TheBritishDerp Posted February 8, 2021 Report Share Posted February 8, 2021 Hey people, I'm having issues with my Arosa not heating up when I drive. I had an issue last summer where it was overheating, and the easy fix at the time was to remove the thermostat. Now in winter, having a cold car is not so comfortable, so I got a new thermostat put in. Then it started overheating again, so we did some research and found all the culprits for overheating in Lupos/Arosas. This list included: faulty thermostat, faulty water pump, airlock, and faulty radiator. We tried to bleed out any air using methods found online, some posted by supposed VW specialists, with no success. With a new thermostat that seemed to work just fine, we replaced the water pump. Still overheating. Then we gave the radiator a second, more thorough test, and learnt that the bottom half of it was gunged up. That has now been replaced, and finally it no longer overheats. However, now it will not warm up normally. We managed to get it to heat up to 90C by revving a quarter tank away, and finally blow hot air into the cabin, but on any length drive, it won't warm up. What could be wrong? Any suggestions much appretiated. Thanks Sam Quote Link to comment Share on other sites More sharing options...
LR5V Posted February 8, 2021 Report Share Posted February 8, 2021 Hard water area? If your rad was silted up, its pretty likely your heater core will be too - have you tried flushing it out with a hose? - ideally back flow Quote Link to comment Share on other sites More sharing options...
ObjectiveAway Posted February 8, 2021 Report Share Posted February 8, 2021 Lupo is easy to bleed, no need to do something special, like for some other cars. Sounds like thermostat fault, car usually stays on 70C or overheats with faulty thermostat. Mine lupo heats up to 90 in first two miles, even in winter, no need to burn another 7 liters of fuel to check if its working or not. Quote Link to comment Share on other sites More sharing options...
Skezza Posted February 14, 2021 Report Share Posted February 14, 2021 I suggest flushing with de-ionised water rather than tap water. I tend to get a couple of big bottles from Tesco, drain car, fill with de-ionised, bleed, and repeat. Leave enough for when you decide to fill with concentrate. Quote Link to comment Share on other sites More sharing options...
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