Valve Clearance Check And Adjustment - Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement

ENGINE <4G1> –
Intake valve side
No. 1 No. 2 No. 3 No. 4
Exhaust valve side
On-vehicle Service

VALVE CLEARANCE CHECK AND ADJUSTMENT

1. Start the engine and allow it to warm up until the engine
coolant temperature reaches 80 to 95 C.
2. Remove all spark plugs from the cylinder head for easy
inspection.
3. Remove the rocker cover.
4. Turn the crankshaft clockwise until the notch on the pulley
is lined up with the "T" mark on the timing indicator.
5. Move the rocker arms on the No. 1 and No. 4 cylinders
up and down by hand to determine which cylinder has
its piston at the top dead centre on the compression stroke.
If both intake and exhaust valve rocker arms have a valve
lash, the piston in the cylinder corresponding to these
rocker arms is at the top dead centre on the compression
stroke.
6. Valve clearance inspection and adjustment can be
performed on rocker arms indicated by white arrow mark
when the No. 1 cylinder piston is at the top dead centre
on the compression stroke, and on rocker arms indicated
by black arrow mark when the No. 4 cylinder piston is
at the top dead centre on the compression stroke.
7. Measure the valve clearance.
If the valve clearance is not as specified, loosen the rocker
arm lock nut and adjust the clearance using a thickness
gauge while turning the adjusting screw.
Standard value (hot engine):
Intake valve: 0.25 mm
Exhaust valve: 0.30 mm
8. While holding the adjusting screw with a screwdriver to
prevent it from turning, tighten the lock nut to the specified
torque.
Tightening torque: 9 Nm
9. Turn the crankshaft through 360 to line up the notch on the
crankshaft pulley with the "T" mark on the timing indicator.
10. Repeat steps (7) and (8) on other valves for clearance
adjustment.
11. Install the rocker cover.
12. Install the spark plugs and tighten to the specified torque.
Tightening torque: 25 Nm
11B-9
11100150154