996 Previous model naturally aspirated Porsche 911 community. Discuss C2, C2s, C4, C4s, Targa and Cabriolets.

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Old 09-10-2024 | 08:21 AM
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recoyote
engine

Hi all, My 99 car suffers from "bore scoring" with loud tapping noise. When started the oil pressure decreases as the engine warms up. Also decreases when throttle is pressed. Does anyone have any knowledge of this, what is causing it? thanks, coyote
 
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