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Different sounding fan/pump after initial start-up S70 1998

posted by  414dude on  Sun Nov 1 17:16 CST 2009
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last visit: Wed May 7 19:44 CST 2014
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Klaus (and anyone else),
I've been hearing something different after I start the vehicle up (mostly when it's the first start of the day). It sounds like a pump.....I don't think it's the cooling fan though. It has a higher pitch/metallic sound to it. It seems to be located on the driver's side under the bonnet. Last week I had the infamous ABS light come on in stop & go traffic, but it extinguished itself a few hours later and hasn't come on since...even with heavy braking to ensure everything works. Could this be the ABS pump (if there is one) that I'm hearing?

Thanks,
Vinnie








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    Different sounding fan/pump after initial start-up S70 1998

    posted by  KlausC on  Mon Nov 2 05:20 CST 2009
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    last visit: Fri Oct 24 10:15 CST 2014
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    ABS pump never makes noise and I have never heard one fail yet.

    The air pump runs for the first 2 minutes or so after cold start. It is forward of the left front wheel. If you live in a humid climate, I suggest drilling two drain holes in the outer housing. One at 6 and one at 4 o'clock, 1/4 or 3/16 size will work. That will let any water drain out.

    If the noise becomes worse, the electric motor is due to be replaced/ lubed.

    Klaus
    --
    Proud owner of a 220S. If I had more room, I would have more Volvos.








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    Different sounding fan/pump after initial start-up S70 1998

    posted by  jablackburn on  Sun Nov 1 17:25 CST 2009
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    last visit: Thu Jan 20 10:56 CST 2011
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    Most likely you're hearing what's called the "secondary air injection pump", or air pump for short. The noise you're hearing is normal - it sounds rather like a leafblower or something, and it comes on for a short time when the car is started cold, or sometimes idling for a long time, to help the car produce lower emissions while the cat converter is warming up. As long as you don't have any check engine lights or screeching associated with it, then the noise is probably entirely normal.








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      Different sounding fan/pump after initial start-up S70 1998

      posted by  414dude on  Mon Nov 2 06:56 CST 2009
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      last visit: Wed May 7 19:44 CST 2014
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      No lights and no problemo's at all! This forum rocks!
      Thanks for the info guys......one of the great pleasures in being a brick owner is the on-line support from fellow bo-bo owners!








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        Different sounding fan/pump after initial start-up S70 1998

        posted by  rwisot on  Sun Nov 8 10:11 CST 2009
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        last visit: Tue Sep 2 07:50 CST 2014
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        Do all S70's have this air pump? I have never heard one running on our 2000 GLT.








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          Different sounding fan/pump after initial start-up S70 1998

          posted by  KlausC on  Sun Nov 8 10:51 CST 2009
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          last visit: Fri Oct 24 10:15 CST 2014
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          Yes, all cars do. It is part of the emmission control system. The fan is normally very quiet and only runs for a minute or two after a cold engine start.

          Klaus
          --
          Proud owner of a 220S. If I had more room, I would have more Volvos.







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