Reservoir TSB PDF

A technical documentation that addresses a loud whistling noise from the engine area in the Porsche 911 Turbo (996) with an increased performance kit. The noise is associated with the pressure control valve in the steering oil reservoir and can be heard both inside and outside the vehicle. To resolve this issue, replacing the complete steering oil reservoir with a modified valve is advised. This bulletin details the specific part numbers and provides guidance for addressing potential damage caused by metal filings.