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  1. Has anyone used Prestone coolant for Toyota?

    General Discussion
    Hello is300 fam, forgive me if this has previously discussed, I searched high and low for an existing discussion on the issue. The "prestone toyota longer life 50/50" mix is much more convenient for me to get my hands on and much more affordable than the toyota made product. Anyone have any...
  2. What is the hole next to the ECT on my IS300

    Basic Help & Repair
    Hi, I have a strange problem. Back in 2016 I removed the engine from my is300 and it has sat there for 3 years, anyway I've put it back in and got it working except there is a problem. Next to the Coolant temp sensor on the side of the head there is another threaded hole that I only noticed when...