Engine covered in this Porsche repair manual:

• 3.2 liter 6-cylinder (930/21 and 930/25), horizontally opposed, air cooled.

This manual includes a complete engine disassembly and rebuilding guide, with full details on techniques and specifications, as well as camshaft and timing chain replacement techniques with engine in car.

Transmissions covered:

• 915 (5-speed, with cable-operated clutch)
• G50 (5-speed, with hydraulic clutch)

Complete removal and disassembly guide, including clutch disassembly, clutch cable and linkage rebuilding, clutch hydraulics service.

Technical highlights:

• Maintenance procedures from changing the oil in the 11-quart dry-sump lubrication system to adjusting front wheel bearing play. This manual tells you what to do and how and when to do it.
• Illustrated engine disassembly and rebuilding, including camshaft, timing chain, and timing chain tensioner replacement with the engine in or out of the car.
• Dry-sump lubrication system repair and diagnosis, including replacing leaky oil return tubes with the engine installed.
• Carrera-specific driveability problems, including explanation of the Bosch DME engine management system.
• Complete overhaul of the 915 transmission, including replacing the synchronizer dog teeth.
• Complete clutch service, including clutch cable replacement (1984-86 models) and clutch hydraulics service (1987-1989 models).
• Brake, steering and suspension system maintenance, troubleshooting, and repair, including torsion bar setup and adjustment.
• Heating and air conditioning repair, including A/C component replacement.
• Body adjustments and repairs, including power seat disassembly and repair.
• Electrical system diagnosis and fault finding, with an easy-to-use illustrated component locator section.
• Wiring schematics for all circuits, including power distribution, grounds, convertible top, rear wiper and other hard to find circuits