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Vaccum line diagram or what connects to this... 700 1990

posted by  travis873o on  Thu Aug 23 14:21 CST 2012
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last visit: Wed Nov 7 12:53 CST 2012
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So can anyone provide me with a vaccum line diagram for my 1990 744ti? Or even more helpful, what connects to the small nipple on this part? https://www.fcpgroton.com/product-exec/product_id/14884/nm/1985_1992_Volvo_740_Turbo_PCV_Breather_Nipple/category_id/10

Currently mine is capped off with a rubber plug but I feel there should be a vaccum line there. If a vaccum line does go there then where does the vaccum line connect to, intake manifold? Also, how many of these are supposed to be on these volvos? Mine has 2, but the previous owner also had them connected with electric conduit so that could be wrong.








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    Vaccum line diagram or what connects to this... 700 1990

    posted by  Will740turbo on  Fri Aug 24 18:00 CST 2012
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    last visit: Wed Oct 22 16:09 CST 2014
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    There should be a vacuum diagram in the engine bay somewhere - mine is on the Passenger side strut tower. Sometimes they're on the front end of the car.

    That small nipple needs to be connected to the intake manifold (after the throttle plate) with (I think) a 5mm vacuum hose. It provides vaccum to the PCV system while the car is running at vacuum (instead of boost). The large hose running to the pre-turbo intake provides vacuum under boost.








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    Vaccum line diagram or what connects to this... 700 1990

    posted by  aleekat on  Thu Aug 23 14:59 CST 2012
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    Mine runs to the engine side of the intake manifold.
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    Post Back. That's whats makes this forum work.








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    Vaccum line diagram or what connects to this... 700 1990

    posted by  jerryc on  Thu Aug 23 14:53 CST 2012
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    last visit: Wed Oct 8 21:28 CST 2014
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    There is one of that part, per car. The small nipple should have a line that goes to the intake, between the 2-3 runners.
    Turbo cars have no flame trap.







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