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whooooooosh sound upon starting in 745. strange. 700 1991

posted by  ChrisS on  Fri Sep 4 13:35 CST 2009
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last visit: Thu Oct 10 21:18 CST 2013
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My 1991 B230F makes the strangest sound when I start it up. It typically makes the sound only after it is warmed up to some degree (has been run within a couple of hours). It's sounds like a vacuum leak but it's quite loud, only happens when warm and is only audible when starting.

Any guesses?
--
1991 745 & 1993 965 /// RIP: 86 764T; 79 262C








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    whooooooosh sound upon starting in 745. strange. 700 1991

    posted by  VolvoSteel on  Fri Sep 4 19:30 CST 2009
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    last visit: Sun Mar 23 21:28 CST 2014
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    sounds like your main cooling fan, most of mine have made this noise upon start when hot/warm,








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      whooooooosh sound upon starting in 745. strange. 700 1991

      posted by  ChrisS on  Wed Sep 9 07:42 CST 2009
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      That certainly could be it!

      It is quite hard to pinpoint even with my head under the hood as my wife starts the car. At first, I thought it was the starter. The sound is faintly metallic, like bearings that need grease. It is quite loud - and a little embarrassing when starting it up, if I can admit it to my fellow Volvoholics.








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        whooooooosh sound upon starting in 745. strange. 700 1991

        posted by  david hunter on  Wed Sep 9 08:53 CST 2009
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        No noise after it starts even if engine is rev'd? Sometimes it is hard to pinpoint the source of a sound. Try using a flex plastic tube to your ear and point around with the other end. This can often find a sound.
        --
        David Hunter








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    whooooooosh sound upon starting in 745. strange. 700 1991

    posted by  david hunter on  Fri Sep 4 18:13 CST 2009
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    Rather than have us guess could you provide a little more info. Have you opened the hood, stuck your head in to look, listen and observe to try and trace the source. If it so loud it should be obvious.
    --
    David Hunter







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