1975-1989 Porsche 911 Turbo (930) Workshop Manual (P/N WKD 481 321)

• Covers 1975–1989 Porsche 911 Turbo and Turbo Carrera (Type 930) models, including 3.0L and 3.3L engine variants
• Official Porsche OEM publication WKD 481 321, Edition 1976 with subsequent 1980s updates
• Contains 47 detailed exploded-view diagrams and 18 technical torque specification tables for engine and fuel system components
• Factory-authorized reference detailing 930 engine assembly, fuel injection timing, and turbocharger system parameters

Engine and Turbocharger Reference

The Porsche 911 Turbo manual delivers a deep dive into the mechanical layout of the 930 engine family, making it an essential reference for shop technicians. It outlines component configurations for the light-alloy, two-piece crankcase and forged crankshaft. You will find detailed breakdowns of the turbocharger oil supply circuit, waste gate pressure control valve, and the intake air intercooler. Furthermore, the documentation provides the exact data needed for Continuous Injection System (CIS) adjustments and idle settings across various global market configurations.

Specifications and Technical Data

Accurate figures are critical when handling the Type 930 build. This publication lists strict reference values for piston and cylinder clearances, valve spring lengths, and ignition timing. Cylinder head bolt torque values follow a precise multi-stage sequence, starting at 33 Nm for initial assembly. Engine rebuilding requires exact tolerances, so the manual includes multi-size wear tables for crankshaft bearing journal dimensions, alongside intake valve clearances set at 0.10 mm and a total system oil capacity of 13 liters. Because these high-performance systems demand absolute precision, always ensure hands-on mechanical work is performed safely by qualified personnel relying directly on these authoritative OEM specifications.