Repair and Diagnosis: Technical Service Bulletins

• How to Find Technical Service Bulletins by Category/Symptom
• Recalls
  • Generals
    • Campaign - Steering Pump Switch Protection
      • Overview
      • Procedure and Parts
      • Work Procedure
      • Administrative Procedure
      • Owner Letter
  • Safety
    • Recall - Replacement of Fuel Hose/Rail
      • Overview
      • General Information
      • Letter to Owner
      • Repair Procedure
        • 924S, 944 and 944 Turbo
        • 944S
      • Administrative Procedure
    • Recall 90V061000: Defective Fuel Hose
• Customer Interest
  • Cooling System - Corrosion
  • Engine - High Temperature Gauge Readings
  • Radiator - Plugged Up
  • Shock Absorbers (Rear) - Knocking or Rattling Noises
  • Leather Upholstery - Reconditioning
  • Hydraulic Clutch - Pedal Stays Down/Air In the System
  • Battery - Diagnosing a Discharging Condition
    • Overview
    • 1. General Information
    • 2. Battery Service/General
    • 3. Vehicle Delivery Hints (See Delivery Check Sheet)
    • 4.0 Replacement Battery (Filled or DRY)
    • 5. Discharged Battery
      • Overview
      • 5.1 Preservation Charging
      • 5.2 Discharged and Sulfated Batteries
      • 5.3 Reference Values For Battery Discharge/Parking Time
    • 6. Battery Voltage Checking
      • Overview
      • 6.1 Battery Voltage Correction Values
      • 6.2 Checking Electrolyte Density
      • 6.3 Correction Values For Electrolyte Density
    • 7. Starting Capability (Load Test)
    • 8. Checking Constant Current Draw ( All Vehicle Types)
    • 9. Summary
    • Battery Maintenance Log Sheet
    • Battery Check Sheet
  • Engine - Hard Starting and Detonation
  • Brakes - Pedal Pulsation/Vibration
  • Engine - Poor Start, Misfire, Backfire, or Stalling
  • Body - Possible Water Entry Points
  • Power Steering Pressure Hose - Touches Oil Pan
  • Luggage Compartment Cover Hooks - Breakage
  • Engine - Oil Pressure Too High
  • Brakes - Squeaks May Be Normal Performance
• Superceded Bulletins
  • 20/07 - 12/21/07
  • 91/05 - 07/28/05
  • 49004 - 02/15/90
  • 49006 - 06/22/90
  • 48811 - 12/02/88
  • 48705 - 06/05/87
  • 49006 - 08/07/90
  • 49101 - 01/22/91
  • 49104 - 04/09/91
  • 9201 - 06/25/92
  • 9407 - 02/17/94
  • WARR9409 - 09/02/94
  • WARR9508 - 01/26/95
  • 19103 - 03/26/91
  • 19011 - 05/08/90
  • 18803 - 09/04/88
  • 18708 - 06/03/87
  • 18623 - 11/07/86
  • Warranty Program - Pre-Owned Vehicles
  • Alpine CD-2 Radio - Security Code
  • Power Steering Racks - Diagnosing & Repairing Leaks
  • Brake Caliper - Sliding Lubricant Use During Service
  • Cylinder Head Gaskets - Oversized for Machined Heads
  • Tire Manufacturers - Customer Service Phone Numbers
  • Engine - Porsche Approved Engine Oils
  • Engine - Engine Oils Approved By Porsche
  • Engine - Overview Of Approved Engine Oils
  • Engine - Approved Engine Oil Specifications
• All Technical Service Bulletins
  • Drivetrain - Drive Shaft Grease Incorrectly Labeled
  • Vehicle - Use Only Approved Parts For Collision Repairs
  • 18801 - 02/12/88
  • Warranty - Revised Parts Submission Report Print Cycles
  • Tools - Car Protection During Service
  • Warranty - Pre-Owned Program Changed
  • Tools - Quick Scope Plus
  • Tools - Auto Scopemeter & Engine Analyzer
  • Warranty - Special Colored Mailing Envelopes
  • Warranty - Parts Submission Acknowledgements
  • Warranty - Major Unit Replacement Authorization Required
  • Warranty - Engine Follow Up Service After Major Repairs
  • Electrical Harnesses - Routing and Securing
  • VIN, Certification, & Emission Label - Availability
  • Vehicle - Approximate Oil/Fluid Capacities Chart
  • Tools - Minimum Requirement Listing
  • Service Publicatons - Additional Bulletins & Microfiche
  • Warranty - Access Start Dates and Recall Inquiry
  • Technical Information Books - Available Stock Listing
  • Technical Bulletin Index
  • Techincal Information Booklets - Current Availability
  • Literature Bulletins - Valid Listing
  • Warranty - Claim Review Procedures
  • Microfiche - New Issues and Table of Contents
  • Parts Marking - Law/Policy
  • Tools - Needed to Perform Certain Vehicle Repairs
  • Tools - Needed to Correctly Perform Certain Repairs
  • Warranty - Microfiche Tips, Types of Labor Time
    • Overview
    • Claiming Actual Time (A-Time)
    • Diagnosis Time
    • Overlapping Labor
    • Operation Description Labor Overlap, Examples
  • Vehicle - Mileage Maintenance Requirements
    • Overview
    • Model 911, 911 Turbo
    • Model 928 S4
    • Model 944, 944S, 944 Turbo, 924S
    • 1000 Mile Maintenance Service
    • 7,500, 22,500, 37,500 Miles, Etc. Maintenance Service Turbo Engines Only
    • 15,000, 45,000, 75,000 Mile Maintenance Service
    • 30,000 60,000 90,000 Mile Maintenance Service
  • Warranty - Close-Out of 1987 Transactions
  • Warranty Policy and Procedures Manual - Revision
  • Workshop Manuals - Ordering Information
  • Warranty - Improper Modifications to Electrical System
  • Warranty - Customer Signature Requirement on RO
  • Oil Level Warning System - Owners Manual Correction
  • Oil Level Warning System - Stages of Component Install
  • Tools - Testers for Alarms, Central Warning, & Air Bag
  • A/C - Leakage Survey
    • Overview
    • 924S
    • 944, 944S, 944 Turbo
    • 911 Carrera
    • 928 S4
  • A/C - Revised Sealing Rings for Expansion Valves
  • A/C Refrigerant - General Recovery & Recycling Tips
  • A/C - Substitutes for R-12 Refrigerant
  • A/C Refrigerant - Identifier
  • A/C - Refrigerant 134a Use
  • Power Steering Reservoir/Hose - New Clamps
  • Power Steering - New Procedures Working on Pumps/Racks
  • Camshaft Drive Belts - Recommended Usage
  • Connecting Rod Nuts - Incorrectly Made
  • Toothed Drive Belts - Diagnosing Condition
    • Overview
    • Belt Adjustment Procedures Information
    • General Toothed Drive Belt Hints, Belt Condition Diagnosis Information
  • Oil Cooler - Improved Mounting
  • Mechanical Tensioner - Material Changed
  • Oil Intake Pipe Seal - Revised
  • Oil Pressure Relief Valve - Identification & Application
  • Poly Rib Belt - Tensioning Procedure
  • Tools - Oil Cooler Testing
  • Oil Pan - Sealing
  • Engine Short Block - Installation Modifications
  • Cylinder Heads - Tightening Procedure & Service Changes
    • Overview
    • 924 Model
    • 924 Turbo Model
    • 924S, 944, 944S, 944 Turbo Model
    • 911 Carrera Model
    • 928, 928S, 928 S4 Model
  • Timing Belt Cover - Ventilation System Change
  • Toothed Engine Belts - Storage, Packing and Handling
  • Valve Seal - Replacement Procedure
    • Overview
    • Work Procedure:
    • Installing New Seals
  • VIN Plate, Certification & Emission Label - Availability
  • VIN, Certification & Emission Labels - Availability
  • Cooling System - Corrosion
  • Cooling System - Clean & Flush After Repairing Leak
  • Coolant Pump - Installing New Type
  • Engine - High Temperature Gauge Readings
  • Radiator - Plugged Up
  • Radiator Thermoswitch - Mounting Modified
  • Cooling System - Approved Phosphate Free Anti-Freeze
  • Electrical System - Poor Pin/Ground Lug Connections
  • Campaign - Steering Pump Switch Protection
    • Overview
    • Procedure and Parts
    • Work Procedure
    • Administrative Procedure
    • Owner Letter
  • Power Steering Pump - Flush Hoses After Replacing
  • Brake Pad - Installation Hardware Ordered Separately
  • Brake Pad Retaining Pin Lock - Changed
  • Brake Pads - Available Without Asbestos
    • Overview
    • 4 Cylinder Cars (Water-Cooled)
    • Air Cooled Cars (911, 911 Turbo, 912 and 914)
    • 8 Cylinder Cars
  • Spark Plugs - Install With Threads Clean and Dry
  • Spark Plugs - Revised Plugs and Tightening Torque
  • A/C Compressor - Survey
  • Power Steering Gear - Diagnosis
  • Camshaft Drive Belt - Adjustment
  • Camshaft Belt - Adjustment
  • Cylinder Heads - Machining and Using Correct Gaskets
  • Oil Cooler/Oil Pressure Relief Valve - Repair Guide
    • Overview
    • Section 1 - Oil Pressure Relief Valve
    • Section 2 - Oil Cooler Repairs
  • Oil Pump - Modification
  • Cooling Fan Motor - Correct Positioning
  • Shock Absorbers (Rear) - Knocking or Rattling Noises
  • Shock Absorbers - Usage Identification Chart
  • Wheels - Unapproved Installation of 18 Inch Wheels
  • Tires/Wheels - Summer Recommendations
    • Overview
    • Tire Pressures 924S/944/Turbo/S/S2
    • Wheel Rim For Summer Tires, 944TURBO/S/S2
    • Tire Pressure, Tire and Wheels Model 968
    • Tire Pressure, Tire and Wheels, 911
    • Summer Tire Dimensions and Makes, 911
    • Tire Pressure, Tire and Wheels 928/S/S4/GT
  • Tools - Special Wheel Balancing Adapter
  • Wheels - Non Approval of Chrome Plating Aluminum Wheels
  • Wheels - Retrofitting Unapproved 18 Inch Wheels
  • Tire/Wheel Rim - Latest Winter Recommendations
    • Overview
    • Tire Pressures
    • Collapsible Spare Tire Information
    • Recommended Winter Tires For Porsche 4 CYL. ENG. Cars
    • Winter Wheel Rim and Tire Sizes For Porsche 4 CYL. ENG. Cars
    • Survey of 4 CYL. Porsche Wheel Rims For Winter Tires
    • Recommended Winter Tires For Porsche 6 CYL. ENG. Cars
    • Winter Tire/Wheel Rim Summary and Tire Sizes For 6 CYL. ENG. Cars
    • Survey of 6 CYL. ENG. Porsche Wheel Rims For Winter Tires
    • Recommended Winter Tires For Porsche 8 Cylinder Engine Cars
    • Winter Wheel Rim and Tire Sizes For Porsche 8 Cylinder Engine Cars
    • Survey of Porsche Wheel Rims For Winter Tires - 928/S/S4/GT
  • Wheel Balancing - Service Recommendations
  • Wheel/Tire - General Information
    • Overview
    • Mounting, Balancing & New Wheel/Tire Information
    • Tire Pressure & Tire Storage Information
  • Tires/Wheels - Winter Tire/Wheel Rim Summary
    • Overview
    • Recommended Winter Tires and Matching Wheel Rims
  • Tires - Bridgestone RE 71 Tires Approved
  • Tires - Manufacturer Contact Information
  • Gas Cap Lock - Modifying
  • Leather Upholstery - Reconditioning
  • Seat Back Frames - Repairing
  • Lifting Roof Gear - Replacement
  • Lifting Roof - Modification
  • Hydraulic Clutch - Pedal Stays Down/Air In the System
  • Battery - Check Sheet
  • Battery Check Sheets - Documentation
  • Battery - Diagnosing a Discharging Condition
    • Overview
    • 1. General Information
    • 2. Battery Service/General
    • 3. Vehicle Delivery Hints (See Delivery Check Sheet)
    • 4.0 Replacement Battery (Filled or DRY)
    • 5. Discharged Battery
      • Overview
      • 5.1 Preservation Charging
      • 5.2 Discharged and Sulfated Batteries
      • 5.3 Reference Values For Battery Discharge/Parking Time
    • 6. Battery Voltage Checking
      • Overview
      • 6.1 Battery Voltage Correction Values
      • 6.2 Checking Electrolyte Density
      • 6.3 Correction Values For Electrolyte Density
    • 7. Starting Capability (Load Test)
    • 8. Checking Constant Current Draw ( All Vehicle Types)
    • 9. Summary
    • Battery Maintenance Log Sheet
    • Battery Check Sheet
  • Engine - Hard Starting and Detonation
  • Recall - Replacement of Fuel Hose/Rail
    • Overview
    • General Information
    • Letter to Owner
    • Repair Procedure
      • 924S, 944 and 944 Turbo
      • 944S
    • Administrative Procedure
  • Fuel Filler Neck - Improved Sealing
  • Fuel Distribution Pipe Spacer - Reinstall During Service
  • Exhaust System - Sulfur Like Smell
  • Blaupunkt AM/FM Cassette Radio - Survey
  • Radio Serial Number Labels - Availability
  • Brakes - Pedal Pulsation/Vibration
  • Engine Main Bearing - Revised Torque
  • Engine - Poor Start, Misfire, Backfire, or Stalling
  • Engine Performance - Tune Up Specifications
  • Fuel/Ignition Modules - Use of Aftermarket Microchips
  • Wiper Motor Hole (In the Rear Hatch Glass) - Changed
  • Body - Possible Water Entry Points
  • Paint - Manual Supplements
  • Tools - Celette Collision Repair Systems
  • Vehicle Security Codes - Requesting
  • Rear Lid Latch Assembly - Water Entry
  • CO Sample Pipe - Material and Mounting Change
  • Control Unit - Parts, Coding/Adapter Plug, O2 Sensor
  • Outside Door Handle Pivot Lever - Available Parts
  • Hood - Insulation Material Discontinued
  • Windshield Cement - Mixing
  • Engine Lubrication - Oils That Minimize Carbon Build-Up
  • Engine - Motor Oils That Minimize Carbon Build-Up
  • Engine - Approved Engine Oils
  • Engine - Porsche Approved Oils
  • Power Steering Pressure Hose - Touches Oil Pan
  • A/T - Engine Vacuum Testing
  • A/T - How To Use A Pressure Gauge
  • A/T - Slipping or No-Shift/Metal Sealing Rings
  • A/T - Front Bushing Wear
  • A/T - Math Formulas Part I
    • Overview
    • Shift Speed and Pressure
    • Speedometer Ratios
  • A/T - Twenty Steps To Successful Repairs
  • A/T - Math Part II
  • A/T - Choosing the Right ATF
  • M/T - Synchronizing Ring Diagnosing Failures
  • Clutch Housing - Dust Cap Must Be Installed
  • Tools - Boost Measuring Gauge Hose Available
  • Engine Mount - Revised, Installation and Checking
  • Vehicle - Year 2000 Hardware/Software Readiness
  • Recall 90V061000: Defective Fuel Hose
  • Tools - Wheel Alignment Equipment
  • CV Joint - New Grease
  • Luggage Compartment Cover Hooks - Breakage
  • Radios/CD Players - Obtaining & Entering Security Codes
    • Overview
    • Alpine CD-2
    • Reno II Radio
    • Stuttgart Radio
  • Engine - Oil Pressure Too High
  • A/C - Use of Correct Refrigerant
  • Brakes - Squeaks May Be Normal Performance
  • A/C - Refrigerent Oil Volume Capacities
  • Engine - Approved Engine Oils Overview
  • Tires - Summer Tire Summary
  • Engine - Approved Porsche A40 Engine Oils
  • Tires/Wheels - Handling Instructions After Damaged
  • Engine - Approved Engine Oil Specification