RSEscort
26-10-2011, 11:51 PM
Hi All,
I have a late 2005 A4 1.9TDI 115BHP, started blowing cold air, building excess pressure in the cooling system and using coolant, after several several checks and consultations with some others failing head gasket was diagnosed, :Blush2:I took the head off, got it pressure checked it for cracks, and had it skimmed, new gasket and bolts used (genuine Audi) rebuilt head and fitted it - car running fine, no pressure & still no heat for about 1000Km then loads of white smoke and using coolant quickly!!!:zx11: tracked it down to the exhast gas cooler on the inlet manifold :Blush2: looks like there was nothing wrong with the gasket in the first place in my book, fitted a new cooler unit (gen Audi) Engine running fine BUT still no heat :zx11::zx11: feed pipe to heater matrix piping hot but outlet pipe cold, with engine running and up to temp i have no flow in the outlet pipe, if i drive the car, leave it running and move out the pipe (top one - outlet from heater matrix)to allow air bleed out through the little bleed hole in the hose i appear to get all the air out, but no matter how many times i do it within 10 min heater is cool again and there is no flow in the pipe if i remove the hose !!!
at this stage its driving me mad --- anyone any thoughts ????:confused::confused::confused:
I should add that i fitted a new thermostat fitted before head removed, engine heats up quickly and stays at 90 all the time, never got hot nor dropped back from full operating temp once it reaches it any assistance would be greatly appreciated:approve:
I have a late 2005 A4 1.9TDI 115BHP, started blowing cold air, building excess pressure in the cooling system and using coolant, after several several checks and consultations with some others failing head gasket was diagnosed, :Blush2:I took the head off, got it pressure checked it for cracks, and had it skimmed, new gasket and bolts used (genuine Audi) rebuilt head and fitted it - car running fine, no pressure & still no heat for about 1000Km then loads of white smoke and using coolant quickly!!!:zx11: tracked it down to the exhast gas cooler on the inlet manifold :Blush2: looks like there was nothing wrong with the gasket in the first place in my book, fitted a new cooler unit (gen Audi) Engine running fine BUT still no heat :zx11::zx11: feed pipe to heater matrix piping hot but outlet pipe cold, with engine running and up to temp i have no flow in the outlet pipe, if i drive the car, leave it running and move out the pipe (top one - outlet from heater matrix)to allow air bleed out through the little bleed hole in the hose i appear to get all the air out, but no matter how many times i do it within 10 min heater is cool again and there is no flow in the pipe if i remove the hose !!!
at this stage its driving me mad --- anyone any thoughts ????:confused::confused::confused:
I should add that i fitted a new thermostat fitted before head removed, engine heats up quickly and stays at 90 all the time, never got hot nor dropped back from full operating temp once it reaches it any assistance would be greatly appreciated:approve: