Eye lid question

Hi, I have a ‘69 Cat with an eyelid problem. When sitting the eyelids stay closed for months, however when I open them w/o the engine running they won’t go back down. I replace the switch with an NOS and bought a new valve from WCCC. If it’s a leaky hose how do I know which one? Thanks

JC

What you describe is normal. After sitting a few days, there is only enough vacuum reserve to hold the lids closed, not enough to close them again once opened. You need to have the engine running to do that. If your lids stay closed for months, you don’t have a vacuum leak.

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