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1991 Porsche 911 Service and Repair Manual
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$29.99 USD
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Covers all 1991 911 trims — Carrera 2 Targa 2-Door, Carrera 2 Convertible 2-Door, Carrera 2 Coupe 2-Door +4 more ·
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Complete repair procedures
Wiring diagrams & schematics
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$29.99
1991 Porsche 911 Service and Repair Manual
Regular price
$29.99 USD
Unit price
This 1991 Porsche 911 factory service and repair manual is built around the exact engine, trim and model-year combination of your car, so the torque values, clearances and diagnostic steps inside are the ones Porsche published for this 911 rather than a generic air-cooled reference.
Engines
- 3.6L H6 (VIN B) Gas
- 3.3L H6 (VIN A) Turbocharged Gas
Trims
- Carrera 2 Targa 2-Door
- Carrera 2 Convertible 2-Door
- Carrera 2 Coupe 2-Door
- Carrera 4 Convertible 2-Door
- Carrera 4 Coupe 2-Door
- Carrera 4 Targa 2-Door
- Turbo Coupe 2-Door
Known issues on the 1991 911. Four recalls are on federal record for this model year. The first covers the cruise control linkage, where the ball sockets can break and let the linkage jam against nearby components, impairing throttle plate operation and the engine's return to idle. The second covers the steering column upper universal joint, which can crack during manufacturing and lead to noise, free play, and eventually loss of steering control. The third covers the hydraulic brake pressure reduction valve, which can slow the rate of pressure reduction and cause rear wheel lock-up even with the anti-lock brake system engaged. The fourth covers the rear heater blower resistor, which can overload when the blower binds or seizes and generate enough heat to ignite the nearby plastic air pipe. Owners have filed 1 complaint for the year and no technical service bulletins are logged. The factory diagnostic and repair procedures behind each of those systems are here.
From a cruise control linkage inspection to a rear heater blower check or a routine service interval, it keeps you on the OEM procedure and the correct specification for your specific 1991 911.
A PART OF THE STEERING COLUMN UPPER UNIVERSAL JOINT CRACKED DURING THE MANUFACTURING PROCESS.
Consequence
THIS CONDITION COULD RESULT IN NOISE AND FREE PLAY IN THE STEERING SYSTEM AND IF LEFT UNCORRECTED, W
Remedy
DEALERS WILL INSPECT THE UNIVERSAL JOINT FOR CRACKS AND WILL REPLACE CRACKED JOINTS WITH NEW PARTS.
THE HYDRAULIC BRAKE PRESSURE REDUCTION VALVE CAUSES THE RATE OF HYDRAULIC PRESSURE REDUCTION TO SLOW DOWN, WHICH MAY RESULT IN THE REAR WHEELS LOCKING-UP EVEN WITH THE ANTI-LOCK BRAKE SYSTEM IN OPERAT
Consequence
REAR WHEEL LOCK-UP MAY RESULT IN LOSS OF VEHICLECONTROL AND AN ACCIDENT.
Remedy
PORSCHE DEALERS WILL INSTALL A MODIFIED HYDRAULIC BRAKE PRESSURE REDUCTION VALVE.
AFTER THE ENGINE HAS BEEN TURNED OFF, THE REAR HEATER WILL AUTOMATICALLY OPERATE IN ORDER TO DISSIPATE HEAT IN THE ENGINE HEATING SYSTEM. DURING THIS OPERATION, THE RESISTOR FOR THE REAR HEATER BLOWER
Consequence
THE OVERLOADED RESISTOR CAN CREATE HEAT SUFFICIENT TOIGNITE THE PLASTIC AIR PIPE TO WHICH IT IS CONN
Remedy
PORSCHE DEALERS WILL INSTALL A NEW RESISTOR CONTAINING A CIRCUIT BREAKER.
THE BALL SOCKETS ON THE CRUISE CONTROL LINKAGE CAN BREAK, ALLOWING THE CRUISE CONTROL LINKAGE TO BECOME DETACHED ON ONE END AND JAM ON NEARBY COMPONENTS, WHICH COULD IMPAIR THROTTLE PLATE OPERATION.
Consequence
IMPAIRED THROTTLE PLATE OPERATION COULD PREVENT THEENGINE FROM RETURNING TO IDLE, RESULTING IN UNWAN
Remedy
REPLACE THE CURRENT PLASTIC BALL SOCKETS WITH A NEW LINKAGE USING STEEL BALL SOCKETS, AND LUBRICATE
Special tools and equipment information for the Boxster, Cayman, 911, and Panamera
Information for PIWIS tester update 42.300.050 & .052
Instructions on manufactures certificate for approved Porsche A40 engine oils
Instructions on manufacturers certificate for approved C20 engine oils
Instructions on manufactures certificate for approved Porsche C30 engine oils
Information for PIWIS tester update 42.300.035
Information for PIWIS tester update 42.300.040 & .041
Information for PIWIS tester update 42.300.030 - .032
Showing the 8 most recent of 82 technical service bulletins on file with NHTSA.
ON 4/18/2021 I WAS DRIVING MY 1991 PORSCHE C2 ON THE 10 FREEWAY IN MONTEREY PARK, CA WHEN SUDDENLY I HEARD A LOUD BANG SOUND FROM THE ENGINE. I GOT OFF THE FREEWAY AND STOPPED AND FOUND THAT THE ENTIR
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