2-CYLINDER HEAD ASSEMBLY
8
CHK
ADJ
NO. PART NO. PART NAME QTY CAUTION
1 1250101-076093 GB16674 M8×45 (environmental protection color zinc) 4 25±3N.m
2 1051656-001000 ZT158MJ cylinder head cover gasket 1
3 1251401-001000 φ8×14 hollow positioning pin 2
4 1251300-056093 M6 cap type 9 grade nut (color zinc) 4 10±1.5N.m
5 4050956-002000 ZT158MJ valve cover 2
6 1051468-009000 37×1.9 Acrylic O-ring 2
7 1251100-067093 M6×10 top pin bolt (color zinc) 1 10±1.5N.m
8 1251513-001019 6.3×12×1.6 copper gasket 3
9 1051754-002000 1.2×6×7 oil pin 1
10 4050756-002000 ZT158MJ cylinder head cover 1
11 4050656-004000 ZT158MJ cylinder head 1
Fig.4 CYLINDER HEAD
ASSEMBLY Cylinder head cover assembly
PROCEDURE:
●Use the 12#T rod sleeve to remove the four bolts (1) to remove the cylinder head cover, cylinder head cover
gasket (2) and positioning pin (3).
●Clean up the remaining sealant on the joint surface, and be careful not to drop foreign matter into the engine.
●Use a 10#T rod sleeve to disassemble the cover nut ⑷, and remove the valve chamber cover ⑸and the
sealing ring ⑹.
●Use 8#T rod sleeve to remove two bolts ⑺, and remove two washers ⑻.
CAUTION:
●The cylinder head cover gasket ⑵ is a one-time use, and must be replaced after disassembly, otherwise it
will cause a series of problems such as improper sealing and oil leakage.
●When cleaning residual sealant and other impurities, avoid foreign matter from entering the engine.
●The oil passing pin ⑼ is one of the passages of the oil circuit, which cannot be blocked, and there is an
interference fit with the cylinder head cover ⑽.Removing the oil pin may cause damage tothe joint surface.
●Both bolts ⑺ can be screwed out when the engine is running to check if there is oil leakage, as one of the
ways to check whether the oil is on the cylinder.
●Subsequent production will switch the oil passing pin ⑼on the cylinder head cover ⑽to the cylinder head
⑾.
