I'm back at it - Started the motor and let it run for roughly a half hour in the garage. The temperature at the exhaust manifold reached 257F and nothing happened. I took my heat gun and pointed it at the spring and at 275 the spring wound up and pulled away from the pin, I flipped the heat riser counterweight up using a screwdriver and it stayed "open" until I removed the heat gun and then it slowly closed (dropped) back. Did the engine not reach the required temperature to operate the spring? I did not increase engine rpm to see if the heat riser would stay open, I guess I should have. I've attached photos , engine was running during my "test" . At what exhaust manifold temperature should the spring operate ??
Last edited by Dusty53; 01/03/20224:57 AM.
Ron - - Dusty53 1954 Chevy 3604 In the Gallery Forum "You can't dance with the Devil and then wonder why you're still in Hell." "They will forget what you've said, and they will forget what you have done but they will never forget the way you made them feel."
