Beta 1461/C16 Instrucciones página 8

Timing Adjustment
Camshaft timing adjustment is achieved by releasing
the camshaft sprocket screws and adjusting the
position of the camshafts using D551 Camshaft
Setting Plate and D552 Camshaft Plate Locking Tool.
To gain access to the camshaft sprockets it will
probably be necessary to release the engine mounting
bracket to the Hydramount and raise the engine.
With the crankshaft positioned at TDC and with Pin
D146-2 in place in the flywheel, counter-hold each
camshaft in turn, with a spanner, at the hexagon
provided on the camshafts, whilst releasing the
camshaft sprocket screws.
Discard old screws and fit new ones to retain
sprockets loosely on the camshafts.
IMPORTANT: When adjusting camshaft timing the
camshaft sprockets should be free to rotate but should
not be able to tilt.
Cam Plate Locking Tool securing Setting Plate on
inlet camshaft.
Fit the D552 Camshaft Plate Locking Tool by securing
its base to the engine, but with its top clamping arm
remaining loose.
Carefully align the inlet camshaft to allow D551
Setting Plate to be fitted, ensuring the Plate rests fully
on both sides of the gasket surface. Clamp the D551
Setting Plate in place by fixing with the top clamping
arm of D552, and secure the arm tightly.
Counter-hold the inlet camshaft with a spanner at the
hexagon provided on the camshaft, and using a
suitable angle torque gauge, tighten the sprocket
screw to 20Nm. + a further 35°.
Secure Setting Plate on the exhaust camshaft.
Release the top clamping arm of D552, reverse D551
Setting Plate and position onto the exhaust camshaft
ensuring the Setting Plate rests fully on both sides of
gasket surface. Clamp firmly in place with D552.
Counter-hold the exhaust camshaft with spanner and
repeat the procedure as employed on the inlet
camshaft.
Remove Setting Plate Holding Tool, Camshaft Setting
Plate and Crankshaft TDC Pin and turn the crankshaft
two revolutions, in direction of normal engine rotation,
and return to TDC position at No1 cylinder.
Insert D146-2 TDC Pin in to the flywheel and check
both camshaft positions using D551 Plate as advised
in the 'Checking Timing' section of these instructions.
413 Tensioner Retaining Pins Set
For removal of camshafts, sprockets or timing chains,
the chain tensioner MUST BE 'locked back' releasing
tension off the timing chain.
With the engine 'locked' at TDC with Crankshaft
Location Pin D146-2, remove the chain tensioner
access plug from the timing cover and slowly turn the
exhaust camshaft clockwise to fully compress the
chain tensioner, and lock then 'lock' it with one of the
D413 Retaining Pins.
WARNING: If the camshaft sprockets are removed
without first locking the hydraulic chain tensioner,
its piston will eject. Considerable force will then
be required to compress it back in place.
1461/C16 Kit contains as a pair of D413 Tensioner
Retaining Pins as two pins will be required if the chain
tensioner is to be completely removed from the
engine.