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Strange One (noise)
About a month ago I posted info. about a noise coming from the right rear of my 1990 C4. Sounded like a combination of a belt squeak/vacuum leak. It only occurs,
after the engine warms up and the thermostat opens. So I figured it must be oil tank/oil circulation related. We pulled the oil tank and checked what we could see. No kinked hoses(replaced a bad rubber mount bushing). The noise is still there. So now I ordered a new tank pressure relief valve(top of tank). Thought that this could be faulty and causing the noise. Any other suggestions, or things to check would be appreciated. T |
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10-07-2007, 04:07 AM
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Join Date: Sep 2006
Location: Toronto, Canada
Posts: 34
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I think I have the same issue with my 993. I have narrowed it down to the cooling fan hub bearing and/or the alternator bearing.
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'10 997.2 C2 Meteor Gray '00 Boxster Arctic Silver - sold 95 C2 Polar Silver - Sold |
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10-07-2007, 04:18 AM
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Join Date: Apr 2006
Location: UK
Posts: 4,974
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Funnily enough I suspect the same noise on my 964,
can I check the alternator bearing easilly, how much movement should I find by gripping it with its belts in place
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Nineteen Ninety One 964 |
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10-07-2007, 05:36 AM
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1990 Porsche 964 Carrera 4 3.6 liter
