Hi guys, just got myself a 1994 XJ40 3.2S auto and so far it's the mutt's nuts.
The only real issue so far is that there is no heat whatsoever coming from the heater. Not a huge problem at the moment, but it needs sorting.
I've read through this forum and other online sources and I'll give you some detail in the hope the source of the problem is clear.
Firstly, the car seems to warm up OK, the temp gauge in the dash reaches halfway after a minute or two and the radiator top hose gets hot quickly too. Watched with the coolant cap off the reservoir in case there were any bubbles indicating an air lock as it warmed up but none appeared.
The blower seem to operate OK too, turn up the dial and after a couple of seconds the fan responds. (I gather a delay of a second or two is normal)
When I switch it to Demist I can hear flaps and motors moving about behind the dash, and the air comes out the windscreen vents with some force on both sides.
When I switch the Demist off I can feel lots of cold air at my feet.
But nothing I do seems to make the air warm. Tried turning the temperature dial back and forth and giving it a few minutes, the slider for the centre vents, switching it to Manual, Recirc, Demist etc, but nothing.
I found the heater valve under #6 inlet manifold pipe but apart from verifying there's a vacuum from the pipe when the temp dial is set to Cold and none discernible when it's set to Hot, and giving it a light tap with the wooden end of a small hammer I can't get near it, or even see it to try and find where the little actuating arm is to try and free it up. These must be an absolute pain to replace?
Apologies for nicking someone else's photo I found on this site, I tried taking one myself but the results were crap, but I did notice the hose that can be seen (that disappears behind the bulkhead, does it go to the heater?) here got warm , but the one below it is still cold, if that sheds any light on things.
Any suggestions as to what I can try next?