1968–1973 Ferrari 365 & 330 GTC Owner’s Manual Collection

Use the USA supplements alongside their corresponding standard handbooks. The 365 GTC/GTS variations supplement likewise refers back to the included 330 GTC handbook for unchanged information.

For gearbox removal, inspection, and refitting, the earlier GTB/4 handbook refers to a separate 330 GTC workshop manual; that workshop publication is not part of this collection.

PDF Bookmarks, Wiring Detail, and Included Pages

Search, navigation, and diagrams: PDF text search is not available. Embedded bookmarks provide access to the individual handbooks and many sections. Small wiring labels require zooming, and some BB wire codes remain faint.

One printable, 871-page PDF contains the standard handbooks in Italian, French, and English, plus English-language USA supplements. The total includes the original covers, unnumbered pages, and the 17 repeated GT4/2+2 appendix pages listed above.

Timing Drives, Weber Setup, and Chassis Service

The following selected contents show the main service areas; other topics include emergency headlamp raising and wheel changing.

• Engine maintenance: BB toothed timing-belt tension adjustment, GTB/4 valve-clearance checks and timing-chain adjustment, with related valve-gear illustrations.

• Weber carburetors: Model-specific setting tables, GTB/4 throttle synchronization, and GTC/4 USA mixture checks using vacuum gauges and an exhaust-gas analyzer.

• Brakes and chassis: Brake-pad inspection, hydraulic bleeding, handbrake adjustment, suspension geometry, and steering service information for the applicable models.

• Lubrication and cooling: Service-point charts, fluid-capacity tables, cooling-circuit layouts, thermostat information, and accessory-drive belt checks.

• Ignition and wiring: Dinoplex component identification, distributor advance curves, fuse and relay charts, and model-specific wiring diagrams.

• USA equipment: Fast-idle devices, air-injection and evaporative-emission systems, distributor microswitch checks, and air-pump clutch control.

Owners can use the operating instructions and maintenance schedules; the handbooks direct specialist adjustments, including emissions calibration, to Ferrari-appointed dealers.

BB Belt Drive and GTB/4 Valve Gear

The F102A engine section explains shim-selected valve clearances and toothed timing-belt tension. Its camshaft-drive layout identifies the drive gears, idlers, and tensioners for the F102AB chassis application.

The GTB/4 handbooks contain step-by-step procedures for checking valve clearances and adjusting timing-chain tension. Their instructions distinguish the clearance used for checking valve timing from the clearance specified for normal operation.

Weber Settings and USA Emissions Checks

The BB pages provide jet sizes, float-level specifications, and preliminary checks for Weber 40 IF 3C/1-2-3-4 carburetors. They assign synchronization to a Ferrari service station. The GTB/4 material goes further into throttle balancing for Weber 40 DCN 20 and 40 DCN 21 carburetors using a Motometer airflow gauge.

The GTC/4 USA supplement describes mixture balancing, fast-idle adjustment, distributor microswitch testing, and air-pump clutch checks. Its special-tool illustration identifies mercury gauges, a CO analyzer with a heat exchanger, a protractor, and an ohmmeter.

These market-specific instructions help a technician select the appropriate ignition and emissions checks before adjusting the car.

Lubrication, Cooling, and Cabin Air

Model-specific lubrication charts identify service points and factory fluid specifications for the engine and drivetrain. They provide a reference for planning routine maintenance and checking which lubricant applies to each assembly.

The BB Cooling layout shows the expansion tank, thermostat, heat exchanger, and electric fans. Its Heating and ventilation system layout explains the cabin airflow arrangement, alongside air-conditioning operating and maintenance information.

Brake Circuits, Steering, and Suspension

The braking-system diagrams show the hydraulic circuits and vacuum assistance. GTB/4 bleeding instructions identify the separate caliper bleed points, while the chassis sections cover clutch adjustment, gearbox and differential lubrication, suspension geometry, and steering checks.

The BB material covers rack-and-pinion steering and independent suspension. The GTC/4 and GT4/2+2 sections also describe hydraulic power-steering fluid replacement and bleeding.

The BB brake-service warning explains that petroleum-based solvents can damage the hydraulic cylinder seals.

Dinoplex Ignition and Electrical Fault Tracing

The BB ignition section identifies the Marelli AEC 104 BK Dinoplex unit and supplies the distributor’s automatic advance curve. Fuse and relay charts, component legends, and wiring diagrams help trace a circuit between its protection device and connected equipment.

The BB handbook warns that interrupting the battery connection while the alternator is operating can immediately damage the Dinoplex unit.

Work on these ignition, brake, and fuel systems involves high voltage and pressurized fluids; observe appropriate workshop precautions and provide ventilation.

A Preview of BB Clearances and Fluid Capacities

For the Berlinetta Boxer, the cold-engine intake valve clearance is 0.008–0.010 inches. The brake section specifies pedal free travel of 0.32–0.40 inches, with related guidance for investigating excessive travel or a spongy pedal.

The BB fluid table lists 12 liters for the engine oil sump and filters and 22 liters for the cooling system. These capacities belong to the BB handbook and should not be applied across the other models in the collection.