Porsche 914, 914/6, 914 Sportomatic, 914-1.7, 914-1.8 and 914-2.0 1970–1975 Workshop Manual (P/N WKD 480 921)

This 1,503-page PDF combines 1,367 pages of Porsche 914/914/6 factory workshop material with a 136-page appended exploded-view parts section. The factory manual is the English 1974 USA/CAN issue with updates through 1975 and is identified in Porsche's literature catalog as P/N WKD 480 921. Porsche assumes familiarity with basic automotive repair procedures and calls for dedicated test equipment and special tools, so this set is best suited to experienced mechanics, restoration shops, and advanced DIY owners.

• Model and engine coverage: Covers the 1970-1975 Porsche 914 series, including Type 914 and 914/6, the 1.7-, 1.8-, and 2.0-liter flat-four engines, and separate factory procedures for the 914/6 flat-six.
• Engine repair: Documents engine and powertrain removal, cylinder-head and valve work, cylinders and pistons, crankcase and crankshaft service, ignition testing, oil-circuit checks, cooling, exhaust, and clutch inspection. The 914/6 material adds dry-sump lubrication, chain-case service, chain tensioners, camshaft-drive setup, and timing adjustment.
• Fuel injection and emissions: Distinguishes MPC injection for the 1.7- and 2.0-liter engines from the 1.8-liter AFC system. Factory checks cover injection testers, fuel delivery, intake-air and temperature sensors, throttle switches, cold-start and auxiliary-air components, idle and CO adjustment, deceleration control, air injection, EGR, and catalytic-converter testing.
• Transmission and final drive: Details the five-speed manual gearbox, side-shift gear assembly, shift-fork adjustment, input and pinion shafts, synchromesh, standard and limited-slip differentials, and ring-and-pinion setup. Sportomatic coverage includes type-specific control valves and reservoirs plus converter housing, servo motor, clutch, function checks, and troubleshooting.
• Chassis and brakes: Includes front and rear alignment, struts, torsion bars, stabilizers, rear control arms and CV joints, steering-gear overhaul, and the modified ZF rack-and-pinion unit introduced at chassis No. 914.043.2140. Brake coverage extends to the dual-circuit master cylinder, calipers, disc runout, pressure-regulator testing, system bleeding, and wheel balancing.
• Body and controls: Covers shift and pedal controls, parking-brake and clutch cables, doors, window regulators, removable-roof and ventilation hardware, 1973-1975 bumper changes, windshield installation, body and underbody alignment dimensions, and major structural-panel repair.
• Electrical and visual references: Provides Type 914 wiring diagrams for 1971-1973, the 1974 and 1975 USA current-flow diagrams, 1975 California addenda, MPC/AFC injection schematics, Sportomatic power-flow drawings, 2.0-liter cooling-system and cylinder-head exploded views, and body/underbody alignment drawings.

Factory Organization and Model-Year Detail

The workshop material is arranged as eight volumes and ten Main Groups covering maintenance and specifications, both engine families, fuel systems, transmission, front and rear axles, brakes and wheels, manual controls, body, and electrical equipment. The four-cylinder engine table identifies W, EA, and EB 1.7-liter builds; EC 1.8-liter builds; and GA and GC 2.0-liter builds.

Model-change pages address crankcase ventilation from 1972, side-shift controls and rear stabilizers from 1973, 1.8-liter AFC and bumper revisions from 1974, and 1975 exhaust, ignition, emissions, steering-lock, wheel, and wiring changes.

Test Equipment, Specifications, and Repair Notes

Fuel-injection diagnosis is built around the EFAW-193, EFAW-238, and VW-1218 testers. Transmission setup calls out the VW 385 universal measuring gauge; 914/6 cam-drive work identifies P 214/P 214b; and clutch-lining repair specifies VW 783. Supporting data includes maintenance and lubrication schedules, filling-capacity charts, component-specific torque tables, ignition and electrical test data, pressure-test specifications, alignment values, tolerances, and wear limits.

The electrical pages repeatedly warn that disconnecting the battery while the engine is running can immediately destroy the alternator. During 914/6 cam-timing work, turning the crankshaft or camshafts out of basic alignment can allow the valves to contact the piston crowns.

The Type 914 clutch section limits workshop service on the diaphragm-spring clutch to inspection; it does not provide clutch reconditioning procedures, although clutch-disc lining repair is covered separately.

Appended Parts-Diagram Scope

The final 136 pages are credited in the file to DerWhite Productions and add Group 1-9 exploded parts views for engine, fuel, manual and Sportomatic gearboxes, axles, brakes, controls, chassis/body, and electrical assemblies. They support parts identification but are not an extension of the Porsche repair procedures. Brake-system service and powertrain removal require proper vehicle support and observance of the manual's service cautions.