Polaris 2009 Trail Boss 330 Service Manual page 83

The following procedure must be used to torque the
cylinder head properly:
Torque in cross
pattern per procedure
Torque
5-6.5 ft. lbs.
(7--9 Nm)
Torque all bolts evenly in a cross
pattern. Apply oil to bolt threads
*Torque bolts to 18 ft. lbs. (24.5 Nm)
*Loosen bolts evenly 180° (1/2 turn)
*Torque bolts to 11 ft. lbs. (14.7 Nm)
*From this point, tighten bolts evenly
90° (1/4 turn)
*Finally, tighten another 60° (1/6 turn)
Torque 6mm case bolts to 5- -6.5 ft. lbs.
CAM CHAIN/CAMSHAFT
INSTALLATION
CAUTION: Serious engine damage may result if
the camshaft is not properly timed to the
crankshaft.
( 7- -9 Nm )
Install the cam chain over the crankshaft.
Sprocket
Mark
IMPORTANT CAMSHAFT TIMING NOTE: In order
to time the camshaft to the crankshaft, the piston must
be precisely located at Top Dead Center (TDC). This
can be accomplished using one of two methods.
When the stator assembly is removed, follow the
procedure outlined in Method 1. This method uses
the cam chain plate links to time the camshaft and the
dot on the cam chain drive sprocket to establish TDC
(see below, Method 1). It is important to note that this
method can only be used when the stator is removed
and the cam chain drive sprocket is in view. The plate
links are not used to time the camshaft when the
flywheel is installed.
When the stator assembly is installed, use Method 2.
This method establishes accurate Top Dead Center
(TDC) by aligning the single mark on the flywheel with
the notch in the timing inspection hole (see Method 2,
Page 3.40). The camshaft sprocket alignment marks
are parallel to the gasket surface, the alignment pin
faces to the intake side, and camshaft lobes are
pointing down.
Camshaft Installation - Timing Method 1
Refer to Illustration Page 3.39
If the stator assembly is removed: NOTE: Use this
method only when the stator is removed and cam
chain drive sprocket is in view.
1. Rotate the crankshaft until the mark on the cam
chain drive sprocket is aligned with the crankcase
projection (mark facing downward).
2. Align the single plated link on the cam chain with
the marked tooth of the cam chain drive sprocket.
Use a wire to pull the chain up through the cylinder
and cylinder head, and secure it to hold the chain
in place.
ENGINE
Plated
Link
Crankcase
Projection
3.37