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    Very strange noise

    Hey guys can you help me figure out this noise coming from my m20. Check out this video:





    Recent work:
    Water pump, thermostat, fan clutch, fan, rotor and engine oil (level is correct).
    Any input would be greatly appreciated.

    C
    1989 M3
    1991 M5
    1997 M3 (Technoviolet)

    #2
    It sounds like your fan is hitting something after the rev.

    Comment


      #3
      Originally posted by dnguyen1963 View Post
      It sounds like your fan is hitting something after the rev.
      Thanks, yeah I'll check that out tomorrow in the day light. I texted this video to my friend who is a mechanic. He mentioned it could also be a loose belt. I'll check those two items out tomorrow.
      1989 M3
      1991 M5
      1997 M3 (Technoviolet)

      Comment


        #4
        Originally posted by dnguyen1963 View Post
        It sounds like your fan is hitting something after the rev.
        Wouldn't that depend on if that video is when the car is warm? If it's cold, would the fan even spin?
        1988 Atlantisblau Euro/Japanese 325i Cabriolet
        1989 Schwartz 325i - now M50 powered! - now very dead
        1998 Toyota 4Runner Limited
        My 17,000km Big NA National Parks trip!

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          #5
          Have you watched his video? The fan was spinning.

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            #6
            its probably your lower radiator hose being hit by the fan, just an assumption

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              #7
              Well, first of all, you need to do a valve adjustment. I can hear that for sure....

              The sound you're worried about sounds like the fan blades scraping the radiator at some point....
              My 325iX DIY Threads:

              Front Wheel Bearing Replacement

              325iX Rear Subframe Bushings and MUCH more w/pics!

              325iX Steering Rack Replacement, Suspension, & Oil Pan job w/pics!


              Comment


                #8
                Sounds like something down in the timing belt cover.
                sigpic
                Reich und Roll!

                Comment


                  #9
                  Pull your valve cover you could have a loose rocker arm bouncing around under the cover

                  Comment


                    #10
                    Is that a NEW fan clutch?
                    My 325iX DIY Threads:

                    Front Wheel Bearing Replacement

                    325iX Rear Subframe Bushings and MUCH more w/pics!

                    325iX Steering Rack Replacement, Suspension, & Oil Pan job w/pics!


                    Comment

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