Re: cooling problem or air lock b6 1.9tdi –
24-11-2015,09:30 PM
+1 for water pump.
You should have flow from the headertank return pipe if the water pump is working, & the lack of pressure would also indicate pump failure.
In the winter the bottom hose not getting hot is normal in my experience with VAG PD 130 engines. Both my Bora TDi's were like that & my A4 has been the same for the past 4 winters & 60k.
B6 A4 Avant 1.9 TDI 130 Sport (6) Moro Blue, GMBH S Line Kit, Decatted, remapped to 165bhp, EGR delete, Goodyear Eagle F1 Asy's, Full Leather, Cruise Control, Bose, Audi phone prep, Cool Glove Box, Parking Sensors, Rear privacy glass.
Seat Ibiza 1.2 TSI FR 3 door Lima Green.