911 Turbo Cabriolet (996) F6-3.6L Turbo (2004)
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Overboost Valve: Procedures
Checking And Adjusting The Bypass Flap Control Boxes On The Turbocharger
Check and adjust (cylinder bank 1 - 3)
Test
1. Raise the vehicle at the prescribed jacking points.
2. Fasten special tool dial gauge holder VW 387 onto the underneath of the camshaft housing (cylinder bank 1-3). Flanges with thread M 8 have been
provided or this procedure.
3. Align tracer pin with push rod, set the dial gauge with pre-tension to 0.
4. Connect special tool pressure gauge 9103/2. Connect hand pump and pressure gauge together with branch pieces. Hang pressure gauge on
stabilizer.
5. Remove vacuum hoses from the control box:
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Push a small screwdriver between connection nipple and vacuum hose.
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Widen vacuum hose a little and spray in e.g. silicone spray at the same time.
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Pull off vacuum hose.
6. Connect connecting piece (shop-made) and Tecalan line (shop-made) onto the control box and connect with the pressure gauge.
7. Produce overpressure of 0.5 bar with special tool tester 9160/1. Read off pressure on special tool pressure gauge 9103/2. Have a second person
read off the stroke of the push rod on the dial gauge at the same time.
Prescribed stroke: 4 ± 0.5 mm.
Adjusting
