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986 Boxster rattling noise w/out serpentine belt

Joe Forti
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Joe Forti Member

Joe Forti

Posted
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My 2000 Boxster S has developed a rattling/clanking noise that I cannot seem to figure out. It is coming from the front of the engine area, but I have checked all the pulleys, compressor, pump, and alternator and all seem fine! When you run the engine with out the drive belt, the noise still persists as usual. Is the thermostat going bad?

Link to the youtube short of the noise.

Any input would be appreciated!

 

Joe Forti Member

Joe Forti

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18 minutes ago, Loren said:

The pulleys go bad  - especially on a 24 year old car. Check them for trueness and runout.

I don't have the serpentine belt on in the video. Would the pulleys still rattle like that without the belt?

I can take them off tomorrow, they all feel fine but I can have them checked.

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JFP in PA Member

JFP in PA

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It is exceedingly hard to nearly impossible to diagnose anything from video soundtracks.  And no, the pulleys should remain silent when the belt is removed.

 

The sound could be related to the timing chains, but the car needs to be evaluated by a competent Porsche tech or independent before you move forward.

  • 3 weeks later...

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