Hi all have a 1998 A3 1.6 sport with an AEH engine just done the head gasket on it and it continues to have problems... Have been running it from last Friday from start up the heaters are working (blowing hot air) but I have noticed that the bottom radiator hose to the thermostat is not even slightly warm, even though every other pipe is roasting? Also it seems when I get on a motorway and the revs are high the tempeture gauge starts to drop! and the heaters get slightly cooler. On the way up the road after about a 6 mile drive the tempeture gauge did not even move, I pull into a petrol station and open the expansion tank cap hardly even a hiss of pressure, I check the oil filler cap and it has a very shall I say fine puffy oil water mayoneisse. Put the cap back on and tempeture gauge is at 90 and heaters are working? Whats been done or replaced. New radiator New thermostat New water pump New timing belt and tensioner New head gasket and bolts G13 Coolant Head and rocker cover extensively cleaned of oil water mix from previous head gasket failure. Oil changed Head skimmed and checked for any cracks none Cylinder bores checked for any cracks clear All coolant pipes flushed cleaned and checked for blockages This is my first experience with a VW Audi and I have to say that although its easy enough to work it, it appears to be a complete pile of unreliable rubbish? Had Vauxhalls and Peugeots before and not as much hassle as this pile of junk? And a lot less tempromental and 100% more reliable What gives? I have searched forums and found people with the same problems but no clear answer except of course a head gasket, which obviously it cannot now be, any help or experiences on this would be appreciated if this doesn't work I will be giving it a viking funeral!