strip.
About the color change, my p2 coolant from factory is close to five years and still looks the same. Factory manual says to change every 2 years or 40 k( my is 120k). I’m not going to chance it and going to replace it soon. Who knows, maybe OAT based coolants trait a very long time to change color?
Subjective nowadays for modern cars especially continentals. Some purposely make the oil evaporate or burn due to lubrication/cooling purpose for high heat/pressure components. (Especially turbocharged engine) Japanese cars like Mazda rotary engine also designed to burn oil for apex seal lubrication. Unless the engine original is not like this and only after few years gradually using engine oil for a lot example over 1L need refill for 1000km then this is excessive and need to be inspect & repair.
Coolant can break down and loose effectiveness. Keep in mind what coolant does,
- raise boiling temp (So water does not expand and cause too much pressure in cooling system)
- corrosion inhibitor (Different metal like aluminium and steel does not like each other. Google for battery corrosion- This has nothing to do with battery but science)
- lubrication for water pumps (If rust do get into water, it becomes sanding agent and coagulant. It could build up in rubber seals drying it out and wear out water pump seals.)
I think for the last 2 you will be able to see the coolant change color.
QUOTE(Balanced @ Feb 15 2022, 12:46 PM)
I wonder honda type 2 coolant is what type. OAT?
Best read the owner's manual.
QUOTE(diffyhelman2 @ Feb 15 2022, 12:55 PM)
Hmmm. Not sure whether that’s really true or not. Scotty k says even hoat based Toyota gets acidic.
at 1:20, he checks the coolant pH with a test strip.
About the color change, my p2 coolant from factory day one is close to five years and still looks the same. Factory manual says to change every 2 years or 40 k( my is 120k). I’m not going to chance it and going to replace it soon. Who knows, maybe OAT based coolants trait a very long time to change color?
Depending on what type of coolant you have in there I suppose. No coolant lasts forever, but topping up coolant is something we shouldn't have to worry about. If you have to top up coolant, it usually means there's a leak somewhere. Sadly, in msia, people don't pay heed to such thing. Even when it comes to engine oil viscosity you can see mechanics blur blur on what the numbers mean. If you factory manual says to change every 2 years or 40k km, then it's best to do so, especially if they will void your warranty. Coolant is not that expensive anyway, and changing it every 2 years is nothing compared to changing engine oil every 4 months.
Feb 15 2022, 12:39 PM
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