Camshaft (1) in top heads (2)

Description 1036G

1.3 JTD

CAMSHAFTS

Cast iron, tempered and hardened on the cams.

CAMSHAFTS

The exhaust camshaft is driven directly by the chain and transmits motion to the inlet camshaft via a pair of straight toothed gears.

The exhaust camshaft also drives the high-pressure pump, while the inlet camshaft drives the vacuum unit.

TAPPETS

There is a hydraulic tappet for each valve activated by a rocker arm, in turn, moved by the camshaft.

The rocker arms are designed to prevent serious damage to the other engine components if the timing belt breaks or comes off; in effect, on account of their special design the absorb the stresses caused through the contact between the valves and the pistons.