03-04-2020, 11:08 PM
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#1
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Join Date: Sep 2010
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Anti- freeze ratios
Hey all,
I’m about to do some major services to my 99, to include water pump, timing belt, coolant flush, and finally a transmission service.
Now to my question, my former mechanic did my timing belt the last time, and when he replaced the coolant, he put in a 60:40 mix. What is everyone’s opinion on this? I live in southern Maine and we see some cold temps. We haven’t seen -34 or colder in a while. Would I be fine with 50:50 or should I do a 60:40? Is there any other differences besides freeze/ boil point?
Thanks
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99 T4R SR5. OME 906s rear.Stock front springs with 1/4" spacers and Bilstein HDs all around. B&M trans cooler. Deck plate mod and rear diff breather mod. Blacked out bumpers and graphite wheels. Cobra CB in the ashtray. Tundra 199 brake upgrade. Pioneer MVH360BT head unit.
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Recent studies have shown that aggressive therapy combined with owning Toyotas, can be affective in breaking the cycle of Jeep addicition.
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03-04-2020, 11:40 PM
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#2
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At 60 I have spent most of my life between Northern Wisconsin, UP of Michigan and Mn and never needed anything other than 50/50 and vehicles always lived out doors.
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03-05-2020, 12:06 AM
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#3
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You just saved me a minor hassle!
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99 T4R SR5. OME 906s rear.Stock front springs with 1/4" spacers and Bilstein HDs all around. B&M trans cooler. Deck plate mod and rear diff breather mod. Blacked out bumpers and graphite wheels. Cobra CB in the ashtray. Tundra 199 brake upgrade. Pioneer MVH360BT head unit.
Necessity is the mother of invention.
Recent studies have shown that aggressive therapy combined with owning Toyotas, can be affective in breaking the cycle of Jeep addicition.
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03-05-2020, 08:58 AM
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#4
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You can buy a 50/50 premix like Prestone or other brands. That way you don't need to mix it yourself. I think that's more common these days. But 50/50 in New England for sure.
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*1999 3.4L, 4wd/5spd, swapped motor and trans, heavy use DD, seasonal rust proofing using WD-40 only
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03-05-2020, 09:20 AM
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#5
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Water does a better job of sucking the heat from the engine than antifreeze (which is why you're not simply using pure antifreeze). When you reduce the water ratio, you lower the freeze point, but you also make your engine's cooling system less efficient.
Toyota Red 50 / 50 is rated to -34 degrees, fWIW.
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03-05-2020, 09:23 AM
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#6
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Walmart sells Valvoline/Zerex Toyota pink coolant pre-mixed at 50/50. That should be fine for the entire lower 48.
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03-05-2020, 09:30 AM
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#7
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Im from Central VT, I do a 60/40 ish in everything.
Id rather be safe than sorry on those -20 days.
You can also get a antifreeze tester, which will tell you the status of the antifreeze if your unsure.
Amazon.com: ABN Deluxe Antifreeze and Coolant Tester Hydrometer Tester – Automotive Antifreeze Tester for Ethylene Glycol Coolant: Automotive
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03-06-2020, 08:26 PM
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#9
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Quote:
Originally Posted by Jidaran
Water does a better job of sucking the heat from the engine than antifreeze (which is why you're not simply using pure antifreeze). When you reduce the water ratio, you lower the freeze point, but you also make your engine's cooling system less efficient.
Toyota Red 50 / 50 is rated to -34 degrees, fWIW.
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Yep, that's the gist of it. Where I live in CA it doesn't drop below 30 degrees. I do take trips up in the snow every winter but the Sierra Nevada's don't get cold so the lowest temps I've ever been in are in the teens.
For that reason I run a 40/60 mix, 40% fluid and 60% water. It keeps my engine cooler in the summer when it's 100+ degrees out. Basically, you have to look at the coldest temp you'd ever see and the hottest temp you'd ever see and make adjustments accordingly. The owners manual even has different oil recommendations based on that same principle, some climates would be better off not using 5W-30 oil.
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03-09-2020, 02:42 PM
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#10
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Quote:
Originally Posted by gamefreakgc
Yep, that's the gist of it. Where I live in CA it doesn't drop below 30 degrees. I do take trips up in the snow every winter but the Sierra Nevada's don't get cold so the lowest temps I've ever been in are in the teens.
For that reason I run a 40/60 mix, 40% fluid and 60% water. It keeps my engine cooler in the summer when it's 100+ degrees out. Basically, you have to look at the coldest temp you'd ever see and the hottest temp you'd ever see and make adjustments accordingly. The owners manual even has different oil recommendations based on that same principle, some climates would be better off not using 5W-30 oil.
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Same here - I run 40/60-ish coolant/water in my vehicles. I did have a scare years back in Mammoth when I woke up to -10*F temps one morning. Luckily, no issues!
-Charlie
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