1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year > 1967 Mustang

Re: Heater Control Valve Repair?

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BKnapp:
I placed a vacuum hose over the nipple, applied vacuum, and clamped the hose. It stayed closed for over an hour, so I assume I’m good. Thanks for the tip. Still need to clean the recess out, but it sure looks like hardened cork

67gta289:
So you don’t have a vacuum leak, that is good for engine performance.  Did you see the valve guys move?

BKnapp:
Yes, the gate closed...moved up,,,and stayed in that position until I released the clamp.

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