I have to ask why you decided to keep using the Super Long Life (pink) vs Long Life (red). As a previous tech for Toyota, I've seen the damage done by the OAC formulation vs the old ethylene glycol. I can't tell you how many water pump internal seals I've seen prematurely leaking or radiator necks that broke off in my hand trying to get the top hose disconnected during routine service. On my wife's 2015 Corolla, first thing I did After the warranty was over was replace the pink with red. I just didn't trust the Super Long Life from what I've seen over the years since Toyota switched.
Might be a location thing but I used pink in a lot of vehicle. My family alone combined is around 10 or more Toyota’s. All running pink coolant.
Water pumps on the 4.7 seems to go around 90k. After that Replacement on pink and another 90k later. Water pump has no leaks but I replace them anyways.
Now if you are talking about 4 cylinder Toyota’s. Mainly the newer stuff. I have seen those water pumps go around 30-90k.
Can’t say I have broken any radiator necks. They do fail around the plastic and metal where it’s crimped together anywhere between 100-200k.
Highly doubt it’s the coolant but that’s based on my experience as I was a Toyota tech for a good 10 years before I got out. I still do side jobs and pink coolant is still what I use no matter how old the vehicle is. The premix is better as I don’t have to buy distill water for the red. I could use regular water but imo distill is probably what will allow the red to last longer. When I was a dealer tech we use used regular water with red when we get red coolant.
My 88 runner is on pink coolant for 10 plus years now. Had one radiator replaced but it does have 230k on the original 3.0 never opened. Family owned since new.
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