Porsche Carrera 964, 1989-1994 Without Guesswork: Technical Data; Porsche Carrera 2, Carrera 4, RS America, Turbo 3. 3, Turbo 3. 6

Where appropriate, the handbook delivers very helpful 911 - specific repair instructions and notes. Even if you're an old hand at replacing drive belts on other cars, when replacing the alternator and cooling fan belts on a 911 you have to "adjust V-belt tension by moving adjustment shims to inside or outside of pulley halves." When replacing the clutch, you'll need to know that the "cross-shaft needle bearings are not identical [so check] proper location before installing." Not sure where t…