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  1. Join Date
    May 2005
    Posts
    6,090
    #2
    What you are hearing is probably one of the belts slipping.

    Most likely the pulleys are affected. Aircon, tensioner, engine pulley.

    Try this for troubleshooting. With a cold engine, start the engine, spray some water onto one of the belts and see if the noise dissipates temporarily.
    Last edited by number001; August 26th, 2013 at 10:24 AM.

Woo-woo noise on cold start