Welcome to the Document Center
The documents in our library are a combination of factory TSB bulletins and updates that we have compiled over the last thirty years. These are designed to supplement the factory shop manual. Many of these documents are updates to new parts and procedures that are required when working on a 30 to 50 year old vehicle.
To use the document library just click on the desired heading and the document will open in another window. They are open to public for use.
Search function will search the entire site. To Search Bosch numbers use “xxxx.xxx.xxx “ format. you can use seach terms as well like “Cylinder Head” and it will return all options for that term.
Technical Documents For 911/930 Models 1964-89
All technical service bulletins are designed to used to supplement the factory workshop manual. They will contain additional parts and work procedures used to repair certain issues. We have also added our own technical service documents to this list complied from over thirty years of experience of working on these cars. In todays world where many of the original parts are no longer available and the replacement parts are often not within the original specifications, it can make repairing these classic cars much harder. The technical bulletins are listed under their specific area of the vehicle that they pertain to. You can also use the search box at the top to search for certain terms. please be aware that it will only search the titles for your term and it is a site wide search.
Engine Documents
- Ambient Air Valve 1984-89 911
- Air Guide Modification 1964-77 911 and 930 models
- A/C Related Idle Problems
- Low Boost Pressure Reading
- Removing Broken Head Studs
- Bearing Bush With Oil Relief Groove Information
- Camshaft Timing
- New Chain Adjuster
- Chain Sprocket Support
- Hydraulic Chain Tensioner Kit
- Chain Tensioner Mounting
- “Tool” P10c Valve Length
- Clogged Oil Splash Tubes
- Cooler in Right Front Fender Information
- Crankcase and other Parts
- Sealing Crankcase on Oil Pipe
- Crankshaft Pulley Timing Mark
- Cylinder Head Torque
- Cylinder Head Stud Exhaust Sides
- Crankcase Cylinder Studs
- Distributor Drive Gear on Crankshaft
- Engine Performance
- Engine Transmission Mounts
- Gasket Kit to Repair Mounts
- Starter Motor/Gear Damage
- DME System Modification For Idle Stalling and Surging Resolution
- Modified CO Pickup Information
- New Ambient Air Valve to Eliminate Rattling Noises
- Oil Cooler in Right Front Fender
- Oil Drain Plug Torque
- Oil Leaks From Engine Bolt Mount
- Oil Pressure Relief and Safety Valves
- Part – Load Surging
- Replacement Pistons
- Tightening Procedure for Connecting Rods
- Oil Pump
- Reusing Flywheel Bolts
- Disposing of Sodium Filled Valves
- Starter Gear on Clutch Pressure Plate
- Oil Supply Lines for Chain Tensioner Information
- Mounting Bolts For Compressor Support
- 930 part Load Surging
- Checking The Intake System For Leaks
- Torquing of the Crankshaft Pulley
- Unstable Idle Speed 1980-81 911SC
- Valve Clearance Label Information
- Correcting Engine Misfiring
Electrical and Ignition
- No Start, Back fires, 3 and 6 Pin CDI Tachometers
- Secondary Resistance all models using a CDI Box
- CDI System Known Issues
- CDI Coil Failures
- 1975-94 Ignition Distributor trigger wiring issues
- Radio Interfering due to External Factors
- Battery on 911
- Repairing Additional Heaters
- Windshield Antenna for 1985 Models
- Seat Belt Heater Information
- Cruise Control Troubleshooting Instructions
- Wiring Diagram Update for Central Locking System
- Discharged Battery
- Fuses for Additional Fans for Heat
- System for Heating the Seats
- An Inoperative Speedometer
- Outside Temperature Diagnosis & Sensor Information
- Reduced Wattage Of Low Beam Headlights
- Seat Heating/Window Left Relay
- Service Installation of Center Brake Light Information
- Speedometer Modification
- Service Information Video Tape for Cabriolet Top Update
- Whistle Noise Comes From Radio
- Rear Window Wiper Installation
- Wiring Diagram Update for 911 Carrera 1988-1989 Models
- Wiring Diagram Update Central Locking System for Drive Motor
- Electrical Cabrio Top Wiring Harness Information
- New Alternator Has Integrated Regulator
- Spark Plug Connector
- Spark Plugs
- Poor Starter Engagement
- Troubleshooting Temperature Sensor NTC II
- New Voltage Regulator
- DME Wiring Diagram Update
- Changes made to Distributor 911/Turbo 1978 Models
- Modified Distributor and Drive Gears
- Ignition Timing & Dwell Specs
- Marking on Distributor is not Rotor Position
- Spark Plug 1983 Models Chart
Transaxle Documents
- Transmission Gear Rattle 1987-89 911
- 5th and Reverse Gears Modification for Easing Shifting
- Chatter from Clutch
- Clutch Cable Binding
- Clutch Pedal Chatter
- Gear Shift Lever Adjustments
- Hard Shifting 1st and 2nd gear, Reverse Fork
- Transmission Jumps Out Of 1st or 2nd Gear
- Transmission Jumps Out of 1st or 2nd Gear II
- Fifth Gear – Linkage Adjustments
- Modified Clutch Release Lever Bearings
- Scraping Noise When Operating Clutch Information
- Transmission Noise While Coasting in Car
- Reverse Idler Shaft Update
- Adjusting Ring Gear
- Mainshaft Seal and Guide Tube
- Shortened Shift Lever Travel
- Shift Rod Rattles
- Shift Rod Chatter at Idle, Coast or 2500-3000 RPM
- New Seal for Shift Rods
- Torque Specifications for Manual Transmission 950, Model 87
- Transmission Noise From Car
- Nut in Transmission Mainshaft
Chassis Documents
- Updating Parallel arm window regulators
- Brake Fluid Level with Reservoir
- Stop Plate for Brake Pads
- Parking Cable & Expander
- Updated 911 Cabriolet Top Test Plan
- Noise From Front Wheel Seal
- Goodrich Comp. TA Tires Carrera Information
- Discarding Gas Filled Struts
- Installation of Cross Arm Window regulator
- Shock Absorbers for 911 Carrera, 928S and 944
- Shock Absorbers M.Y 1986 Models Information
- Spacer Between Spring Plate and Rear Axle
- Summer and Rim Summary for Tires
- Goodyear Summer Tires Information
- Lowering Vehicle Height Warning
- Improved Window Regulator Stopping
- Winter Tire – Wheel Rim Summary
- Headlight Adjustment 1987 Models
- Correcting Window Sticks
- Outer Door Handle Has Reduced Effort Required
- Seat Backrest Control
- Updated 911 Cabriolet Top Test Plan
Fuel and Exhaust System Documents
- 1973-74 WUR Update
- 1980-81 Unstable Idle 911SC
- CO Adjusting Procedure Instructions
- How to Clean Fuel Injectors Information
- Fuel Injectors for L-Jetronic Vehicles
- Lockable Fuel Cap
- High Idle After Car Warm-Up
- Idle Adjustment and Performance
- Bleed CIS System if Fuel Lines Are Opened
- Oxygen System Check
- New Pressure Control Regulator
- Fuel Return Clamp on Additional Air Pump
Interior/Exterior Documents
- Air Draft and Wind Noise in Door Area
- Antenna Replacement Rod
- Convertible Top Instructions for Carrera
- Inside Door Latch Mechanism Information
- Installing Heater Washer Jets for Your Windshield
- Modifications on Doors and Hinge Pillars
- Folding Top Snaps
- Hardtop Modifications
- Motor Vehicle Thief Act
- Opening and Closing Folding Top
- Clouding on outside Mirror
- Identifying Paint for Purchase
- Removing and Installing Windscreen Without a Frame
- Replacing Cabriolet Rear Bow
- Scratches in Middle of Back Window
- Side Mirror Glass Was Improved
- Repair Solid Spraying Paint for Porsche
- Eliminate Sunroof Rattles
- Cabriolet roof Testing/Adjustment Operations
- Optional Tonneau Cover Installation
- Cabriolet Control Unit for Top
- Cabrio Top Preservative
- Folding Top Snaps Speedster
- Basic Cabriolet Top Adjustments
- Noisy Cabriolet Top Transmission Gears
- Care for Rear Window
- Modified Frame for Windshield
- Wiper Linkage Locknut
Ignition Distributor Specifications
Here you will find all the ignition distributor specifications listed under their Bosch part number. You can locate the bosch number usually printed on a label for cast iron ignition distributors or stamped into the case on aluminum distributors. If you are unsure as to which distributor you should have and you know the Porsche part number we have a cross reference guide listed in this document center under cross references.
911 Distributors 121 series
Twin Plug Distributors
911 Distributors 301 Series
911 Distributors 303 series
911 Distributors SC series
911 Distributors Marelli
930 Distributors 302 Series
CIS Warmup Regulators
Warm up regulator specifications are listed under their Bosch part numbers. This number will be stamped on the warm up regulator housing. We have also listed the year range of cars that they should fit.