7. CYLINDER HEAD/VALVES MXU 300/250
Install the camshaft dowel pins and holder.
Install the washers and nuts and tighten the
nuts.
· Apply engine oil to the threads of the
cylinder head nuts.
· Diagonally tighten the cylinder head
nuts in 23 times.
Torque:
Cam shaft hold nut (Apply engine oil to
threads): 2.5 kgf-m (25 Nm, 18 lbf-ft)
2. Turn the cam chain tensioner screw
counter-clockwise to release it.
Apply engine oil to a new O-ring and
install it.
Tighten the cam chain tensioner cap bolt.
Be sure to install the O-ring into the
groove properly.
3. Adjust the valve clearance. (Refer to the
"VALVE CLEARANCE" section in the
chapter 3)
7-9
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