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Registered
Join Date: Sep 2014
Location: Mill Valley, CA
Posts: 26
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1989 Targa: Bad "water pump" (haha!) sound?
Dear Porsche fans:
I did a great tour in my 1989 911 Targa this weekend. I did notice, though, on top of an otherwise healthy rumble, a higher-pitched metallic (low-level) "grinding" type of sound. If this were a water-cooled car, I would compare the sound to that of a water-pump about to fail. A bad bearing somewhere, I suspect, on the cooling fan or the air conditioning pump I would wager! Does that concur with what most of you might think, or in your collective experience is there a more typical culprit? Thanks and Happy Motoring! Andy 
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07-05-2016, 07:00 AM
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Registered
Join Date: Oct 2008
Location: Denver, CO
Posts: 3,496
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likely the alternator bearing? Should be easy to rule out the AC by disconnecting the ac compressor belt.
Is the noise constant? If so, once you rule out the AC compressor, you could disconnect the fan belt (the alternator is inside of hte fan), start the car to confirm that the noise goes away and then reconnect the fan belt. If a bad alternator bearing, replace/repair ASAP -- THe fan is crucial to engine cooling and if/when the alternator siezes, it will lock up the fan too. |
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07-05-2016, 07:29 AM
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Registered
Join Date: Sep 2014
Location: Mill Valley, CA
Posts: 26
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As an update, it was a bad AC Compressor...coupled with a non-functioning front condenser fan. All fixed now and back on the road in a much quieter fashion!
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07-13-2016, 06:17 AM
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Member 911 Anonymous
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Congrats!
__________________
'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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07-13-2016, 08:50 AM
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Marble Grey
