Ferrari 308 Workshop Service Repair Manual (1973–1985)

Description

Factory Ferrari 308 Workshop Manual (1973–1985)

This factory-level service manual covers every production variant of the Ferrari 308 sold in North America and worldwide from 1973 through 1985, giving owners and technicians the detailed procedures needed to maintain and repair these mid-engine Italian classics.

Powertrain & Drive Coverage

Component	Variants Covered
Petrol	2.9L (2926cc) Dino V8 carbureted (4× Weber 40DCNF); 2.9L (2927cc) Tipo F105 AB Quattrovalvole V8; Bosch K-Jetronic fuel-injected V8 (GTBi/GTSi)
Diesel	N/A
Transmissions	5-speed manual transaxle
Drive	RWD
Model Years	1973–1985
Badge Twins	Dino 308 GT4 (1973–1976 cars carried Dino rather than Ferrari badging)

Common 308 Repairs Covered

System	Procedures
Cam Belt & Timing	Toothed cam belt inspection, tension adjustment, and replacement intervals — a critical service on the interference-design V8
Carburetor Synchronization	Balancing and jetting of four Weber 40DCNF carburetors; choke and idle circuit diagnostics on carbureted models
Bosch K-Jetronic Fuel System	Fuel distributor pressure testing, warm-up regulator service, and injector flow checks on GTBi/GTSi injection models
Rear Suspension & Transaxle Seals	Trailing arm geometry adjustment, differential output seal replacement, and transaxle rebuild procedures

Format & Delivery

PDF. Instant download; lifetime re-downloads.

Frequently Asked Questions

Which 308 body styles and variants are included in this manual?

Coverage spans the full 308 lineup: the 2+2 GT4 coupe (Dino-badged through 1976), the two-seat GTB berlinetta in both fiberglass and steel body forms, the GTS Targa, the fuel-injected GTBi and GTSi, and the Quattrovalvole four-valve models introduced for the 1982 model year. All chassis variations produced between 1973 and 1985 are documented.

Is the early Dino-badged 308 GT4 covered alongside the Ferrari-badged cars?

Yes. The 308 GT4 launched in 1973 wearing Dino badging before Ferrari rebranded it in 1976. This manual treats both badge periods as a single model line and provides continuous coverage from 1973 through the end of GT4 production in 1980, including all mechanical and electrical specifications relevant to those early cars.

Are complete wiring diagrams included for the fuel-injection and Quattrovalvole models?

The electrical section contains full schematics for every 308 generation, including the Bosch K-Jetronic injection circuits on the 1980–1981 GTBi/GTSi and the updated ignition and sensor wiring for the 1982–1985 Quattrovalvole. Connector pinouts, wire color codes, and component ground locations are all shown.

What format is the manual?

The manual is delivered as a fully searchable PDF. You can open it on any Windows or Mac computer, iPad, Android tablet, or smartphone using a standard PDF reader. Individual pages or sections can be printed for use at the workbench.