Guest Martin F Posted April 11, 2002 Share Posted April 11, 2002 I seem to hear differing ratio's to mix this stuff up at, some say 50\50 some say 20\80 and some say 40\60. Well today when i go to my local helpful Toyota dealer and buy 5L of the red coolant it says 'Pre-mixed' on the container. So am i paying for lots of de-ionised water as well ? Does anybody know what the best ratio is ? Link to comment Share on other sites More sharing options...
Digsy Posted April 11, 2002 Share Posted April 11, 2002 With our climate and without any other information I would go 50/50 or 40/60 if I was feeling tight that day. Doesn't the good (hand)book suggest a ratio? Pre mixed coolant? Hmmm. That's right up there with pre-grated cheese!! :-) Link to comment Share on other sites More sharing options...
Guest Martin F Posted April 11, 2002 Share Posted April 11, 2002 Handbook says 50\50, but i'm looking more for cooling capability than i am low temperature ability at this time of year. Link to comment Share on other sites More sharing options...
Digsy Posted April 11, 2002 Share Posted April 11, 2002 I think it works both ways. The more concentrated the coolant, the better it should perform in hot climates too. Its actually that I was thinking of when I was typing. I have been working on an engine for a hot climate recently. I'll double check that its the case tomorrow. Link to comment Share on other sites More sharing options...
matt Posted April 12, 2002 Share Posted April 12, 2002 The only fluid that Toyota would recommend for the soop was the pre-mixed stuff........... Try a water wetter for better cooling protection ..... Link to comment Share on other sites More sharing options...
Digsy Posted April 12, 2002 Share Posted April 12, 2002 Its official. I was talking out of my a*se. Although there is a slight improvement in cooling with increased concentrations, the concentration for hot countries is much lower (20/80). Sorry for the mis-information. Link to comment Share on other sites More sharing options...
Barry Posted April 12, 2002 Share Posted April 12, 2002 Does anyone know if the cylinder head is an ally one.? If it is, then you should never put water in the cooling system, it will corrode it eventually. Just use the premix stuff if so. Link to comment Share on other sites More sharing options...
Digsy Posted April 12, 2002 Share Posted April 12, 2002 The head is aluminium, but I think you are getting confused with magnesium, or mag-al alloys. They can't be used for long periods for parts in contact with coolant. As far as I know Ali is fine. Link to comment Share on other sites More sharing options...
Guest Martin F Posted April 12, 2002 Share Posted April 12, 2002 Quote: from Barry on 9:14 am on April 12, 2002[br]Does anyone know if the cylinder head is an ally one.? If it is, then you should never put water in the cooling system, it will corrode it eventually. Just use the premix stuff if so. The coolant does have some sort of inhibitor in it to reduce risk of corrosion. Also i would never use tap water as this would certainly increase the chance. Link to comment Share on other sites More sharing options...
Barry Posted April 12, 2002 Share Posted April 12, 2002 I not that clued up on how different metal's react, I just remember being told never to use water (tap or distilled) in a cooling system where the cylinder head is an ally one. I always used Renault's pre-mix coolant on my 5 turbo as it had an ally head, it was about £12 for 5l. Link to comment Share on other sites More sharing options...
Steve Cargill Posted April 12, 2002 Share Posted April 12, 2002 The Toyota coolant - ForLife I think it's called - also changes colour if it detects exhause gasses. e.g. BHG, I believe. Link to comment Share on other sites More sharing options...
Steve W Posted April 12, 2002 Share Posted April 12, 2002 Pre-Mix IS a mix of Anti-Freeze/"Summer Coolant" and De-Ionised Water. The very reason Toyota (and most BIKE manufacturers i.e. performance machines) only recommend pre-mix is so you're not tempted to use tap water. It's the 'coolant' which inhibits the corrosion by the water. We get LOTS of work from everyday car drivers who think Anti-Freeze is only for the winter !! The first/main item to suffer is usually the water-pump because it's cavitating the water and so causes electrolysis around it's blades/bearing/housing. WE JUST LOVE PEOPLE WHO DON'T USE ANTI-FREEZE . . ! ! [sort-of-pays for my Supra . . . .] BUT, YES, will also corrode the ally/alloy head/block/housings FAR less if reasonable amount of Coolant kept up. The main reason for not using tap-water is to prevent radiator/heater-matrix from blocking (the 'blockage' is part rust and part 'scale' or 'hardness'). De-Ionised = NO hardness. Link to comment Share on other sites More sharing options...
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