Well things are really shaping up, got it running good and starting to look pretty good too. Should be on the road in a couple weeks. My question today is with the heat riser. I bought a new spring from Chevy Duty and put it on. The valve rotates very freely, no hangups anywhere. My question is how hot does the darn thing have to get to open? I ran for 20 minutes and it is still closed, I got my torch out and put a some direct flame to it and it opened right up. Problem is it closed again in about a minute even with the engine still running, by this time for about 25 minutes and was good and hot. Sounds to me like my spring in not good or should it be even hotter to open?
