Tomberlin CrossFire 150, Service Manual

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CYLINDER HEAD INSTALLATION
• Install new gasket and dowel pins onto cylinder.
• Install cam chain guide.
• Install cylinder head.
• Align the “T” mark on the fl ywheel with the index mark on the engine case by turning the fl ywheel.
• Position the camshaft gear with cam chain so that timing marks on sprocket align with the cylinder head
surface and the large hole is on the top. (The lobes of the camshaft should be pointing downward.)
• Install the dowel pins.
• Install camshaft holder with “EX” pointing towards exhaust.
Note: Apply some oil on the thread part of the camshaft holder bolt.
The camshaft holder nuts should be tightened gradually in 2 ~ 3 times diagonally.
After installing, adjust the valve clearance.
• Torque the cylinder head nuts and bolts.
Bolts: 95 in. / lbs.
Nuts: 16 ft. / lbs.
• Insert small straight screwdriver and turn the cam chain tensioner bolt counter-clockwise and release the lock.
Do NOT tighten.
• Apply oil on the new O-ring.
• Install and tighten the cam chain tensioner cover bolt.
• The O-ring must be mounted properly in the groove.
CAMSHAFT
The camshaft is the main driving unit of the valve train. There is an air inlet cam lobe and an exhaust cam lobe.
The camshaft wear will affect the correct operation of the valve.
CAMSHAFT REMOVAL
• Remove cylinder head cover.
• Remove the cam chain tensioner bolt cap, and remove the O-ring. (See Picture Above)
• Insert small straight screwdriver into hole and turn clockwise until it locks.
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