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Car Forum / Volkswagen / Water Cooled Volkswagen Cars / June 2007OIL LIGHT FLASHING + BEEPS + COOOLANT LIGHT FLASHING - WHY??
Hi, today I noticed that the temp gauge was running a little hotter than usual my Golf 3 1.8. The coolant level was fine but on a later journey the oil warning light came on plus beeps and then the temp gauge flashed. Neither of these have ever come on during the 7 years I've had the car. Both the coolant level and oil levels are fine, any ideas what might be causing them to come on? thanks Coolant light flashing: Could be the water pump or thermostat. For some reason VW started to use plastic impellors in their water pumps some time around 1997. The impellor is just pushed onto the pump shaft with no key-way or any device to hold it in place. The impellor tends to fall off the shaft causing some strange problems. After a couple of minutes running the engine check the temperature of the water pipes that flow into the cabin heater radiator. They should get very hot but the main radiator pipes might feel cool. This could indicate the water pump impellor has dropped off. Oil light flashing: This sounds like you're losing oil pressure but I'm not sure why. Try to talk to a VW mechanic. > Hi, today I noticed that the temp gauge was running a little hotter > than usual my Golf 3 1.8. The coolant level was fine but on a later [quoted text clipped - 4 lines] > Both the coolant level and oil levels are fine, any ideas what might > be causing them to come on? You've brokent it, YTC. When the coolant light comes on or the oil light comes on, you stop the car and find out what's wrong. Possible options are, in no particular order: Headgasket, with oil / water mixing. Headgasket and low oil pressure for some other reason. Two dodgy sensors. Waterpump and low oil pressure. Or some sort of combination of the above. Certainly in the MK2 Golf, beeps mean a) you've got low oil pressure and b) you're revving it. If you've had it beeping for any period of time and the sensor's correct, I'd be surprised if you hadn't done proper engine damage. Maybe the voltage regulator in the instrument/clock panel. But you'd see either bright instument lights or no lights at all. Are there any other symtoms? Is the battery charge lamp behaving itself? > Maybe the voltage regulator in the instrument/clock panel. > But you'd see either bright instument lights or no lights at all. > Are there any other symtoms? > Is the battery charge lamp behaving itself? The electrics seem to behaving themsleves. Thanks for the tips I'll check out the pump impeller. I've been driving the car round today with no probs. >> Maybe the voltage regulator in the instrument/clock panel. >> But you'd see either bright instument lights or no lights at all. [quoted text clipped - 4 lines] > check out the pump impeller. I've been driving the car round today > with no probs. I know nowt about VW's in particular, but if the engine was heating up because the impellor had fallen off its shaft, then perhaps the oil is so overheated that it is thinned to the point it can't maintain a pressure. Happened to bloke with a ford engined Caterham on the way back from Le Mans a couple of years ago. Plenty of oil, Very hot engine but Rad cold. Dave >>> Maybe the voltage regulator in the instrument/clock panel. >>> But you'd see either bright instument lights or no lights at all. [quoted text clipped - 11 lines] > Mans a couple of years ago. > Plenty of oil, Very hot engine but Rad cold. It'd have to get bloody hot. I've had oil in a MK2 Golf get to > 110 on the MFA when I've been deliberately trying to heat the engine up. >>>> Maybe the voltage regulator in the instrument/clock panel. >>>> But you'd see either bright instument lights or no lights at all. [quoted text clipped - 14 lines] > It'd have to get bloody hot. I've had oil in a MK2 Golf get to > 110 on > the MFA when I've been deliberately trying to heat the engine up. It was VERY hot, it was suggested that there was an air lock in the rad pump stopped the pump circulating the water. I spat on the engine and it sizzled it was so hot, but the radiator was cold. I am not sure the temp gauge showed that things were not as they should have been. The only indication that something was 'wrong' was the oil pressure dropping to zero. Dave The guy who said your oil is thin is probably right... Has it been a long while since an oil change? That would be a great place to start as thin oil throws the pressure and sensors off. Good luck... it's probably a minor problem... The impellor may be just loose on the shaft - it might not have fallen off. When the water temperature rises the impellor starts to free wheel on the shaft so it's effectively the same as having no water pump. VW have gone back to using metal impellors in their water pumps. |
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