Camshaft / Camshaft Bore Inspection; Cylinder Head Removal; Cylinder Head Cleaning - Polaris 2009 Sportsman XP 850 Service Manual

ENGINE

Camshaft / Camshaft Bore Inspection

1. After camshaft carrier is removed, lift camshaft from
cylinder head. Inspect all main journals and cam lobes as
described below and compare to specifications (See
"Engine Specifications - EH085OLE-011" on page 5.5).
Replace if worn beyond service limit or if any surface is
pitted or damaged.
2. Measure all cam lobe heights from base circle to highest
point on lobe.
3. Temporarily install camshaft carrier as shown below to
measure the camshaft bore. Replace cylinder head if worn.
1. Snug all bolts
2. Torque in sequence
3. Measure
5.28

Cylinder Head Removal

1. Loosen two outer bolts (A), then loosen all head bolts (B)
evenly, 1/8 turn at a time following the pattern below (6, 5,
etc.) until all are loose. Remove all bolts, cylinder head,
and gasket.
NOTE: Head can be removed from cylinder /
crankcase without removing cam carrier (C) but the
center two cylinder head bolts cannot be removed
from the head unless carrier is removed.

Cylinder Head Cleaning

Thoroughly clean cylinder head surface to remove all traces of
gasket material and carbon.
NOTICE
Use care not to damage gasket sealing surface.
All gasket surfaces must be clean, dry, and free
of any oil or grease upon assembly.
Clean sealing surfaces with rubbing alcohol,
electrical contact cleaner or a brake cleaner that
does not leave a solvent residue. Do not touch
sealing surfaces of the new head gasket.
B
A
C