My 2020 Highlander is coming up on 5 years, and I was wondering if anyone has checked their coolant for acidity/pH? I’ve read that high acidity can start to damage gaskets, especially the head gasket.
Does anyone have recommendations for a good test kit? Also, Toyota coolant is supposed to last 5 years—should I just go ahead and change it?
You can use pH test strips, something like these. If it’s already at 5 years, I’d just spend the money on a DIY flush and replace the coolant, but the strips can be educational.
For most coolants, the ideal pH range is 7.5–9.0. If it’s closer to 7 or lower, it’s getting acidic.
@Sal
Thanks! Tried opening the link, but it doesn’t seem to work for me.
@Sal
Works fine for me. Might be because you’re in CA instead of the US? Try this version: https://www.amazon.ca/Phoenix-Systems-8001-B-Determine-Automotive/dp/B01CNHJ4QI.