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Start up noise for about 90 seconds (45k): oil pump? V70-XC70 1998

posted by  Velomind on  Thu Jun 12 10:48 CST 2003
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On cold starts (car not running for 2 hours +) there is a low pitched "greaseless bearing" type noise coming from t-belt area. Noise is present for about 90 seconds after start up, grows in pitch with rpm's and makes a elevated pitch exit as a last comment. Does not return until next cold start. Had volvo specific mechanics listen; they replaced t-belt tensioner pulley & t-belt. Did not fix. Next they noticed t-belt taught after engine off but slack after 2 hours sitting . Replaced t-belt tensioner ram (holds pressure on t-belt) but noise still present. No other symptoms to reference. Phoenix Volvo dealer chased similar noise on 98 XC with 40k+ for 30 days until finally found metallic scraping noise (not sure if that's same) coming from oil pump. Replaced, noise gone. Dealer had 3 more 98's come in with similar problem.

Help! I'm tired of paying for repairs not needed. My mechanic will split labor on oil pump - just don't want to if I don't have to.








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    Start up noise for about 90 seconds (45k): oil pump? V70-XC70 1998

    posted by  jda2000 on  Fri Jun 13 07:21 CST 2003
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    last visit: Sun Jan 1 21:27 CST 2012
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    sounds like the moaning from the air pump. It happens when engine is cold, lasts about 2 min until engine warms up. The noise is from the air pump, blowing air into the exhaust for faster warm up(emissions control).
    This is normal, it's in your manual.
    --
    '88 240, '92 740, '98 v70 GLT John in Tampa Bay








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      Start up noise for about 90 seconds (45k): oil pump? V70-XC70 1998

      posted by  Doug G on  Sat Jun 14 03:01 CST 2003
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      last visit: Thu Mar 22 18:05 CST 2012
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      Oh boy...Airpump noise comes from under the battery tray. A mechanic should easily be able to differentiate this noise from other sources. I agree with you though, the occurrence of the noise with cold starts and duration are consistent with the airpump squeal (which I hear every morning)








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        Start up noise for about 90 seconds (45k): oil pump? V70-XC70 1998

        posted by  jda2000 on  Sat Jun 14 06:03 CST 2003
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        last visit: Sun Jan 1 21:27 CST 2012
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        Doug, I know it's weird but the moaning from the air pump in my v70 I hear it coming from the right side of the engine, not from the left front area,
        --
        '88 240, '92 740, '98 v70 GLT John in Tampa Bay







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