Cylinder Head - SeaDoo Rotax 1503 4-Tec 2005 Engine Shop Manual

Section 01 ENGINES (1503 4-TEC)
Subsection 06 (CYLINDER HEAD)

CYLINDER HEAD

Removal
Lock crankshaft with crankshaft locking tool
(P/N 529 035 821), refer to CYLINDER BLOCK
section.
Drain coolant (refer to appropriate VEHICLE SHOP
MANUAL).
Disconnect coolant temperature and camshaft po-
sition sensors (CTS and CAPS).
Remove:
– exhaust manifold (refer to EXHAUST MANI-
FOLD elsewhere in this section)
– engine hoses
TYPICAL
1. Coolant hose
2. TOPS ventilation hose
– chain tensioner (refer to CYLINDER BLOCK
section)
– valve cover shield (see VALVE COVER RE-
MOVAL above)
– camshaft timing gear
– cylinder head screws M6 no. 16
78
1. Cylinder head screws M6
– cylinder head screws M11 no. 17 retaining
cylinder head to cylinder block.
1. Cylinder head screws M11
Pull up cylinder head no. 18.
Remove gasket no. 19.
Cleaning
Remove carbon deposits from combustion cham-
ber, exhaust port and piston top.
Inspection
Check for cracks between valve seats, if so, re-
place cylinder head.
Check mating surface between cylinder and cylin-
der head for contamination. If so, clean both sur-
faces.
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