Help with Heat Riser spring direction

Posted by Joe Santana On 2012/3/8 19:58:05

So much for adding this to an existing thread on heat risers in Post-War...so as not to start a new thread on heat risers.

Though Brian did respond, which I appreciate.

Can anyone tell me if I have my heat riser/heat control valve set up right? The engine doesn't warm up very quickly, so I suspect I have it wrong. Backwards usually looks right to me.

Looking at the photos, am I right or wrong, that if the thermostat spring is hooked as shown, the shaft will turn counter clockwise as the engine heats up?(In my photos I called the shaft the "rod.")

I found this Q-Tip by Fred Mauck in a PI newsletter Fall 2010. But while I "get" what the heat riser is supposed to do, I can't see inside the manifold. And it looks like there are 2 flaps in there. Two flaps set at like a 190 degree angle.

On the other side of the manifold currently, the counterweight itself starts at the top when cold and then can be pushed down in a counter clockwise direction.

EDIT: Now I see. The shaft on the counterweight side can't turn clockwise when the engine heats up, because the counterweight can only turn counter clockwise from its current position at the top.

So now I think the spring may be installed backwards, or I'm wrong that the shaft turns counter clockwise on the thermostat side as the spring warms.



Thanks for any suggestions, except that I shouldn't try to do this stuff.

Attach file:

---

  (130.51 KB)