![]() HOAT (hybrid organic additive technology) also gives a longer life. OAT (organic additive technology) gives a longer life. The old school coolant was IAT (inorganic additive technology) but only gave corrosion protection for about 3 years. So old school or modern long-life contain glycol. Most, if not all, types contain glycol because this is what gives it the anti-freeze anti-boil characteristics. Mixing types could compromise the anti-corrosion protection but you'd need to be a chemist to work out how/when/if. I'll chuck some pics of the new rig up once I get sorted out.Īs bee utey mentioned, the colour is just a dye, what you need to know is the corrosion protection type (OAT, HOAT, IAT etc.). It this an issue? should I flush and refill the system, or is 600ml in the scheme of things a minimal amount and not worth worrying about? 'Tis a '99 TD5 with approx 265,000km on it. I used a clean coke bottle to top it up, so probably put 600ml of the green glycol coolant in. My question - I gather you're not supposed to mix these, for reasons I'm not entirely sure of. ![]() Since going through the receipts for work that were provided with the vehicle, I notice that in 2016 the radiator was replaced, and refilled with red organic coolant. I was quite conscious of keeping an eye on the engine temp, as well as other bits and pieces as I didn't want to wreck it on my maiden voyage with it.Īnyhow, stopped in Charters Towers to check everything, and noticed after the engine had cooled a bit that the coolant level was a bit low, and so bought some green glycol based coolant to top it up. ![]() Bought a TD5 Defender last weekend and had quite a long drive in hot conditions to get it home from QLD to NSW. ![]()
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