My truck has a heat riser valve that moves freely and seems to open when it's supposed to.
I haven't experienced problems that can be attributed to this device. However, I generally remove them or disable them on all cars I own due to the possibility of sticking closed or partly closed.
Anyway, I assume that the default position is closed and that unhooking the spring from its post will allow the counterweight to keep the valve in the open position at all times.
I live in Atlanta so cold weather warm-ups aren't really a concern.
Should I leave the spring unhooked and run with the valve fully open all the time or should I leave well enough alone and leave it hooked up to open with the exhaust flow?
Last edited by Otto Skorzeny; 03/23/2022 8:32 PM.
