Service manual

G420F(FE) Service Manual Chapter 3. Engine Mechanical System 46
Assembly
1. Install the crankshaft sprocket taking care of
installation direction as shown in the illustration.
2. Install the camshaft sprocket and tighten the bolt
to the specified torque.
Camshaft sprocket bolt 10 ~ 12kg·m
3. Install the idler and tighten the bolt to the
specified torque.
Idler fixing bolt 4.3 ~ 5.5kg·m
4. With no.1 cylinder piston to the dead point of
compression stroke, align the timing mark on the
camshaft sprocket and timing mark on the
crankshaft sprocket.
1) After installing the tensioner, spring and spacer
and tightening the bolt temporarily, tighten the
long hole shaft washer of tensioner and bolt.
2) Install the spring bottom end to the front case
as shown in the illustration.
3) Install the flange and crankshaft sprocket
taking care of installation direction and then
tighten the washer and bolt temporarily.
4) When aligning the timing marks, after turning
the cam-shaft sprocket to place the red timing
mark on the cam cap in the middle of the
knock pin 4.5 bore, align this timing mark with
the timing mark on the front case by rotating
the shaft sprocket.
5) Install the belt with the timing aligned as shown
in the illustration. (When installing, start from
the belt tension side and then install the belt by
pressing the tensioner.
CAUTION
When no.1 piston is at TDC, if the camshaft
sprocket mark is not aligned with head mark,
interference between piston and valve occurs.
So take care of timing aligning.
6) Install the timing belt not to loosen in the
following order.
Crankshaft sprocket (A) → Idler pulley (B) →
Camshaft sprocket (C) → Timing belt tensioner (D).
(After installing timing belt, auto tensioner may be
installed)