Mitsubishi — [212°F to 248°F]

For these Mitsubishi models: S6R S6R2, S6R- S6R2.

Applies to: Mitsubishi S6R S6R2

Procedure

1. Do not service air cleaner while engine is running.
2. When removing air cleaner element for servicing, prevent dust from entering air passage to cylinders.
3. In case of air cleaner equipped with a dust indicator, service element only when the indicator shows red. Frequent servicing can cause element damage. 38 MAINTENANCE SECTION [BASIC BLOCK] ( Valve Clearance Check and adjust the valve clearance when the engine is cold. Confirm top dead center on compression stroke
4. Turn the engine in normal direction to align the timing mark [1.6] on the damper with the pointer as shown.
5. Remove the rocker cover of a cylinder on which the valve clearance is to be checked and adjusted, and make sure the inlet and exhaust valves have some clearance. (Example) If the timing mark [1.6] is aligned with the pointer, either No. 1 or No. 6 piston is at top dead center on compression stroke. Adjust the heighi of valves (/A\ CAUTION }#——— Make sure the clearance between the valve bridge and valve rotator is more than 1.5 mm [0.059 in.]; if not, interference will occur between the bridge and rotator to cause the valve cotters to get out place. If the clearance is less than 1.5 mm [0.059 in.] after the height of valves has been adjusted, consult your Mitsubishi dealer. Before inspecting the valve clearance, adjust the height of two valves (bring the bridge into contact with the valves) by means of the valve bridge adjusting screw so that there is no difference in height between the two vaives. If the valve seats are worn. one valve differs from another in height, producing some clearance between the valve stem and bridge, resulting in change in valve clearance.
6. Loosen the lock nut of the valve bridge adjusting screw and back the screw off.
7. Hold the rocker arm by finger in such a manner as to push down on the bridge and turn in the adjusting screw slowly.
8. While observing the adjusting screw through inspection hole, turn in the screw until it touches the valve stem. From that position, turn in the screw approximately, 10°more and tighten the lock nut. \ Lock arm Adjusting screw Lock nut Valve bridge Vaive stem Clearance between bridge and value rotator 1.5 mm or more Observation 39 MAINTENANCE SECTION [BASIC B LOCK] - continued r inspect
9. Check the valve clearance with a feeler gauge inserted between the rocker arm and bridge cap. Valve Inlet valve 0.6 mm [0.024 in.] clearance
10. Remove the rocker cover of a cylinder on which the valve clearance is to be checked and adjusted, and make sure the inlet and exhaust valves have some clearance. Notice: Facing the cylinder head, the inlet valve is on the left side and the exhaust vaive is on the right side. Adjust

Source: manual:Mitsubishi S6R Manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.