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Old 05-13-2013, 06:27 AM   #1
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Engine making a noise - again

3 months ago it started rattling 3 days after I bought it. Turned out to be the water pump. Now it's making a noise again. Any thoughts to what it could be? Here is the audio:

Boxster 3.2L Engine Noise - YouTube

PO said the idler pulley had been changed. Alternator has been rebuilt (bearings included). Clutch in or out does not make a difference.

Thanks.

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Last edited by patssle; 05-13-2013 at 06:51 AM.
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Old 05-13-2013, 07:29 AM   #2
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Does the sound change pitch when RPM's increase? Have you tried running the motor without the belt to see if the noise goes away?
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Old 05-13-2013, 04:05 PM   #3
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Found the problem. A bolt from said water pump change came loose and was rubbing against the belt. In the 2nd photo you can see the belt grindings. A shop changed the pump - so this is their error.



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Old 05-13-2013, 04:41 PM   #4
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Quote:
Originally Posted by patssle View Post
Found the problem. A bolt from said water pump change came loose.
WTF?
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Old 05-13-2013, 05:16 PM   #5
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Quote:
Originally Posted by TeamOxford View Post
WTF?
Does that sound like BS? (genuine question)

My dad suspects it may have been like that.

1. The bolt won't screw back on - it seems snug (I didn't try to loosen it though).
2. If it was loose, why is the belt rubbing in 1 exact spot - wouldn't the bolt be turning?

So either it was cross threaded, some dirt is preventing it from screwing back on, it's too long of a bolt, or it is loose.

Any thoughts on this? (the belt is loosened in this photo)


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