407 heater valve

[Kevin H]

This could be what you need Canley Classics - New Catalogue - BODY AND FITTINGS - Spitfire / GT6 Heater

I mean the valve!

[David Olivant]

If your 407 is similar to my 408 try Daimler or Rover.
If you put a hose clamp on the hose meantime it would save driving in
your swimwear!
Alternatively some BL cars fitted a manual valve on the head for
isolaton.

[Nick Challacombe]

Thanks Kevin,

Tried that route but the 407/8 has two controls.
Brian does not have any and indeed does not have a clue as to which car they
came from.
I even spoke to Brian May but the state of the 407 he has just obtained for
spares is too far gone.
I will attempt to upload but will send to you I think as I am still a bit
clueless.

From a muggy 24.5C. But sunny.

Nick

[Nick Challacombe]

Photos uploaded - please see below

posted by Kevin Howard on behalf of Nick

[Kevin H]

I have a few photos (see below) of the valve on a 408 and a 411. It appears that on the 408 (green car) that there is only one cable. On the 411 that is certainly the case. So maybe the valve on the 407 was different from the later V8 cars.

Whatever you do don't undo the screws which hold the heater valve bracket to the heater box - the nuts behind are NOT retained!

Incidentally, I have just been through the parts list for the 408-410 and I can't find that valve!

Kevin

[MYTA21]

From a brief look at the photo and my 1963 Alvis TD21, the valve on the
Bristol and the Alvis look to be the same, except the Alvis valve is on
the right side . It has the flange to body and same outlet.
I believe that Red Triangle at Kenilworth may have stock - I recall they
were advertising " repros" of one models heater valve a while back
Mike O

[Kevin H]

This second cable on Nick's valve is puzzling me. I can't think why it would be required, because there's only one valve. I can only guess that they didn't use the same solid cables on the 407. The point being that the solid core control cable is able to push the valve actuator as well as pull it.

Nick, are you absolutely sure that lower cable is connected to the valve?

I have attached some detailed photos of a valve from an Aston. I suspect the internals are interchangeable. From memory I think the original one which came off my DB6 had a separate diaphragm spring, but if you take yours apart you should be able to see whether the diaphragm with the retained spring will work as a replacement in your valve body.

You might be able to buy that diaphragm separately, but even if you can't do that, you can buy the Spitfire/GT6 valve for circa £20 and just use the parts.

Let us know how you get on.

Kevin