1994–1998 Porsche 911 Carrera, Carrera 4, RS, S, 4S, Targa & Turbo (993) Factory Repair Manual (P/N 993.602.301.00)

• Porsche 911 Carrera (993) repair documentation in a 1,481-page PDF, with Carrera 4 supplements, RS procedures, and Carrera S/4S specifications.
• Engine procedures cover removal, crankcase and cylinder-head repair, camshaft timing, and Varioram vacuum-system testing.
• G50/G64 manual-transmission overhaul and A50 Tiptronic service address clutch controls, gear assemblies, torque converters, hydraulic controls, and final drives.
• Chassis sections detail wheel-bearing replacement, rear-axle kinematic toe-in adjustment, ABS/ABD service, and brake-booster testing.
• Body repair extends to structural panel replacement, Cabriolet top fabric and rear-window work, and bonded glass installation.
• System Tester 9288 diagnostics provide fault-memory, actual-value, and actuator tests, supported by Model 95/2 wiring diagrams.
• Selected Turbo shared-system references and Targa rear-wiper and harness procedures are included; dedicated Turbo engine/turbocharger and Targa glass-roof repair chapters are not.

Structural Overview of the 993 Documentation

Eight volumes follow repair groups 0–9 plus Diagnosis group D. Volume VIII collects diagnostic test plans separately from mechanical repair procedures. Carrera 4 supplements identify operations that differ from the rear-wheel-drive Carrera.

Page totals include covers and introductory material. Exploded-view assembly diagrams and torque-value charts accompany fluid capacities, wear limits, clearances, pressure-test specifications, and electrical test data.

Engine and Maintenance Specifications

The engine sections distinguish M64/05–08, M64/20 RS, and M64/21–24 Varioram applications. The fan-driven, air-cooled flat-six uses dry-sump lubrication and a thermostatically controlled front-fender oil cooler.

Crankcase work includes main-bearing bore measurement and oversize reaming. Cylinder-head procedures extend to valve-guide replacement and hydraulic lash-adjuster travel checks after valve or seat machining.

Timing instructions separate earlier camshaft drives from the one-piece, four-hole sprocket design. Camshaft locks 9551 (000.721.955.10) and 9552 (000.721.955.20) are identified by tool and order number.

The engine oil circuit diagram and Varioram hose connection schematics support lubrication and intake-system diagnosis. Maintenance covers oil and filter changes, belt checks, spark-plug replacement, and DME dual-ignition testing.

The crankcase assembly notes warn that through-bolts rotating during tightening can damage their O-rings.

G50/G64 Drivetrain and A50 Tiptronic

Transmission-number breaks distinguish early and revised first- and second-gear synchronizers and their compatible parts. Carrera 4 repair coverage adds the Z64/20 front final drive, central shaft, and viscous-clutch testing.

A50/04 and A50/05 Tiptronic material covers ATF-pump inspection, selector and parking-lock mechanisms, and cooler-line flushing after contamination. Final-drive procedures include bearing adjustment and ring-and-pinion setup.

One important assembly warning concerns converter seating: an incorrectly installed converter can damage both the converter and the ATF pump when the engine and transmission are joined.

RS Alignment, Brake Boosters, and Steering

RS sections distinguish M002 and M003 Clubsport configurations, with separate road and racing alignment information. Brake procedures distinguish vacuum and hydraulic boosters and include pressure-accumulator testing and ABD secondary-circuit bleeding.

Steering coverage addresses replacement, leakage checks, and bleeding. Internal steering-rack and power-steering-pump rebuilding is excluded; these assemblies are treated as replacement units.

Cabriolet Body Work and R134a Air Conditioning

Cabriolet body repairs account for the May 1995 change from narrow to wide joints between the rear side sections and rear center panel. Other procedures cover rear-spoiler microswitch adjustment and seat-heater calibration after control-unit or heating-element replacement.

R134a air-conditioning work includes pressure testing and removal of the heater/A/C unit, compressor, and expansion valve. The high-pressure versus ambient-temperature chart supports evaluation of A/C test results.

Diagnostic Test Plans and Wiring Coverage

DME, Tiptronic, ABS/ABD, airbag, heater, and alarm test plans go beyond code lists, with fault-isolation checks, actual values, and actuator tests where applicable. Tiptronic diagnosis distinguishes G03 and G10 versions; G10 material includes country coding from model year 1996.

Named wiring sheets include ABS/ABD and Tiptronic Transmission, alongside connector and ground-point information. Harness repair instructions address model-year and left-/right-hand-drive differences. The included Model 95/2 drawings are not separate complete wiring sets for every 1994–1998 model year.

For engine/transmission lifting, hydraulic brake-booster work, and airbag service, follow the manual’s support, pressure-release, and electrical-isolation precautions.