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I am a Toyota technician and I have seen an unusually high number of water pump leaks with the Super Long Life Coolant (the pink stuff). Camry 4 cylinder models seem particularly affected. I have seen leaks as low as 15,000 miles on the odometer. I have also changed water pumps on probably half a dozen 5.7 liter Tundras under 30,000 miles. Anybody else noticed this? Myself, I flushed that stuff out as soon as I got my Tundra and installed a mixture of green coolant and distilled water. From there I will change it every 2 years of 30,000 miles. Any thoughts?
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Was getting ready to chime in with the same info. My '02 S-10 came with the pink stuff. It needed a new radiator last year and when I requested the pink stuff my mechanic told me that they were now off of the pink and back on the green b/c the pink was causing leaks. I've been running green for a year now and it feels great
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I too have seen way too many water pump failures with these so-called 100k coolants.
I drain/refill my radiator every two years and recommend that everyone does the same. With a shortened interval, there is no need for flushes/additives, garden hose technique, or other crazy coolant shenanigans......
Toyota pink is a great antifreeze and will keep your cooling system clean. Problems are that pump lube doesn't last indefinitely, and casting sand and metal debris will constantly be washed into and through your system. The only way to get rid of the debris is to install a filter, or change the antifreeze out regularly.
Peak Global and Zerex Asian are good substitutes for Toyota Pink and about 1/3 the cost. Both are available premixed 50:50. Peak Global is also available full strength and when you mix your own, always use distilled/deionized water.
http://www.tundratalk.net/forums/tundra-...-000-miles.html
There seem to be a pattern, unless the red to pink change coincided with cheaper batch of WPs. There is a leaking WP TSB on new corollas with a revised WP part number.