1966-1973 Triumph GT6 Workshop Manual Supplement (P/N 545048)

• Covers 1966–1973 Triumph GT6 and Vitesse 2-litre models (Mk. 1, Mk. 2, Mk. 3, and Vitesse Mk. 2), detailing factory emission control configurations
• Official Triumph publication Part Number 545048, 1st edition supplement
• Features 47 exploded-view assembly diagrams
• Includes 15 dedicated tightening torque tables covering the engine, suspension, and chassis
• Provides specific technical data for servicing 1968-onward US-market emission systems previously excluded from standard editions

Inside the Supplement

When maintaining classic British drivetrains, having accurate factory data eliminates the guesswork. This supplement targets the specific mechanical updates and emission control equipment introduced for the Triumph GT6 and Vitesse line. It breaks down complex assemblies into logical groupings, allowing technicians to quickly reference engine modifications or locate obscure serial number prefixes and paint codes during a complete restoration.

You will find detailed adjustment parameters for SU side-draft carburetors, precise distributor settings, and strict valve timing figures. Because working on vintage vehicles carries inherent physical risks—especially around pressurized fuel delivery and high-voltage ignition systems—technicians must adhere to standard shop safety protocols and employ proper protective gear at all times. The documentation also outlines unique US-market requirements, pinpointing exact camshaft profiles, specialized cylinder head configurations, and the updated crankshaft pulley timing marks required to maintain factory-correct performance.

Specification Highlights

Engine component specifications are clearly mapped out for precision assembly and wear inspection. You get the exact numbers directly from the factory. Cylinder head bolt torque is specified at 65–70 lb-ft for GT6 Mk. 2 blocks. Intake valve clearances are strictly held to 0.010 inches, while the GT6 Mk. 3 distributor contact gap requires a precise 0.015-inch setting. Fluid capacities are clearly documented, noting 13.2 pints for the Vitesse 2-litre cooling system. These tolerances reflect exactly how the manufacturer originally engineered the vehicle, providing a reliable reference framework for evaluating parts wear and conducting accurate, period-correct rebuilds.