The cam follower, or tappet, is used in the inlet guide block where there is no provision for an oil passage. The ‘R’ radius offers a slightly flatter profile for increased valve opening duration and is often paired with the E3134 profile camshaft. New production camshaft follower from Hepolite.Â
The genuine Hepolite precision machined tappet features a hardened surface for increased durability. Original factory specification for 1966-1972 T120 engines. The ‘R’ designation refers to the 1-1/8″ radius and is often called for when fitting aftermarket performance camshafts in the B-range Triumph engine. Made in the UK.
In almost all instances, when new camshafts are being installed, the manufacturer will specify the replacement of tappets showing any wear whatsoever. The R-radius inlet tappets can be used in the exhaust guide blocks on pre-unit engines with magneto ignition, as well as early unit-construction engines when mated with the appropriate camshafts.
The tappets require pre-lubrication with assembly lube when fitted to the guide block. It is recommended to secure the stems in the guide block with a zip tie or strong rubber band to prevent them from falling out into the engine cavity during installation of the cylinder barrel onto the crankcase.
