Mitsubishi 6M70 - Page 55

11
11-45
M
itsubishi 6M70 Service standards (Unit: mm)
Tightening torque (Unit: N·m {kgf·m})
Lubricant and/or sealant
Location Maintenance item Standard value Limit Remedy
2, 11
6M70 V
alve bridge-to-valve bridge guide clearance 0.01 to 0.048 0.1 Replace
6
6M70 Valve spring
<Intake>,
6M
70 outer valve
spring
<Exhaust>
Free length 89.3 87.9 Replace
Installed load
(Installed length 61.325)
490.4 ± 24.5 N
{50.0 ± 2.5 kgf}
–Replace
Squareness – 2.0 Replace
7
6M70 Inner valve
spring
<Exhaust>
Free length 76.0 74.9 Replace
Installed load
(Installed length 54.325)
98.1 ± 4.9 N
{10.0 ± 0.5 kgf}
–Replace
Squareness – 2.0 Replace
9
6M
70
Exhaust valve
Stem outer diameter 9.925 to 9.940 9.85 Replace
Sinkage from cylinder head
bottom surface
0.2 ± 0.25 0.7 Replace
Valve margin 2.5 2.0 Replace
Seat angle 45° ± 15° – Rectify
9, 12
6M70 E
xhaust valve stem-to-valve guide clearance 0.07 to 0.10 0.2 Replace
10
6M
70
Intake valve
Stem outer diameter 9.96 to 9.975 9.85 Replace
Sinkage from cylinder head bottom
surface
0.5 ± 0.25 1.0 Replace
Valve margin 2.83 2.33 Replace
Seat angle 60° ± 15° – Rectify
10, 13
6M
70 Intake valve stem-to-valve guide clearance 0.035 to 0.065 0.2 Replace
11
6M
70 Outer diameter of valve bridge guide 10.989 to 11 10.988 Replace
14
6M70 Exhaust valve seat width
3.5 ± 0.2 4.2
Rectify or
replace
15
6M70 Intake valve seat width
2.8 ± 0.2 3.5
Rectify or
replace
18
6M70
Cylinder head
Bottom surface distortion 0.07 0.2
Rectify or
replace
Height from top surface to
bottom surface
130 ± 0.05 129.5 Replace
Valve seat hole diameter φ 49 – Replace
Mark Parts to be tightened Tightening torque Remarks
Lock nut (valve bridge adjusting screw tightening) 68 {7.0} –
Stud bolt 20 {2.0} –
Mark Points of application Specified lubricant and/or sealant Quantity
Lip of valve stem seal
Engine oil As required
Stem and end of valve
Nozzle tube end ThreeBond 1211 As required
+0.025
0