Inspecting Piston Cooling Nozzle - Mitsubishi S3Q2 Service Manual

INSPECTION AND REPAIR OF BASIC ENGINE

4.18 Inspecting piston cooling nozzle

Insert the round bar (ø4 mm [0.1575 in.] or less) to the top
of the piston cooling nozzle installed on the crankcase.
Round rod
Inspect that the steal ball operates smoothly. If it does not
operated smoothly, replace the piston cooling nozzle with
new one.
Inspecting piston cooling nozzle
6-22