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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) 911 is equipped with 2 oil filters.
DRIVE BELT ADJUSTMENT

Application (1) Deflection - In. (mm)
A/C Compressor 13/64 (5)
Alternator (2) & Cooling Blower 13/64 (5)
(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 (frontmost) half of the belt pulley. DO NOT  alter the total number of shims (6). This procedure correctly increases belt tension.
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