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Renault 5 Turbo — Official Bosch K-Jetronic Injection
Technical manual • Air flow sensor plate • Fuel distributor • Regulation • C7K engine 160 hp DIN
Bosch K-Jetronic
Mechanical injection
C7K 1,397 cm³
Garrett T3
Complete manual — 1980
Presentation of the Renault 5 Turbo K-Jetronic injection manual
The Renault 5 Turbo K-Jetronic injection technical manual is the Bosch reference document detailing the operation and adjustment of the C7K engine's fuel supply system. Unlike electronic systems, theBosch K-Jetronic injection is an entirely mechanical and hydraulic system: the quantity of fuel injected is continuously regulated by the air flow sensor plate, with no electronic control unit.
This manual covers the entire fuel supply circuit of the R5 Turbo: from the sensor plate to the fuel distributor, via the control pressure regulator, the Bosch injectors and the cold-start system. It is essential for any workshop working on the R5 Turbo injection parts or carrying out mixture adjustment on the 160 hp DIN C7K engine.
General technical characteristics
Manual reference
| Document type | K-Jetronic injection technical manual |
| Publisher | Bosch / Renault |
| Publication date | 1980 |
| Model covered | Renault 5 Turbo — 840-730 / C7K R8221 engine |
| Application period | 1980 – 1986 |
Full K-Jetronic injection technical manual
Contents of the technical bulletin
This Bosch K-Jetronic manual covers all the components of the Renault 5 Turbo C7K engine injection circuit:
| Chapter | Contents |
| Operating principle | Continuous mechanical injection • Pressure / flow regulation |
| Air flow sensor plate | Air flow sensor • Metering cam • Maintenance and adjustment |
| Fuel distributor | Metering pistons • Differential valves • Permissible leaks and clearances |
| Control pressure regulator | Hot / cold regulation • Checking the pressure curve |
| Bosch injectors | Opening pressure • Flow test • Sealing |
| Cold-start injector & thermo-time switch | Cold-start injector • Thermo-time switch control |
| Electric fuel pump | Pump flow and pressure • Checking |
| Fuel return circuit | Pressure accumulator • Return to tank |
C7K Turbo engine specifications
| Parameter | Value |
| Engine | 840-730 / C7K (code 8221) |
| Displacement | 1,397 cm³ |
| Bore × Stroke | 76.00 × 77.00 mm |
| Turbocharger | Garrett T3 – A/R 0.36 |
| Injection | Bosch K-Jetronic |
| Power | 160 hp DIN |
| Gearbox | 5-speed — type 369 |
Continuous mechanical
5.0 bar
3.4–3.8 bar
4 × Bosch
None (mechanical)
1980 – 1986
Additional Renault 5 Turbo technical documents
To complement this injection manual, find all the Renault 5 Turbo technical documentation available on the site:
| R5 Turbo MR221 repair manual | R5 Turbo 2 technical manual |
| Renault 5 Turbo update notice | R5 Turbo owner's handbook |
| Front/rear axle suspension adjustment | Wishbone bush guide |
For a complete restoration of the C7K fuel circuit, also find the K-Jetronic sensor plate O-ring, the R5 Turbo sensor plate hose and the200hp R5 Turbo intercooler available in stock.
Looking for parts for your Renault 5 Turbo?
C7K engine, Garrett T3 turbo, K-Jetronic injection, suspension, braking — our catalogue covers all the components of the R5 Turbo.