Polaris SPORTSMAN 400 2003 Service Manual page 70

Lobe height
Cam Lobe Height (Intake & Exhaust):
Std: 1.2884-1.2924I (32.726-32.826 mm)
Limit: 1.2766I (32.426 mm)
3. Measure height of each cam lobe using a
micrometer. Compare to specifications.
Journal O.D.
Camshaft Journal O.D.:
Mag & PTO End: 1.4935-1.4941I
(37.935-37.950 mm)
4. Measure camshaft journal outside diameter
(O.D.)
5. Measure ID of camshaft journal bore.
Camshaft Journal I.D.:
Mag & PTO End: 1.4963-1.4970I
(38.005-38.025 mm)
Calculate oil clearance by subtracting journal OD
from journal bore ID. Compare to specifications.
Lubrication holes
Journal
Camshaft Oil Clearance:
Std: .0022-.0035I (.055-.090 mm)
Limit: .0039I (.10 mm)
NOTE: Replace camshaft if damaged or if any part
is worn past the service limit.
NOTE: Replace cylinder head if camshaft journal
bore is damaged or worn excessively.
CYLINDER HEAD EXPLODED
VIEW, EH50PL
1. Remove the two 6mm flange bolts (A) from
cylinder head. See next exploded view on next
page.
2. Loosen each of the four cylinder head bolts
evenly 1/8 turn each time in a criss-cross pattern
until loose.
3. Remove bolts (B) and tap cylinder head lightly
with a plastic hammer until loose. CAUTION:
Tap only in reinforced areas or on thick parts of
cylinder head casting to avoid damaging the
thread.
4. Remove cylinder head and head gasket.
ENGINE
B
3.19