Posted by Mile McClintock on November 04, 1999 at 19:14:44:
In Reply to: Exhaust Manifold Flap-what is it for??? posted by Mark Davis on November 04, 1999 at 19:08:57:
Heat riser. It has a summer and a winter position.At winter setting it allows heat from the exhaust manifold rise into the intake manifold to help the fuel vaporise properly.
There is a good thread on this subject on the M37 forum right now.
MM