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Hi there, I got a blinking red temp light on (>100C) 15min after leaving the area I had my car parked (reallyyyy slope road, for about 3h). Opened the bonnet and the reservoir had a lot of pressure inside. I let it cool down a bit and removed the blue cap. I missed a lot of coolant that spilled out right after opening it (I was aware of severe burn risk). I called the tow truck and got my car parked at home. Then, I turned on the engine with the Reservoir cap off and tapped some of those large hoses to release some eventually stuck air. It took me about 15/20min with the engine running (so head gasket might be good?) to start seeing some bubbles again in the reservoir, some of them coming back from the bottom small hose. The top thin hose pours water back into the reservoir on idle so the water pump may be working properly. Also, the more I press the gas pedal, the more water it pours in. great! I repeated the entire process again, now turning on the Heater fully on 'hot' after starting to see some bubbles 15min after engine start. It immediately dropped the temp and stopped the bubbling while it was on (cap off). Some aspects I've noticed so far: Timing belt and water pump are new (1.5y) OK Thermostat was changed last week. OK Reservoir lid is free of residues. OK Coolant is new (1 week old). it was refilled after the old one came out due to high pressure inside the reservoir. OK No leaks, spills on the ground below the car, or missing coolant after every/some cycles. OK The radiator fan (the only one I'm aware of) only comes ON if AC (hot) is turned on (not idea if the same result with just the heater on hot). It's not turning on by itself at 100C when bubbling starts occurring (ac or heater off). Is this the problem? Pressing the gas pedal increases the pouring flow of coolant into the coolant reservoir. Letting the engine on idle also pours water in, at a lower flow. OK Do i need to add distilled water to the G12 when filling up the tank? This is the one I'm using, directly into the reservoir. Question: Should I close the lid while the heater is still blowing? When do I know there is no more air in the system? What procedures should I take? Any ideas? Ty!

Have done a search but cant get the answer i need. I want to replace the coolant Temperature Sensor. i need to know where it is... and what is the correct one. A picture would be ideal! like i said i have tried searching but getting nowhere. 2004 1.7 SDI reg: OE04 LLN

Does anyone know the correct Bosch number for an SDi coolant fan? The V Dub no. is 6N0 959 455E a 200/60w 2-speed as far as I can tell. The only Bosch one I've found is 0 130 107 291 which has two pins on the connector making it a single speed motor. My current fan as fitted (a Temic) has 3 pins as has the thermostatic switch on the radiator. Whilst asking, can anyone advise on the easiest way to get the fan out as it appears blocked by the top hose on the SDi?

Hi all, the coolant in my 1.0 Lupo has turned brown. I need to do a complete coolant flush but I've never done one before so can anyone help us and list the process of flushing the coolant in a 1.0 Lupo? Cheers, Luke

VW Lupo coolant cap for sale. Brand new sealed. £5 posted

thank goodness for archives had problem with engine not starting when hot and engine appeared to be flooding judging by the smell when it did start, then either stalled straightaway or revs raced on their own. so changed plugs air filter etc and was just at the point of going to garage thinking must be fuel injection problem and thats going to be expensive! when found thread re coolant temperature sensor so got one on ebay for 7.50 nothing to lose right? it did the trick amazing!!! and now running much smoother. so would like to say a big thankyou to all members who take the time to post info cheers lindylou