19781995 Porsche 928 GT, GTS, S4 Workshop Manual

Porsche 928 Official Workshop Manual (1978–1995)

• Covers 1978–1995 Porsche 928, 928 S, 928 S4, 928 GT, and 928 GTS models, documenting technical specifications for V8 engine variants and drivetrain configurations.
• Official workshop documentation, printed in Germany (revised XXVII 1991, PN 928.105.155.07).
• Contains dozens of exploded-view diagrams, torque specification tables for internal engine components, and electrical pinout references for the diagnostic socket.
• Instant download access directly to your device the moment you complete checkout.
• Highly practical for the shop floor—print only the specific sections you need without ruining a physical book.

When dealing with a complex machine like the Porsche 928, guesswork is not an option. This 1991 edition provides the definitive assembly data and maintenance parameters required for both the earlier 16-valve units and the highly tuned 32-valve iterations.

The manual is systematically organized into repair groups that cover the drive unit, drivetrain, chassis, bodywork, and electrical systems. It offers detailed diagnostic guidance for the LH and EZK control units, allowing technicians to accurately interpret error codes for sensors, fuel injection hardware, and ignition systems. You will find a complete structural breakdown for internal engine components—ranging from crankcase assembly and crankshaft bearing clearances to camshaft housing and valve train settings. Critical specifications for intake and exhaust valve timing, piston-to-cylinder bore tolerances, and fluid capacities are clearly laid out across the different model years.

For daily workshop operations, having exact factory figures on hand prevents costly mechanical errors. The text documents the camshaft housing torque at 45 Nm and details the multi-stage tightening sequences for main bearing bolts. It also lists practical fluid requirements, such as the 16-liter coolant capacity and the 7.5-liter engine oil volume. On the electrical side, reference data includes the standard 12 V battery rating and specific resistance values for engine temperature sensors (spanning 32°F to 212°F) to verify system integrity.

Because working with automotive electrical systems, pressurized fluid lines, and heavy drivetrain components carries inherent physical risks, always observe standard shop safety protocols and use appropriate protective gear when applying these specifications.

Available immediately as an instant download, you can pull up these exact factory tolerances on a shop computer or tablet right now, minimizing diagnostic downtime and keeping your project on track.