FOR THE PAST WEEK THE FIRST START OF THE DAY ...

  • Tiny
  • tedefroberts
  • 1998 BMW Z3
  • 4 CYL
  • 2WD
  • automatic
  • 125,000 miles

For the past week the first start of the day brings a loud howling noise. The noise ceases after approximately 3 minutes of driving. If I park (to shop etc.) And return within 30 minutes or so, there is no howling on restart. Any ideas? Thanks!

Sunday, December 23rd, 2012 AT 3:52 AM

1 Answer

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

There is an electric air pump that operates when cold. It may be the source of the noise.

Roy

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Sunday, December 23rd, 2012 AT 4:08 AM

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