Mitsubishi 6M70 - Inspection and Adjustment of Valve Clearances

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2. Mitsubishi 6M70 Inspection and Adjustment of
Valve Clearances Service standards (Unit
:
mm)
Tightening torque (Unit: N·m {kgf·m})
• Mitsubishi 6M70 Valve c
learances should be checked and
adjusted as follows while the engine is still cold.
[Inspection]
• Remove the rocker cover.
• Bring the No. 1 or No. 6 cylinder piston to the top dead center
(TDC) on the compression stroke according to the following pro-
cedure:
• Crank the engine until the pointer is aligned with the “1 6”
mark on the flywheel.
• This will place either the No. 1 or No. 6 cylinder piston at TDC
on the compression stroke. The cylinder in which the rocker
arms for both the intake and exhaust valves can be pushed
down by hand by the valve clearance amounts has its piston
at TDC. Rotate the engine by one full turn to switch the TDCs
of the No. 1 and No. 6 cylinder piston
s.
• With
the No. 1 or No. 6 cylinder piston at TDC, measure the
clearance of the valves (clearance between valve bridge and
pad) marked with a circle in the table below.
• Any attempt to insert a feeler gauge without first securing suffi-
cient space, as described above, between the pad and the valve
bridge will fail, as the pad will tilt as shown in the illustration, thus
blocking the entry of a feeler gauge.
Location Maintenance item Standard value Limit Remedy
–
Mitsubishi 6M70
Valve clearance (
when engine is cold)
Intake side 0.4 – Adjust
Exhaust side 0.6 – Adjust
Mark Parts to be tightened Tightening torque Remarks
–
Loc
k nut ( 6M70 valve bridge adjusting screw tightening) 68 {7} –
–
Lock nut ( 6M
70 rocker arm adjusting screw tightening) 60 {6} –
Cylinder No. 123456
Valve INEXINEXINEXINEXINEXINEX
No. 1 cylinder
piston at TDC on
compression stroke
OOO––OO– –O– –
No. 6 cylinder
piston at TDC on
compression stroke
–––OO––OO–OO
5
10
1
6
ON-VEHICLE INSPECTION AND ADJUSTMENT