I was wondering if all the vacuum lines were interconnected so that if one part fails or leaks(lets say headlights) then the other parts of the system also fail(like the a/c door actuators) or are they all independant of each other and can be fixed individually.Also, is there areason there has to be a vacuum door to open the air to theinterior or can theyjust be forced open all the time as a temporary fix.
Thanks in advance. I am trying to make my final decision on a certain car.
B

 

Vacuum is vacuum, and it all comes from the intake. IMO, a leak in one system will, to some degree, affect all other vacuum systems.
You can bypass any one of these systems and operate them manually, but be prepared to scrape a knuckle or two.

 

I had both seals blown on my headlight accuators on my 79 and all my other vacuum draw assessories still worked fine. So I think even though it all comes from the intake vacuum they are still seperate it some ways

 

Good point. Now that you mention it, each system does have it's own valve to operate independently. So, what do I know? This old age thing kinda limits my thinkin' processes some times.
Uh,.....what was the question?