Quote:
Originally Posted by 2021nightshade4x4
No one wants to fess up but the red coolant (OAT) causes gaskets to swell more than green (IAT) and compromises the good factory seal.
I remember just enough of high school chemistry to know that it’s just as bad to keep adding fresh coolant because the new stuff is what REACTS, old stuff is stable and has already gotten into the gaskets and expanded.
You’re doing a good thing for the COOLING system keeping fresh coolant in there, but those engine gaskets keep having a fresh supply of red that has not yet reacted with the gasket material and expanded further.
Like the old LLY GM Duramax trucks with 300k+ miles on them have heads done at least once. Usually at around 160k. The ones without head jobs were owner maintained (read: oil changes only) and left the original coolant in or just topped it up as needed.
Counterintuitive as all hell but makes sense when you think about it. A manufacturer would never advise you to NOT get something done - they have a vested interest in you getting fluid changes and the subsequent engine work thereafter.
Sent from my iPhone using Tapatalk
|
Yeah that’s not what’s happening, besides that channel on YouTube is never accurate. They literally will make up problems that aren’t common to the vehicles. Pink or green doesn’t change anything, that’s just a dye. If you want to be accurate Asian manufacturers use OAT coolant with phosphates. American auto manufacturers like to use silicates. Phosphates based on their studies wouldn’t clog passages like silicates did. OP don’t worry about blowing head gaskets. Change out your coolant and enjoy your 4Runner. Have you ever heard of electrolysis?? Not changing your coolant will pockmark the pump and other components.
