m42 heater pipe connection

[DHFiS]

Which way round do the water hoses connect to the heater control valve?

I have changed the valve and the heater worked at first but now only blows cold. Her is a pic of it as it is.

[Brianmoooore]

Your pic. is only 135 x 180, so doesn't show much, but the hose from the back of the head goes to the lower stub, and the one to the upper stub comes from the 'tee' hose.

[DHFiS]

Thanks, this link might be a better pic

http://postimg.org/image/i654uh2nl/

[Grrrmachine]

Yep, you have the hoses the right way round. Remember that the system needs lots of bleeding, so if the heater blows cold you probably still have air in the system.

[DHFiS]

I bled it again at the rad but still no heater. Fixed it by disconnecting the top hose shown in the pic until I could see a stream of coolant then reconnecting it.

I noticed that at idle the flow was barely a trickle but a blip on the throttle and it seemed fine. Is that normal?