bobdabuilda
17-02-2010, 09:24 PM
My wife's a4 avant has been losing coolant over the past couple of weeks so much so that I have to top up the expansion tank every 3 days or so. I can't see any obvious water leakage from the rad or pipes linking the expansion tank. One thing I notice is that the engine temp gauge stays at 60 degrees and doing the 49C trick it also shows the same temp. If I leave the car idling it will rise to 68 degrees before the electric cooling fan kicks in and cools it back down to 60 degrees. Now the electric fan shouldn't kick in until well over 90 degrees so I am guessing that the temp sensor on the rad is faulty? Also I would expect the engine to be overheating due to the coolant loss but I presume it's not because of the electric fan fault?!! I need to check if the waterpump is leaking tomorrow as there doesn't appear to be any water getting into the oil or vice versa and the exhaust gases aren't super white so am hoping the head gasket is ok....
In addition to the above I have noticed a loss of braking power, alarm beeps and indicator faults (continuous fast flashing) on several occasions this month which then just disappear! After some research on the VW threads I have come across a fault on the VW passat where the plenum chamber fills with water due to blocked drain holes under the battery compartment. I have checked my car this evening (after dark) and there is about 6inches of water in there. As the brake servo is in this compartment I presume this is the cause of my dodgy brakes and electrical problems. Should there be an official AUDI recall for this problem? My car is a W reg so perhaps they will say no. Does anyone have experience of these problems and if so what was the cause /am I right in the above assumptions?
In addition to the above I have noticed a loss of braking power, alarm beeps and indicator faults (continuous fast flashing) on several occasions this month which then just disappear! After some research on the VW threads I have come across a fault on the VW passat where the plenum chamber fills with water due to blocked drain holes under the battery compartment. I have checked my car this evening (after dark) and there is about 6inches of water in there. As the brake servo is in this compartment I presume this is the cause of my dodgy brakes and electrical problems. Should there be an official AUDI recall for this problem? My car is a W reg so perhaps they will say no. Does anyone have experience of these problems and if so what was the cause /am I right in the above assumptions?