Cylinder Head Assembly: Service Precautions

CAUTION:
Interference Type Engine
This is NOT a free-wheeling engine, if it has jumped time, there will be damage to the valves and pistons (6108) and will require the removal of the cylinder heads.
Valve/Piston Damage
The camshaft sprockets (6256) should only be disassembled from the camshafts when one of the components is to be replaced. At no time, when the timing chain(s) are removed and the cylinder heads (6049) are installed, may the crankshaft (6303) and camshafts (6250) be rotated. Failure to follow these directions will result in valve and/or piston damage.

NOTE:
- Replace the cylinder head (6049) if it is cracked.
- Do not plane or grind more than 0.254 mm (0.010 inch) from original cylinder head gasket surface.
- Remove all burrs or scratches with an oil stone.