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You may have a tiny leak between the water passages and the oil passages in the engine. I would also expect to see some antifreeze in the oil and on the dipstick like mayonnaise in the oil.


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If the green coolant is dexcool compatible, then there's no pressing need to switch. Most (but not all) off the shelf pre-mixed coolants are compatible with just about everything and can even be used for topping off systems full of other coolants. However, topping off a red/orange system with green will tend to make for funny brown looking coolant that ...


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The Polo has a plastic impeller on its water pump spindle which can and does break off causing a loss of water flow and overheating. The thermostat has a pin location locating it in housing. These too can break. The fan coming on -as soon as you start up- means the coolant sensor on the engine and the one on the bottom of the radiator are, one or both, are ...


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By far the most likely cause for this is, as you guessed, a head gasket leak, allowing oil to leak through to the cooling system. This often happens not long before complete failure of the head gasket and potentially major damage to the engine, so get it to a garage now for a new gasket, radiator flush, check on rad pump etc.


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Have the coolant reservoir flushed and replace it with new coolant.


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There are several things to look for here: Localize where the fluid is actually coming from. Doing this will allow you to take the next step. Ensure you put all of the hoses back in place correctly. It is easy to get one cocked in the wrong direction, where you think you go it right, but you don't. Check all of them to make sure they are completely in ...



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