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Re: [GMCnet] The pause that makes you heart skip [message #71009 is a reply to message #71000] Sun, 17 January 2010 07:35 Go to previous messageGo to previous message
GMCWiperMan is currently offline  GMCWiperMan   United States
Messages: 1248
Registered: December 2007
Karma:
Senior Member
Weelll, yea, you've got it right, but I think of it a little differently:

1. The running engine sucks air out of the reservoir through the check
valve in its end, which keeps the air out.

2. When turned ON, the boost pump also sucks air out of the reservoir
through another check valve.
(Gary's prompt to look at the photos reminded me that's a weird check valve:
2-way of which I use only one.)

3. Vacuum in the reservoir sucks air out of the booster through its OEM
check valve, and straight out of the tiny HVAC softball.

Ken H.

On Sat, Jan 16, 2010 at 10:28 PM, Rob Mueller <robmueller@iinet.net.au>wrote:

> Ken,
>
> No you don't need to draw the whole mess, just show the tank, the lines out
> of it; where the check valves are; and what direction they allow "vacuum to
> flow."
>
> Actually I guess you could just confirm that:
>
> 1) The check valve in the end of the tank allows "vacuum to flow" out of
> the
> tank into the intake manifold.
>
> 2) The check valve between the tank and the booster allows "vacuum to flow"
> from the tank into the booster. This is already in the booster.
>
> 3) The check valve between the vacuum pump and the tank allows "vacuum to
> flow" from the tank into the pump.
>
> Did I get guess this right?
>
>
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