KTM 690 LC4 2007, Repair Manual

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6-11
– Mount the piston bolt lock ring: attach the lock ring (see photo
showing the disassembled condition), insert special tool
750.29.035.000 in the piston bolt and press against the piston.
Turn the special tool in a counterclockwise direction, causing the
lock ring to be pressed into the groove.
NOTE: make sure the lock ring is correctly positioned in the groove.
– Slide the cylinder onto the engine case, apply Loctite 243 to the
screw
1
(M6x25) and tighten to 10 Nm.
– Mount a new cylinder head gasket
2
and mount any dowel pins
previously removed.
NOTE: make sure the locating tabs
3
on the timing chain guide
engage in the recess in the chain tunnel.
– Mount the cylinder head and the oiled new cylinder head screws.
NOTE: always replace the cylinder head screws.
– Tighten the cylinder head screws (A/F 14 mm or AH 8 mm) in 4
stages in a crosswise direction, starting with the left screw on the
intake side (tightening order
A
,
B
,
C
,
D
)
1st stage: 15 Nm, 2nd stage 30 Nm, 3rd stage: 45 Nm, 4th stage 60 Nm
– Apply Loctite 243 to both screws
4
(M6x30) and tighten to 10 Nm.
Moving the engine to TDC
– Move the crankshaft until the piston is in the top dead center
position.
– Tighten the engine locking screw 0113 080802
5
and make sure
the engine is locked.
2
3
1
A
B
C
D
4
4
5