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6-16 ENGINE TOP END
Camshaft, Camshaft Chain
•
Remove the spark plugs.
•
Using the shaft wrench [A], turn the crankshaft counter-
clockwise [B] and set the crankshaft at #1, 4 piston TDC
(see Piston TDC Finding).
Special Tool - Shaft Wrench: 57001-1551
•
Pull the tension side (exhaust side) of the chain taut to
install the chain.
•
Engage the camshaft chain with the camshaft sprockets
so that the timing marks on the sprockets are positioned
as shown.
○
The timing marks must be aligned with the cylinder head
upper surface [A].
EX mark [B]
#1 Pin [C]
#2 Pin [D]
IN mark [E]
#31 Pin [F]
•
Install the camshaft cap [A] and upper camshaft chain
guide [B]. While pushing the camshaft chain, tighten all
camshaft bolts and chain guide bolts.
○
Install the longer (white) bolts to the #10 and #14 position
shown by triangle marks.
○
First tighten the all camshaft cap and chain guide bolts
evenly to seat the camshaft in place, then tighten all bolts
following the specified tightening sequence.
Torque - Camshaft Cap Bolts: 12 N·m (1.2 kgf·m, 104 in·lb)
Upper Camshaft Chain Guide Bolts: 1 2 N·m (1.2
kgf·m, 104 in·lb)
•
Tighten the camshaft chain tensioner (see Camshaft
Chain Tensioner installation).
○
Turn the crankshaft counterclockwise two turns.
•
Install the cylinder head cover (see Cylinder Head Cover
installation).
Piston TDC Finding
This job can be done when the engine is on the hull and
during camshaft installation.
•
Prepare a suitable wire for pointer.
•
Using the coupler cover bolt [A], hold the wire pointer [B].