Coolant change

2015 TOYOTA RAV4
90,000 MILES • 4 CYL • AUTOMATIC
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JERSEYGUY19
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Hi, going to do a coolant change. So after doing the flush with distilled water do I refill the radiator with full concentrate coolant or 50/50? Will there be water left in the engine to just use the full concentrate instead of the 50/50? Thanks. Michael
Mar 31, 2021 at 3:40 AM
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ASEMASTER6371
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Good morning,

Use a 50-50 mix. All coolants today require this for their system for maximum protection.

I attached a guide for flushing the system as well as the actual procedure for you for your vehicle as well.

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

Roy
Mar 31, 2021 at 4:44 AM
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JERSEYGUY19
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I’m sorry, but since I can’t get all of the water out of the engine when I’m running the water through everything I hear that to use straight coolant not 50/50 because there is left over water still in the engine block.. so the left over water that I couldn’t get out of the engine cause I’m just draining only the water and old coolant through the radiator pet cock will mix with the concentrate coolant that is left over in engine.. right or wrong? Thanks again, Michael
Mar 31, 2021 at 7:04 AM
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ASEMASTER6371
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Do not worry about the remaining water in the block. It will make a small difference in temperature protection.

I would not run full strength at all. Only use 50-50.

Roy
Mar 31, 2021 at 7:12 AM
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JERSEYGUY19
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Oh okay, thank you very much. in other words don’t look or try to look for a engine drain plug I don’t even know if there is one is there? So 50/50 in reservoir until it’s full, correct? I appreciate you helping me out. Mike
Mar 31, 2021 at 7:16 AM
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ASEMASTER6371
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There is one but it takes a while to find it moving things out of the way to get access.

Yes, the system uses 50-50 for the entire cooling system.

You are welcome.

Always glad to help.

Roy
Mar 31, 2021 at 7:20 AM
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JERSEYGUY19
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Thanks a lot Roy you were a big help and money saver.. be safe.. Mike
Mar 31, 2021 at 7:22 AM
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ASEMASTER6371
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I attached a picture of the block for you. The drain will be a plug located close to the bottom of the block. I circled where it could be on each side.

Roy
Mar 31, 2021 at 7:33 AM
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JERSEYGUY19
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So don’t try to loosen them leave them alone right? I’m not really great on cars I’m just a normal home owner with two ramps for front tires. So leave them alone correct? Thanks
Mar 31, 2021 at 8:24 AM
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ASEMASTER6371
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In my opinion, yes, leave them alone.

Roy
Mar 31, 2021 at 8:37 AM
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JERSEYGUY19
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Okay, cool. thanks again. Won’t bother you anymore. lol!
Mar 31, 2021 at 8:52 AM
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ASEMASTER6371
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Never a bother.

Roy
Mar 31, 2021 at 9:03 AM