1994 Porsche 911 Speedster, AutomaticFACTORY OEM SERVICE PROCEDURE

Service Intervals & Specifications

REPLACEMENT INTERVALS

Component Miles
Air Filter (1) 30,000
Air Pump Filter 30,000
Automatic Transmission Fluid & Filter 30,000
Camshaft Drive Belt (2) 60,000
Fuel Filter 60,000
Manual Transmission Fluids 60,000
Oil 15,000
Oil Filter (3) 30,000
Spark Plugs 30,000
"V" Belt & Polyrib Belt 30,000
(1) Check air filter every 15,000 miles and replace if necessary.
(2) Check camshaft and balance shaft belt tension after 2000-2500 miles.
(3) Equipped with 2 oil filters.
DRIVE BELT ADJUSTMENT

Application (1) Deflection - In. (mm)
A/C Compressor 13/64
Alternator (2) & Cooling Blower 13/64
(1) With light pressure applied to center of belt. Power steering pump belt tension is not adjustable.
(2) If alternator belt is too loose, take one shim from between belt pulley and mount it in the front of the foremost (front most) half of the belt pulley. DO NOT  alter the total number of shims (6). This procedure correctly increases belt tension.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.