Weird heating on my car...

[GazzaG60]

well i get no heat really either until its warm and im moving . stood still its hardly ever warm. coolant is full and bled. when you get moving and over a certain point it then stays warm. id expect its not flowing until the stat is open. with the weather cold i think the stat is on the verge of open and close a lot.

VW's dont have this problem. it takes a drive in a 16v to get the fans in but its warm heating. im sure we use the same matrix too.

is the heat lost in the extra pipes and rad size along with the water rail.

is it to do with the restrictor on the matrix thats bigger than a golf version (if the vw had a restricor to start with). this may help stop leaks at the matrix moreso than a vw but does it therefore restrict the heating?

[johne]

I suggest 4 reasons for poor heater performance

Matrix (partially) blocked with years of crud - there's no restrictor fitted by Audi in mine

Thermostat and water pump - covered earlier

The position on the 5 cylinder block of the heater take off. Clearly, this isn't something we can easily change but I suspect because of where it's situated relatively low down on the back of the block the flow of water isn't all it might be or as hot

John