Matrix or other?

[dubber36]

I've got no heat in the car either.

Could it be as simple as the bypass valve blocked? If I take that out and run it without one, will I run the risk of an exploding matrix after time?

yes and yes. its quicker and easier to try removing the bypass valve and see if you get heat, but like you say, you run the risk of the matrix failing. You could remove the valve and try cleaning it out, soaking it in WD40 or similar, maybe a cheap place to start!

Well my hoses on the engine side of the bypass valve are red hot, the the one on the matrix side are only a bit warm. I reckon that seems like a good place to start.

[JMallows]

Just a quick Q. from looking at this website:

http://www.google.co.uk/imgres?q=mk2+golf+heater+flaps&um=1&hl=en&sa=N&rlz=1I7ADRA_en&biw=1024&bih=649&tbm=isch&tbnid=8tPttfxAOSHbBM:&imgrefurl=http://www.vwgolf-mk2.com/e1107vwgolfmk2_2.html&docid=0ZocfKYeJOxOFM&imgurl=http://www.vwgolf-mk2.com/diary/1107heater_core/0001.jpg&w=600&h=450&ei=EeihTuvaGoWX8QPn-ZnyBQ&zoom=1

click on this and you will see the flaps before and after repair hope it helps 

p.s. they can be done without taking the whole heater box out 

I have looked through the vent, and can see the metal flap, and it has the holes in it like in the pic. It doesnt look there is any perished foam on there at all, did it have foam on it from the factory?

Also, how do you do this without taking out the whole heater box?

Thanks