2001 Bombardier DS 650 Shop Manual 704 100 011, Page 65Get this manual
Subsection 05
Section 03 ENGINE (CYLINDER AND HEAD)
4, CYLINDER HEAD
Removal
Remove engine from vehicleRefer to INSTALLATION AND REMOVALRemove starterRefer to STARTING SYSTEMRemove camshaftsWithdraw the front chain rail no11Unfasten nuts no21 on stud bolts and collar screws no22Unfasten socket screws no23 linking cylinder head to cylinderRemove cylinder head
Inspection
Check valve spring for rust or corrosion and free lengthVALVE SPRING FREE LENGTH SERVICE LIMIT 44.5 mm (1-34 in)
Installation
For installation, reverse the removal procedure
Removal
Remove valve spring no5Push the valve stem then pull valve out of valve guide