However, they did not bother with a coolant flush, and simply drained the coolant from below and filled in 4 litres of pink coolant. Now ideally, they should have drained the whole coolant and then refilled it with the appropriate type. Now this independent garage has all sorts of tall claims about being “specialists” in luxury cars and even has a YouTube channel. I was already worn out, so paid up and went my way without arguing.Īnyway, since he had commented that this coolant isn’t suitable for my car, I decided to take it to a nearby FNG and get the “suitable” coolant filled. They filled in about 2 litres of green coolant and commented that they have filled it for the time being, but I will have to get it replaced ASAP since this one isn’t suitable for this car. Since he had already drained all the coolant, I had no choice but to ask them to fill the coolant that was available for sale at the petrol pump. I had gone away from the car for merely 10-15 minutes to attend a phone call, and by the time I was back, I was shocked to see that the fuel pump attendant had unscrewed the drain plug and had drained all the coolant! Apparently, he had a word with my driver and they somehow, without my consent, decided that the coolant will have to be replaced! The warning disappeared after about 30 minutes, but I still didn’t want to take a chance, so I stopped at a petrol pump and waited for sometime for the car to cool down. However, I found no physical leakage, so I continued driving. I was sure that the coolant level was okay otherwise because I had it replaced at the Mercedes dealership in April 2021. Personally I'd drain, flush & fill with a known coolant but you may not have any issues, hard to tell.This is the warning for low coolant level, so I assumed that the car could possibly have hit some debris leading to a coolant leak. With some brands you'll struggle to even find on the labeling what type of corrosion protection is used, I had to contact the technical department of one company to find out. It used to be that green was IAT (old school), red was OAT but it isn't a 'given' and just to add to the confusion you now also have blue, pink, orange. 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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