Contents

Maintenance

J6R and J7T gasoline in-line engines

• Specifications
• Valve actuator - adjustment
• Camshaft timing belt - removal
• Toothed belt - installation
• Toothed belt tension adjustment
• Cylinder head removal
• Cylinder head disassembly
• Valve seats - lapping
• Cylinder head assembly
• Yoke axis - removal and installation
• Cylinder head - installation
• Cylinder liners - replacement
• Connecting rod-piston assembly - assembly
• Cylinder liners - check installation
• Connecting rod-piston group - assembly
• Engine - removal and installation
• Engine - disassembly and assembly

V6 engine (Z7V)

• Specifications
• Cylinder head - general description
• Camshafts and valves
• Camshaft drive chains - replacement and inspection

Diesel engines

• Specifications
• Timing belt - replacement and adjustment
• Cylinder head removal
• Cylinder head - inspection and repair
• Lapping valve seats
• Rocker shaft - disassembly, repair and assembly
• Checking the piston-cylinder head clearance
• Cylinder head - installation
• Engine - removal
• Engine - installation
• Engine disassembly
• Connecting rod-piston group - disassembly
• Connecting rod-piston group - assembly
• Control inspection and adjustments
• Engine - assembly

Lubrication system

• Specifications
• Checking oil pressure
• Oil pump (engines J6R, J7T, Z7V) - removal and installation
• Pallet (diesel engines) - removal and installation

Cooling system

• Specifications
• Draining fluid from the system
• Filling and draining
• Radiator - removal and installation
• Water pump - removal and installation
• Air distributor and heater box - removal and installation

Power supply and exhaust system - petrol models

• Specifications
• Fuel injection system - general description
• Air-fuel mixture formation (J6R engine) - general description
• Launcher - general description
• Checking the functioning of the PCH system
• Starting device - adjustment
• Throttle clearance - adjustment
• Checking the float level
• Idle speed adjustment
• Checking the fuel pump pressure
• Fuel injection (J7T engine) - general description and adjustment
• Checking the injection system
• Throttle body - removal, installation and adjustment
• Exhaust system

Fuel and exhaust system - diesel models

• Specifications
• Bosch fuel equipment
• High pressure pipelines - pumping
• Fuel filter - changing and cleaning
• Low pressure piping - check
• High pressure fuel pump (TNVD) - removal and installation
• High pressure fuel pump - adjustment
• Thermostatic module - removal, replacement and adjustment
• Roto-diezel fuel equipment
• Supply pipelines - bleeding
• Fuel filter - changing and cleaning
• Power piping - check
• High pressure fuel pump (TNVD) - removal and installation
• High pressure fuel pump - adjustment
• Adjustment check
• Adjusting idle speed on a cold engine
• Checking the travel stop
• Adjusting idle speed with a warm engine
• Checking the maximum speed mode
• Turbocharger - removal and installation
• Exhaust system

Ignition system

• Specifications
• General description
• Possible malfunctions in the electronic ignition system "Renix"

Clutch

• Specifications
• Clutch basket - removal and installation
• Hydraulic drive
• Master cylinder - removal and installation
• Slave cylinder - removal and installation

Mechanical transmission

• Specifications
• Mechanical transmission NG
• General description
• Gearbox - removing and installing gearbox
• Gearbox - disassembly and assembly
• Manual transmission UN1
• Gearbox - removal
• Gearbox - installation
• Gearbox disassembly
• Gear shift mechanism - disassembly and assembly
• Differential bearings - adjustment
• Gearbox - assembly

Automatic transmission

• Specifications
• General description
• Removing an automatic transmission
• Assembling an automatic transmission
• Checking the oil level
• Checking oil pressure
• Checking the vacuum sensor
• Removing electrical valves
• Installation of electric valves
• Removing the shift cable
• Installing and adjusting the shift cable

Drive shafts

• Specifications
• Drive shaft - removal
• Drive shaft - Installation
• GI 76 hinge - replacing the protective sleeve and the inner hinge on the box side
• GI 82 hinge - replacing the protective sleeve and the inner hinge on the box side
• GE 86 hinge - replacing the protective cover on the wheel side
• CV JOINT Lobro - replacement of the joint or cover on the wheel side

Braking system

• Specifications
• Front brakes
• Brake pads - replacement
• Front brake disc - removal and installation
• Rear brakes
• Rear brake drum - removal and installation
• Bracket - removal and installation
• Brake caliper - repair
• Bendix rear brake pads - replacement
• Adjusting the automatic gap selection system
• Girling rear brake pads - replacement
• Master cylinder - removal and installation
• Vacuum booster - check, removal and installation
• Vacuum booster air filter - replace
• Check valve - replace
• Checking the vacuum pump (diesel engines only)
• Pressure regulator - check and adjust
• Pressure regulator - removal and installation
• Pressure regulator - replacement
• Handbrake - adjustment
• Bleeding the brake system

Steering and suspension

• Specifications
• Steering housing - removal and installation
• Steering joint - removal
• Steering pivot - installation
• Push rod adjustment
• Steering wheel - removal
• Steering wheel - installation
• Steering column - adjustment
• Power steering - general description
• Power steering pump - removal
• Power steering pump - installation
• Control valve - general description
• Control valve - removal
• Control valve - installation
• Checking fluid pressure
• Filling the system
• Power steering pump belt - check tension
• Front shock absorber - removal and installation
• Front spring - removal and installation
• Trailing arm - removal and installation
• Checking the adjustment and control dimensions of the front suspension
• Steering knuckle caster
• Wheel alignment
• Steering knuckle - removal and installation
• Upper arm - removal and installation
• Lower arm - removal and installation
• Front hub bearing - replacement
• Rear shock absorber - removal and installation
• Rear spring - removal and installation
• Rear camber bar - removal and installation
• Trailing arm - removal and installation
• Rear wheel alignment check
• Hubs
• Hub bearing - replacement

Electrical system

• Specifications
• Generator - removal and installation
• Belt tension - adjustment
• Generator - disassembly and assembly
• Voltage - check
• Starter - removal and installation
• Starter - inspection
• Wiper mechanism - removal and installation
• Wiper motor - removal and installation
• Dashboard - removal and installation
• Headlight adjustment

Application

• Part A: Design changes
• Renault 25TS, 25GTS, 25TX and 25GTX (4-cylinder petrol engine since 1985)
• Specifications
• General description
• Engine
• Clutch
• Gearbox
• Drive shafts
• Steering
• Front suspension
• Rear suspension
• Braking system
• Electrical system
• Service program
• Part B: Development of Renault 25 models TS, GTS, TX, GTX (4-cylinder engines) since 1988
• Specifications
• General description
• Engine
• Clutch
• Gearbox NG3
• UN1 gearbox
• Automatic transmission MJ3
• AR4 automatic transmission
• Drive shafts
• Steering
• Front suspension - removal and installation
• Rear suspension
• Braking system
• Electrical equipment
• General data
• Development of the Renault 25 with 4 cyl. petrol engine since 1991

Wiring diagrams