914 Tech Notebook
Click on thumbnail photos for larger images
I have collected these notes over the years and wanted to post them if they would help others.
Many of them I developed for myself as a maintenance or reassembly guide for my own 914s.
Some of these are not complete, and accuracy is believed correct, but not guaranteed.
Let me of know of any errors you find or missing info and I will make corrections.
A few of these were created by others and I have posted them here for reference,
but do not remember the author. If you know, tell me and I will give them credit.
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Item |
Description |
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GENERAL |
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914/4 Porsche Condition Assessment Form |
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914/4 Porsche Interchangeable and Substitute Parts |
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914/4 Porsche Quality Rating System |
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914/4 Porsche Required Maintenance and Lubrication Service |
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914/4 Porsche Required Maintenance - Emission Control System |
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914/4 Porsche Tightening Torques |
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914/4 Porsche Wheel Alignment Specifications |
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914/4 Porsche 2.0L See-Through Graphic |
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914 Porsche Cabin Air Forced Extraction |
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914 Porsche Engine Grille Letter Spacing |
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Optimization of Aerodynamic Aids for Autocross Racing By Khorsandian, Tse, Blanco, Apperley, Crummett Optimizing the 914s
Aerodynamics By Chris Cassidy and Students |
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REFERENCE MANUALS |
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PET Parts Manual 1 |
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PET Parts Manual 2 |
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PET Parts Manual 3 |
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Exploded View Parts Diagrams |
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Troubleshooting Guide for D-Jet Fuel Injection |
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Bosch VW-Porsche D-Jet Fuel Injection Manual |
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Volkswagenwerk AG D-Jet Fuel Injection Troubleshooting
Guide |
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D-Jet Fuel Injection by Kjell Nelin |
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De-Mystifying the Porsche 914's D-Jet Fuel Injection System by Stan
Cooper |
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Harold Glenn T3/T4 Volkswagen Fuel Injection Manual |
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Bosch D-Jetronic MPC Manual |
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Bosch D-Jet and L-Jet Fuel Injection |
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Bosch Volkswagen L-Jet Fuel Injection Manual |
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Bosch Gasoline Fuel injection System L-Jetronic
Manual |
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L-Jet Fuel Injection for 912E (also applies to 914 1.8L cars) |
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VPC Air Conditioning Installation Manual |
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DPD Air Conditioning Installation Manual |
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DPD Air Conditioning Owners Operating Instructions |
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ENGINE |
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Engine Weight From 1971 Service and Training Manual |
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Oil Filter Torque From 1971 Service and Training Manual |
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Oil Consumption Rate Tolerance From 1971 Service and Training Manual |
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Air-cooling thermostat |
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Air-cooling flaps: Cold engine position (minimum airflow over oil
cooler) |
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Air-cooling flaps: Warm engine position (maximum airflow over oil
cooler) |
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Factory engine performance comparison |
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Valve Adjustment Sequence Courtesy of John Larson
(“Cap’n Crusty”) |
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Technical Bulletin Head Gasket Deletion (Note, does not apply to 914 Porsche T4 engines. Will it work? Yes, but that was not its intent.) Courtesy of John Larson
(“Cap’n Crusty”) |
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FUEL INJECTION |
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Throttle Position Sensor – 1.7L/1.8L Calibration Courtesy of Mike Cooley Sr. |
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Throttle Position Sensor – 2.0L Calibration Courtesy of Mike Cooley Sr. |
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Altitude Compensator - L-Jet |
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Speed Limiter, 1975-76 2.0L (CA-only) From 1975 Service & Training Manual |
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D-Jet Electrical Test Values |
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Fuel Pump Circuit Troubleshooting Flow Charts Courtesy of Paul B.
Anders |
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Fuel Pump Circuit Troubleshooting D-Jet only I have no idea where I
found this! |
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Vacuum Leak Detection Method From the Bosch Guide |
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Vacuum Hose, 1.7L, 1970-71 Courtesy of Marc-Andre- Morin |
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Vacuum Hose, 1.8L - Early 1974 |
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Vacuum Hose, 1.8L - Late 1974 thru 1975 Courtesy of Pete Klager |
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Vacuum Hose, 2.0L - 1973 thru early 1974 Courtesy of Dave Darling |
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Vacuum Hose, 2.0L - Late 1974 |
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Vacuum Hose, Decel Valve and AAR, 2.0L -
1973 thru 1976 From 1973 Service & Training Manual |
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Vacuum Hose, Crankcase Ventilation, 2.0L - 1973-74 From 1973 Service & Training Manual |
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Vacuum Hose, Crankcase Ventilation, 2.0L - 1973-74 From 1973 Service & Training Manual |
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Vacuum Hose, Fuel Evaporation Control System From 1973 Emission Control System Manual |
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Fuel Hose, 1.8L 1974-75 (Same as 1970-73 1.7L) Courtesy of Pete Klager |
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Fuel Hose, 2.0L 1973-76 |
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Fuel Hose, Fuel Pump 1970-74 |
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Fuel Hose, Fuel Pump 1975-76 Courtesy of Pete Klager |
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Fuel Injector Substitutes |
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Air Plenum ID |
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Heat Exchanger ID |
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Muffler Hanger ID |
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914 Porsche Muffler ID by inlet dimension |
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TRANSAXLE |
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Transaxle Specifications |
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Clutch Tube Repair at Shifter |
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Flywheel Resurfacing Dimensions |
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Shift Linkage Adjustment |
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ELECTRICAL |
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12-pin connector |
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14-pin connector |
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Center Console Gauges |
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Center Console Harness |
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Center Console Wiring 1971-72 |
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Center Console Wiring 1973-76 |
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Coil |
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Dash Gauges |
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Oil Temp Gauge Calibrations |
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Distributor |
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Front Turn Signals |
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1973 Fuse Index Courtesy of Steve Madsen |
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1974 Fuse Index |
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Ground Points |
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H4 Headlight Substitute |
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Lamp Index |
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Rear License Plate Lights |
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Regulator Plate |
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Regulator Plate Circuitry |
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Regulator Plate FI Harness Power |
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Relays - Main fuse panel |
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Relays - Seatbelt Interlock |
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Relays - Seatbelt Interlock Relay Bypass |
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Tailights |
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Interior |
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Backpad Light ID Courtesy of Dave Wakashima |
