Running Adjustments; Valve Seat Attention; Contact Breaker Points - Triumph Spitfire MK3 Handbook

RUNNING ADJUSTMENTS

60
RUNNING ADJUSTMENTS

Valve Seat Attention

Occasionally have the compression pressures checked by
your Triumph Dealer. Providing the engine is functioning
satisfactorily, and the compression pressures of all the cylinders
are equal, you are advised not to disturb the engine.
The need for decarbonising arises when the build-up of
carbon, a product of combustion, becomes excessive. If premium
grade fuels and high quality lubricants are used in modern high
compression engines, carbon deposit is so minimised that
frequent decarbonising is unnecessary. Carbon removal may,
therefore, be restricted to occasions when the cylinder head is
removed for attention to the valves and seats.
Contact Breaker Points (Fig. 94)
With the cap and rotor arm removed. turn the engine until the
contact breaker lever is operating on the highest point of the cam
lobe, i.e., gap at its widest. Slacken the fixed contact screw (2)
and turn the eccentric screw (3) to obtain 0.0l5" (0.4 mm.)