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Old 03-21-2018, 08:08 PM   #1
vaironl
 
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Slightly Low Coolant, Should I Flush or Top It Off

Hello,

Recently my friend noticed the coolant in my Yaris was a little bit below the line LOW line, but I only have 70k miles so it is not due for a replacement. I want to fill it back to the appropriate level, but am not sure of what type/brand of coolant was put in previously. Any idea of what are the best steps I can take here to avoid any issues? I would have no problem flushing the system, but ideally would like to avoid it.
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Old 03-22-2018, 01:38 AM   #2
komichal
 
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Buy yourself a mixture with water 1:1 of G12+ (pink one) and pour it in. The brand is not that important.
For a full flush the guys here would recommend to go only with OEM Toyota coolant but if you just need to add a bit then you can use anything. I did a full flush recently and used Sheron as the Toyota stuff costs a fortune while there is no measurable difference.
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Old 03-22-2018, 05:02 AM   #3
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Quote:
Originally Posted by komichal View Post
Buy yourself a mixture with water 1:1 of G12+ (pink one) and pour it in. The brand is not that important.
For a full flush the guys here would recommend to go only with OEM Toyota coolant but if you just need to add a bit then you can use anything. I did a full flush recently and used Sheron as the Toyota stuff costs a fortune while there is no measurable difference.
Thank you for the advice, gonna get it ASAP! I did notice the Toyota coolant will cost a pretty penny!
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Old 03-22-2018, 06:44 AM   #4
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Keep in mind the cooling system in the yaris is not a sealed system so losses due to evaporation do happen. Every year you'll probably find you are down a few ounces
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Old 03-22-2018, 07:48 AM   #5
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Quote:
Originally Posted by vaironl View Post
Hello,

Recently my friend noticed the coolant in my Yaris was a little bit below the line LOW line, but I only have 70k miles so it is not due for a replacement. I want to fill it back to the appropriate level, but am not sure of what type/brand of coolant was put in previously. Any idea of what are the best steps I can take here to avoid any issues? I would have no problem flushing the system, but ideally would like to avoid it.
Check your water pump, sometimes they leak and then stop. You'll likely see a dry crusty stain, red colored.
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Old 03-22-2018, 08:44 AM   #6
vaironl
 
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Quote:
Originally Posted by tmontague View Post
Keep in mind the cooling system in the yaris is not a sealed system so losses due to evaporation do happen. Every year you'll probably find you are down a few ounces
Got it, I'll make sure to get the reservoir as close as possible to the full line.

Quote:
Originally Posted by ex-x-fire View Post
Check your water pump, sometimes they leak and then stop. You'll likely see a dry crusty stain, red colored.
Will be checking for this, thank you for pointing it out. Hopefully, it is just as tmontague said and it was due to evaporation.
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Old 03-22-2018, 09:43 AM   #7
komichal
 
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I remember once quite a gulp of coolant "disappeared" from my coolant reservoir in one week or so. I poured in some distilled water and it has not moved a bit since then. It is been on the same level over a year already. Who knows why car spitted that out before.
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Old 03-23-2018, 08:23 PM   #8
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^^^yes. top off with distilled water. it's like $0.60 a gallon.
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Old 05-23-2018, 09:20 AM   #9
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Just make sure what you put in there guys ,
mixing OAT coolant with HOAT coolant makes a reaction turning your coolant to a Jello like substance ==> big troubles getting that removed from Inside engine .
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File Type: jpg head (when mix HAOT + AOT).jpg (79.8 KB, 26 views)
File Type: jpg waterpump ( when MIX haot + aot).jpg (95.3 KB, 26 views)
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