Service Guide: TR7
How to keep your sporting wedge in perfect order
Keep your ‘Wedge’ in fine fettle.
Model evolution
The all-new TR7 broke free from the gentle evolution of the TR models built from the early Fifties. Launched in 1976, it was stylistically and technically very different. Harris Mann’s styling was a quantum leap from the traditionally-styled TR6, though whether it was a leap backwards or forwards is in the eye of the beholder.
Unitary construction was a step towards modernity, but a live rear axle was archaic compared to the TR6’S independent setup. Under the bonnet was a twin-carburettor 1998cc eight-valve straight-four engine derived from the Dolomite’s. It launched as a fixed-head two-seater, but a convertible was offered in Britain from 1980.
Variations on the theme included the Rover V8-powered TR8 and the 16-valve TR7 Sprint – a low-production homologation special with a Dolomite Sprint engine.
Many standard TR7S have retrospectively gained these engines, however.
Production began in Speke, moved to Canley in 1978, moved to Birmingham in 1980 and ended in 1981. Alterations across the model’s life were largely cosmetic, so maintenance procedures are more-or-less identical for all model years. Transmissions are an exception. Four- and five-speed manual gearboxes and a three-speed automatic were offered, and their lubricants and filler plug locations differ. Some models were fitted with power steering, too.
What’s it like to work on?
The TR7 is an easy classic to look after, with a readily-accessible four-cylinder engine and simple longitudinally-installed drivetrain. Accessing the distributor is complicated by its awkward position below the bulkhead. Harder jobs include renewing the timing chain and removal of the cylinderhead.
Parts and support
Almost all TR7 parts are readily available from a wide range of suppliers, so pricing is competitive. Many clubs offer enthusiastic support, including Club Triumph, the Triumph Sports Six Club, the TR Drivers Club, the TR Register and the Triumph Wedge Owners Association.
Bedtime reading
British Leyland’s own ‘Workshop and Maintenance Manual’ for the TR7 is extremely comprehensive.
Thanks to Mark Denton, owner of the wonderfully original TR7 in our photographs. Ray Adnams of Park View Motors, Finchampstead, for expert assistance.