1973–1980 Ferrari Dino 308 GT4 Workshop Manual (P/N 95990809)

Ferrari Dino 308 GT4 (1973–1980) workshop manual for the F106 AL chassis and F106 A V8 engine, identified as Part No. 95990809, Batch No. MP2158. The printed edition is a MAR Parts Ltd. reprint for owners, issued after original factory stocks were exhausted.

Supplied as one 209-page PDF.

• Engine repair: Fault diagnosis, internal inspection and reassembly, valve-shim and timing-belt work, ignition timing, and bench running-in checks.

• Fuel, lubrication and cooling: Weber carburetor synchronization, mixture checks, oil-pump inspection, water-pump service, and cooling-system filling.

• Clutch and drivetrain: Clutch-control adjustment, gearbox synchronizer inspection and assembly, shift-linkage adjustment, and limited-slip differential service.

• Steering, suspension and brakes: Rack-and-pinion adjustment, wheel alignment, Koni shock absorber setting, caliper inspection, and hydraulic brake bleeding.

• Electrical diagnosis: Charging and starter tests, distributor synchronization, automatic-advance checks, and circuit diagrams for specific systems.

• Air conditioning and body: Pressure/temperature diagnosis, evacuation and charging, door and glass service, interior removal, and paint repair.

The internal rebuilding procedures and bench-test requirements suit mechanics experienced in precision engine and drivetrain work with access to specialist test equipment.

Engine Inspection, Valve Timing and Reassembly

Fault charts address starting, stalling, loss of power, misfires, mechanical noise, vibration, and oil-pressure problems. Internal repair material covers the crankcase and cylinder liners, pistons and connecting rods, crankshaft and main bearings, plus cylinder heads, valve guides and springs.

Camshaft and valve-clearance-pad work continues through final engine assembly and bench running-in. Inspection tables give fits, clearances, wear limits and balance checks; head-tightening sequences accompany the assembly procedures.

Engine longitudinal and cross sections, the camshaft-drive layout, and the timing-checking diagram support this work. Timing-belt cautions cover damage from belt misalignment and the different camshaft positions assigned to inner- and outer-edged pulleys.

Weber Carburetors, Cooling and Emission Controls

Lubrication coverage includes oil-pump clearances and the closed crankcase emission-control system. Cooling service addresses water-pump and belt checks, the radiator, thermostat, electric fans and system filling.

Fuel-pump service accompanies the Weber 40 DCNF 35/36/37/38 material, which explains operating circuits, factory setting data, float-level adjustment, throttle balance, synchronization, and cylinder-by-cylinder mixture checks.

Section O provides separate carburetor setting data, fast-idle adjustment, and service information for air-injection pumps and diverter valves. Evaporative-system coverage follows the three-way valve, activated-carbon trap and liquid-vapor separator.

Clutch, Gearbox and Differential Repair

Clutch fault diagnosis follows the mechanical control, release mechanism, flywheel, driven plate and pressure plate.

The gearbox section covers five forward gears and reverse, floating-ring synchronizers, gear and bearing inspection, synchronizer wear and load checks, internal assembly, and linkage adjustment. A gearbox assembly section view identifies the internal components.

Rear-axle repair includes crown-and-pinion inspection, bearing preload, seals and axle shafts. Differential section views distinguish units through gearbox No. 692 and from No. 693. Changing between them also requires replacement of the crown gear and gearbox layshaft, helping identify compatible assemblies before ordering parts.

Steering, Suspension and Brake Service

Rack-and-pinion diagnosis and clearance adjustment accompany inspection of front and rear wishbones, flexible bushings, ball joints and wheel bearings. Alignment procedures cover camber, toe-in, caster and wheel-setting checks, with front and rear suspension cross sections.

Koni shock absorber material explains compression and rebound operation, inspection, setting and rating diagrams.

Brake chapters address the dual hydraulic circuits, calipers, servo, parking brake, pedal free travel, disc and pad inspection, and pad replacement. Wheel balancing, tire service and fault charts are also covered.

The brake-cleaning warnings identify gasoline, diesel fuel and chlorinated solvents as potential causes of hydraulic cylinder seal damage.

Charging, Ignition and Electrical Circuits

Battery and alternator checks accompany starter-motor diagnosis and maintenance. Ignition coverage includes coils, spark plugs, distributor synchronization and automatic-advance testing, with Marelli S 159 A data in the main section and S 159 B procedures in the emission-control chapter. The latter also covers distributor-microswitch operation and adjustment.

Retractable-headlamp service and alignment, radio installation, fuse and relay locations, vehicle component identification, wiring-diagram legends and cable-color references are included.

Electrical illustrations cover alternator, voltage-regulator, ignition and radio circuits, plus fuse/relay and vehicle-component layouts. The seat-belt warning circuit shows the change from car No. 10178. Full-vehicle foldout schematics are not included.

Air Conditioning and Body Repairs

The Borletti Freon 12 system coverage includes efficiency testing, pressure/temperature diagnosis, Aspera Frigo HG 700 AP compressor and electromagnetic clutch service, evacuation, charging, leak checking and belt adjustment. Heating and ventilation operation and fault diagnosis are also covered.

Body procedures address doors, fixed and sliding glass, windshield and rear-window installation, the front hood and engine cover, bumpers, instrument panel, seats, upholstery and paint repair.

Structural chassis work is referred to Ferrari service. The Chassis Hitch Points page contains only a heading.

Service Tables and Special Tools

Reference tables collect component-specific tightening torques, capacities, alignment data, inspection limits, electrical test values and air-conditioning diagnostic charts.

Special-tool references cover engine, clutch, gearbox, differential, steering and suspension work. Examples include 706-AS-9560/9560A for valve-shim removal and 706-AS-9561 for shift-fork alignment.

Brake, suspension, electrical and air-conditioning repair requires proper vehicle support, electrical isolation, hydraulic pressure relief and approved refrigerant equipment as applicable.

File Contents and Readability

The page count includes one opening cover, one title/section-index page, and 22 pages in Section O, including the seat-belt circuit update. Three repeated pages (G6, G7 and I10) are also counted. Printed page I5, listed for wiper and horn information, is absent.

Search and navigation: Technical pages do not support PDF text search. There are no embedded PDF bookmarks; linked section and chapter indexes provide navigation.

Diagram readability: Small circuit labels require zooming. Some very fine terminal markings remain indistinct.