Weichai America Corp.
24
2.9.2
Steps to disassemble cylinder head
1)
Loosen the cylinder head bolts and remove them.
2)
Pull the cylinder head up vertically to take it down.
If the cylinder head gasket is attached on the
removed cylinder head, remove it and place it back on engine block.
Put the removed cylinder head
on cardboard to prevent damage to the upper surface of the combustion chamber and other sealing
surfaces. If more than one cylinder head needs to be disassembled, mark the cylinder number on the
head for reference.
3)
Remove the cylinder head gasket. If more than one cylinder head gasket needs to be disassembled,
mark the cylinder number on the gaskets for reference.
4)
Remove the intake and exhaust valve module. Refer to disassembly of valve mechanism (9.6) for
details
5)
Remove the valve seal. Valve seals can’t be reused.
2.9.3
Steps to assemble cylinder head
1)
Insert the seal valve into the valve guide pipe.
2)
Install the intake valve and exhaust valve onto the cylinder head.
3)
Install new cylinder head gaskets. Cylinder head gaskets cannot be reused.
4)
Assemble the cylinder head to the engine block.
5)
Thread the cylinder head bolts into the cylinder head.
6)
Tighten the cylinder head bolts (See Key Point 1 in 9.5.4).
2.9.4
Cylinder head inspection and repair
Key point 1:
Assembling
1)
Refer to Figure 9-5 for the bolt pre-tightening and tightening order for each individual cylinder
head. The cylinder heads should be tightened in the order 3-2-4-1.
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