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Hard Vacuum Line over valve cover 940 Turbo Where to? 900 1992

posted by  BrickDad on  Sat Oct 13 13:39 CST 2012
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last visit: Fri Oct 24 10:17 CST 2014
[RELATED]

Just noticed that the hard vacuum line that goes over the top of the engine from the intake manifold to somewhere in the turbo area had come loose and melted its end on the exhaust manifold. Where exactly does this attach? I don't see any open connections.

Brian Mee

92 945T








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    Hard Vacuum Line over valve cover 940 Turbo Where to? 900 1992

    uid 6573's pic
    posted by  javalion on  Sat Oct 13 14:53 CST 2012
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    last visit: Wed Jul 23 09:57 CST 2014
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    It attaches to the large turbo intake hose after the air mass meter on the curve going down to the turbo. Look under the upper radiator hose.

    Tom








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      Hard Vacuum Line over valve cover 940 Turbo Where to? 900 1992

      posted by  BrickDad on  Sat Oct 13 16:03 CST 2012
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      last visit: Fri Oct 24 10:17 CST 2014
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      Thanks but,

      Well, I still can't seem to find the connector. I have one large soft hose going from the turbo inlet hose over the engine to the flame trap. One medium soft hose going from mid intake manifold to the silver turbo controller body, then this hard hose which I still can't figure out that comes from the top of the intake manifold and goes ?????.

      Brian Mee








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        Hard Vacuum Line over valve cover 940 Turbo Where to? 900 1992

        uid 6573's pic
        posted by  javalion on  Sat Oct 13 18:55 CST 2012
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        last visit: Wed Jul 23 09:57 CST 2014
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        This may be of little help whereas hardknocks! would.

        My Frankenstein's monster, a 1991SE 940T has a vac line coming from the intake manifold with a T connector each with two check valves attached to two thin hard plastic vac lines. The only ones that can get near the exhaust manifold goes to the upper AC drier inlet flange on the firewall with two other vac lines, if it wasn't secured to the firewall correctly. This vac line is not turbo related.

        This monster may be different from yours since the SE is half 960 and half 940.

        Tom








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          Hard Vacuum Line over valve cover 940 Turbo Where to? 900 1992

          posted by  BrickDad on  Sat Oct 13 20:02 CST 2012
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          last visit: Fri Oct 24 10:17 CST 2014
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          Hmm. You may have something there, the climate control doesn't seem to be able to change the vents around--lack of vacuum maybe? I'll look up a complete vacuum diagram tomorrow.

          Brian Mee








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            Hard Vacuum Line over valve cover 940 Turbo Where to? 900 1992

            posted by  someone claiming to be BrickDad on  Sun Oct 14 08:39 CST 2012 [RELATED]

            Yep, that line goes to a check valve and on to the mysterious climate control system behind the dash.

            I found a picture on Turbobricks:

            http://www.threefattigers.com/Protocore/Volvo/940CheckValve.jpg

            It didn't affect the idle or anything since the end of the loose tube melted shut on the hot manifold.

            Brian Mee








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              Hard Vacuum Line over valve cover 940 Turbo Where to? 900 1992

              uid 6573's pic
              posted by  javalion on  Sun Oct 14 19:03 CST 2012
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              last visit: Wed Jul 23 09:57 CST 2014
              [RELATED]

              Without looking, that pic seems to be the same as a standard 940. My 91 SE has that lousy failure prone ACC system, with a different vac line arrangement.

              Anyway you found the issue, I hope.

              Tom







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