Volvo AWD S70 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 10/2000 S70 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

Air pump noise on cold days? S70

posted by  Axel on  Sun Nov 23 03:06 CST 2003
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Mar 12 06:12 CST 2007
[RELATED]

Occasionaly, just after startup there is a obvious noise which sounds
almost like a turbo spinning up. I am pretty sure it the secondary air pump
coming on as it happens briefly right after start up on cold days. Odd that it
only is noisey when it is fairly cold out. No codes throwing yet. Anyway,
has anyone else noticed this.. if so did it lead to the airpump failing.. or???

Thanks!
--
vw bus site w/ Volvo section - http://www.geocities.com/vw_bus_74/index.html








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Air pump noise on cold days? V70-XC70 1998

    posted by  Drej1 on  Mon Nov 24 07:11 CST 2003
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

    Hi, I and others posted a lot on this. THe Air pump has a really small motor that when it gets wet will fail/seize. This and the Vol_speed site has a lot of helpfull info about this. This is just a typical under-designed system to make the greenies happy!
    D~








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Air pump noise on cold days? S70

    posted by  jda2000 on  Sun Nov 23 05:03 CST 2003
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Sun Jan 1 21:27 CST 2012
    [RELATED]

    whining noise on cold morning start-ups is normal and is described in the owner's manual..
    This whining noise is the air pump injecting air into the exhaust for faster warmup, to reduce emmissions. However, this noise only lasts less than a minute.
    Persistent grumbling noise all the time, is the pump beginning to fail.
    --
    '98 v70 GLT John, Tampa Bay








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      Air pump noise on cold days? S70

      posted by  Axel on  Sun Nov 23 13:48 CST 2003
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Mon Mar 12 06:12 CST 2007
      [RELATED]

      Good.. thats kind of what I thought.. but on cold days it is a bit louder
      than usual...

      Thanks!
      --
      vw bus site w/ Volvo section - http://www.geocities.com/vw_bus_74/index.html








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        Air pump noise on cold days? V70-XC70 1998

        posted by  SamNCC on  Sun Nov 30 04:01 CST 2003
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

        HI, On very cold mornings here in the NE mine will sound too but not bad. I replaced my failed air pump last March. If your'e talking "very" cold mornings (those that would couse Ice formation) -maybe yours' has ice forming with the collected water/condensation in this pump?) I drilled some very small 3/32" holes at the bottom (plastic impeller case)to drain any moisture that usually gets there thru poor design of this system. We'll see how long it lasts now? D~







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.