Disconnect negative (-) battery cable and cover battery terminal to keep cable from accidentally contacting terminal.
Raise vehicle to gain access to bottom of engine.
Make sure the car is stable and well supported at all times. Use a professional automotive lift or jack stands designed for the purpose. A floor jack is not adequate support.
Working underneath car, push back rubber boot covering shift linkage.
• Loosen hex bolt (arrow) and pull shift rod out of shift coupler.
^ Remove rear stabilizer bar.
• Unbolt stabilizer bracket bolts (arrows) at left and right sides and lower bar out of car (left side shown).
^ Disconnect heater hoses from heat exchangers. Right side shown (arrow).
— Remove accelerator cable end from bellcrank on side of transmission.
— Support transmission with transmission jack.
^ Disconnect ground strap (A) between body and transmiss-sion.
• Remove transmission crossmember bolts. Right side shown (B).
— Carefully lower transmission about 15 cm (6 in.).
^ Remove wires from starter terminals 30 and 50.
— Using 10 mm alien wrench, remove starter mounting nuts.
— Slide starter toward front of car to remove.
— Installation is reverse of removal.
• Shift rod linkage to shift rod 25 Nm (18 ft lb)
• Stabilizer bar to body (bolts) 25 Nm (18 ft lb)
• Starter to transmission 45 Nm (33 ft lb)
• Transmission crossmember to body 80 Nm (58 ft lb)
Disconnect the battery negative (-) cable before disconnecting any wires from the rear of the alternator. Battery voltage is wired directly to the alternator without fuse protection. Reconnect the battery cable after all wires have been safely disconnected and insulated.
• Never operate the engine with the battery disconnected.
• Never operate the alternator with its output terminal (B+ or 30) disconnected and the other terminals connected.
• Never short, bridge, or ground any terminals of the charging system except as specifically described in Charging system troubleshooting.
The charging system provides the current necessary to keep the battery charged and to operate the car's electrical accessories. The system includes an alternator driven from the engine crankshaft by a V-belt to generate the charging current, and a voltage regulator to control the charging current.
To prevent damage to the alternator or regulator when making tests or repairs, make all connections with negative (-) to negative, and positive (+) to positive unless directed otherwise. Even momentary contact with a conductor of the wrong polarity can damage the alternator's diodes. Make certain that the battery negative (-) cable is securely fastened, and that the cable to terminal 30 on the starter is connected to the battery's positive (+) terminal.
Rated output of the alternator when measured at the battery with the engine running can be 10 to 15 amps less than specified in the specifications listed below. The difference is accounted for by electrical consumers and is a normal condition.
♦ 1984-1989 911 Carrera 90 amp
^ The voltage regulator (arrow) is mounted to the back of the alternator housing. Voltage regulators and alternator are available as replacement parts from an authorized Porsche dealer. Robert Bosch remanufactured alternators are also available from many auto parts stores.
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