Workshop Manual

REPAIR STANDARDS
207
Engine Body
Cylinder Head
Major Name
Inspection Item
Nominal Assembly
Limit Repair Procedure Comments
Category
of Part Dimension Standard Value
Valve seat depression: B (both inlet and exhaust)
Inlet side 0.73 1.28
(0.029) (0.050)
Valve seat angle: α
Replace insert Inlet side 30°
Exhaust side 45°
Exhaust side 0.70 1.20
(0.028) (0.047)
Inlet side
2.2
1.7
(0.087)
Contact width with valve seat: A
(0.067)
Repair with valve seat After repair, be sure
Exhaust side
2.5
cutter
to lap contact surfaces
2.0
(0.098)
(0.079)
Warpage and flatness of cylinder
0.05 (0.002) 0.2
Maximum Allowable
head lower face (mounting
or less (0.008)
Griding stock 0.3
surface) (0.012) Warpage of manifold mounting 0.05 (0.002) 0.2
repair
surface or less (0.008) Water-pressure test, 3 minutes 5 Leaks require repair or
kgf/cm
2
(psi/kPa) (71.1 – 490) replacement
Cylinder head bolts tightening torque
kgf·m(lb·ft/N·m)
• Apply engine oil to
the cylinder need fixing bolt threads and setting faces.
1st Step 2nd Step
New
3.0 – 5.0 8.2 – 9.2
bolt
(21.7 – 36.1/ (59.4 – 66.5/
29.4 – 49.0) 80.4 – 90.2)
Reused
8.0 – 9.0 10.0 – 11.0
bolt
(57.9 – 65.1/ (72.4 – 79.6/
78.4 – 88.2) 98.1 – 107.9)
(Insert)
A
B
45
()
(Cylinder head)
Bottom surface to cylinder
(Valve)
Same for
inlet & exhaust
Must not protrude from
lower surface of cylinder head