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Vacuum line coming from ball near canister?

Old 11-09-2018, 01:08 AM
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Mike Crook
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Default Vacuum line coming from ball near canister?

Bought my first corvette a few weeks back. 85 automatic. It sat for a long time so Iíve been working on it, fuel system mainly. Anyways Iíve got a vaccum line that I donít remember removing (actually looks broken) and I canít find itís home for some reason. It runs from the ball way up front drivers side, runs into a T, and then heads over or behind distributer to passenger side somewheres. Sorry for the amateur question it irritates me I canít find it 😂. Thanks in advance for any help!

PS tried to add photos but they wonít upload, maybe I need another help forum for that.


Last edited by Mike Crook; 11-09-2018 at 01:12 AM.
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Old 11-09-2018, 02:13 AM
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Joe C
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i think I've got you covered. the vacuum line off the "ball" (which is actually an accumulator for the cruise control/HVAC systems) goes to a "tee" located somewhere around, and below your master cylinder. from the "tee" one line goes to the cruise control servo, and the vacuum line in question, routes behind the engine, along the firewall, and connects to a 2-way vacuum check valve off your the engine's plenum (RH side, and vacuum source). the other port of the check valve goes thru the firewall, and connects to your HVAC control panel. here's a shot of the 2-way vacuum check valve --




hope this helps.

Last edited by Joe C; 11-09-2018 at 07:13 AM.
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Old 11-09-2018, 09:30 AM
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playsdixie
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welcome...I think Joe C's nailed it for you. lots of guys with 85's here. Quite a few new ones too....
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Old 11-09-2018, 09:51 PM
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Mike Crook
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Originally Posted by Joe C View Post
i think I've got you covered. the vacuum line off the "ball" (which is actually an accumulator for the cruise control/HVAC systems) goes to a "tee" located somewhere around, and below your master cylinder. from the "tee" one line goes to the cruise control servo, and the vacuum line in question, routes behind the engine, along the firewall, and connects to a 2-way vacuum check valve off your the engine's plenum (RH side, and vacuum source). the other port of the check valve goes thru the firewall, and connects to your HVAC control panel. here's a shot of the 2-way vacuum check valve --




hope this helps.

thatís the one, thanks! Iíll pop that sucker in when I get home! 😀
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