heat riser valve on exhaust manifold on 1934 1103

Posted by Terry Cantelo On 2009/7/1 14:30:15

Hi All,
Three questions:- Firstly what is the actual function of this valve? Secondly:- When looking at the manifold directly under the carb I have two springs. On the left hand side an expansion coil spring which connects to a bracket and the valve shaft. On the right hand side a spring which looks like a bi-metal strip connected into the main shaft and has a hooked end which is just floating about in the breeze. There is no other bracket in the area for it to hook onto. Should there be one and what does it look like?
Thirdly what effect on the running of the car with this being inoperative?
All help much appreciated
Regards
Terry