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vacuum leaks 700 1990

posted by  someone claiming to be flacito on  Thu Jul 11 13:52 CST 2013 [RELATED]

Took my 740 turbo wagon to the dealer for a diagnostic due to constant stalling. The test revealed the following, exhaust manifold leak, engine has a vacuum leak, engine idles low. Anyone of these repairable by me? Is this a question of gasket replacement? Not fond of dealer doing the job due to lack of big$$$.








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    vacuum leaks 700 1990

    posted by  Milanomike on  Thu Jul 11 16:24 CST 2013
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    last visit: Sat Oct 11 22:27 CST 2014
    [RELATED]

    First thing I would do is check/replace all vacuum lines on the engine. You can go to Napa and buy line in various sizes by the foot. That should help a lot. The exhaust manifold, if really leaking, is usually heard. It's a bit more pain to remove and replace gaskets, especially as 20 yr old studs might break, but it's doable. Idle may fix itself once you fix vacuum leaks. good luck.








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      vacuum leaks 700 1990

      posted by  jerryc on  Thu Jul 11 20:43 CST 2013
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      last visit: Wed Oct 8 21:28 CST 2014
      [RELATED]

      What he said. The common vac line leaks are the ones to the charcoal canister and the 'flame trap' holder elbow, which on a turbo does not actually have a flame trap in it, but the lines still leak.
      Also check all the hoses from the turbo to the intake; there are many junctions.







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