1982–1989 Ferrari 308 Quattrovalvole / 328 GTB GTS Engine & Transmission Workshop Manual (P/N 95990873)

Ferrari factory workshop documentation for the 1982–1989 Ferrari 308 Quattrovalvole, 328 GTB, and 328 GTS, identified as Cat. 550/89, Cod. N. 95990873. It covers general vehicle identification and the mechanical repair of the F 105 V8 and drivetrain.

Text search and chapter navigation: PDF text search is unavailable. Embedded bookmarks cover the main sections and many individual procedures. Part of the German legend on chassis drawing M9 is cropped.

• Engine repair: Crankcase, Nikasil cylinder-liner, crankshaft, piston, and connecting-rod inspections, with internal engine assembly procedures and model-specific clearance tables.

• Cylinder heads and timing: Valve-guide and seat work, valve-spring testing, camshaft-housing reaming, shim adjustment, timing-belt installation, and valve-timing checks.

• Lubrication and cooling: Gear-driven oil-pump inspection, oil-pressure checks, crankcase ventilation, centrifugal water-pump service, thermostat testing, and coolant filling and bleeding.

• Clutch and gearbox: Clutch-housing removal, pedal adjustment, gearbox overhaul and reassembly, synchronizer testing, and internal selector and external linkage adjustment.

• Differential and axle shafts: Plate-type limited-slip differential inspection, tapered-roller bearing preload adjustment, and LOBRO constant-velocity joint and boot checks.

• Workshop reference: Fluid capacities, wear limits, component torque tables, special-tool listings, and a chassis mounting-point drawing with a specific serial-number application.

The procedures suit technicians and experienced engine or transmission rebuilders who can interpret precision measurements and use the specified workshop fixtures.

F 105 Engine Repair and Valve Timing

The engine tables distinguish the standard F 105 A and U.S. F 105 A/40 for the 308 from the 328's F 105 C, U.S. F 105 C 040, and Swiss F 105 C 046. The tables separate bore/stroke, compression, and output specifications, with different main-bearing clearances for the two engine families.

Bench-work coverage includes crankshaft alignment and end float, connecting-rod weight classes, Magnaflux crack inspection, liner protrusion, and piston-ring fit. Engine cross-sections accompany the inspection and assembly material. The liner section explains why grinding Nikasil bores removes their protective surface treatment.

Cylinder-head repair extends to valve-guide replacement, seat refacing, and hydraulic leak testing after assembly. The 328 material adds its cylinder-head tightening procedure using the AV 1393 extension and USAG 830 angle tool.

Valve-timing diagrams and goniometer checks support camshaft setup. The timing-belt section also identifies premature belt failure as a consequence of retensioning used belts.

Lubrication and Cooling Service

The engine lubrication diagram locates the oil circuit, while separate 308 and 328 crankcase-ventilation drawings identify the vapor separator and return paths. Oil-pump clearances, the pressure-relief valve, filter specifications, and oil-level and change procedures are covered.

Separate cooling-system diagrams show the radiator, expansion tank, fan-control thermal switch, and bleed points. Water-pump inspection covers the impeller, bearings, and seals; thermostat coverage includes a heated-water test and bypass operation.

Water-pump drive-belt adjustment differs between the two models. The Gates 150 tensiometer is specified for the 308 water-pump belt; the 328 section describes its separate tensioner arrangement.

Clutch, Gearbox and Differential

The dry single-plate clutch section explains the constant-contact thrust bearing and its relationship to pedal adjustment. Clutch and flywheel wear specifications accompany the removal material.

Gearbox coverage includes standard, U.S., and Swiss ratio tables, shaft and bearing inspection, lubrication-pump checks, and internal control drawings. Separate synchronizer wear, clearance, and axial-load tests help distinguish friction-ring wear from weak springs when planning a gearbox repair.

The differential section addresses plate condition, crown-and-pinion inspection, shimming, and bearing preload, with different criteria for new and used bearings. LOBRO axle-shaft coverage includes CV-joint checks associated with rear-end noise or vibration and servicing after boot damage.

Tools, Torque Tables and Chassis Reference

The tool lists pair reference codes with ordering numbers, including valve-spring tool AV 1499 (95971499) and differential preload pulley AV 5067 (95975067). Torque tables extend to selected injection, brake, suspension, steering, and chassis fasteners.

The chassis mounting-point drawing on M9 applies to the 328 from chassis No. 76626. It identifies suspension and powertrain attachments. Page M8 is missing from this PDF.

Repair chapters concentrate on the engine and drivetrain; full fuel-injection, brake, steering, suspension, and electrical repair chapters and wiring diagrams are not included. Support the vehicle securely for under-car work; chassis mounting-point drawings are not lifting-point instructions.

Multilingual PDF and Included Pages

One printable PDF contains parallel English, Italian, French, and German text. The 115-page total already includes four preliminary pages: the cover, title/publication page, vehicle illustration, and section index.