Clio S & VW T5
Ok, so I have a project - it's an overheating Clio DCi 65 which is partly made to look like a Sport.I was thinking head gasket at first; but there is definitely no water in the engine oil. The coolant in the expansion tank is dark coloured, but not oily - it kind of smells like exhaust gasses have been running though it; and when I start the car up and let it idle, the water in the coolant reservoir bubbles away quite merrily. So far, I haven't managed to get the car to overheat - the worst it does is the water in the reservoir bubbles up past the overflow and sparts bubbling out from around the reservoir cap - as I said, the water is dark, but not oily (which I would expect with a head gasket failure - am I right?)The thermostat is okay, because after about 10 minutes of idling from a completely cold start the coolant reservoir almost empties and the pipes to and from the radiator become hot.Does anyone have any suggestions as to what the problem might be, or what to try next?
