I set my timing and the timing jumps about ten degrees after I return the hose to vacuum advance. Is that normal? Second, under my where my heater core should be, I have a small hole that has a weird grommet/hose that radiator fluid leaks out of when it is pressurized. (after a test drive) What is it? Note: I changed out the heater control valve, both heater core hoses gets hot without the heater turned on, heater control valve has vacuum when not turned on.
did you get the correct...control valve? vac should hold the valve closed....some valves are open with vac on. control should be in the inlet hose.
Only if you're connecting it to full manifold vacuum. Connected to ported vacuum, the timing should only move when you open the throttle.
BTW it is leaking in the engine bay not inside the car. Was it designed to leak on the outside of the car instead of inside?
The Heater/AC box has a drain that leads to the outside of the interior (the drain can be seen on the firewall). It was designed this way so that when the evaporator sweats, the water will drain outside and not onto your floor boards. So... if the heater core develops a leak, it kinda takes advantage of that since it is also contained within the heater/ac box.
