Piston - Remove; Removing The Piston With Chain Block Lifting - Mitsubishi S12A2 Service Manual

4.5 Piston - Remove

When holding the connecting rod with your hand to prevent it from swinging, be very careful, as you may suffer
hand injuries from accidental movement of the connecting rod.
(a) When pulling-out the piston, be careful not to drop the upper connecting rod bearing.
(b) When removing piston, be careful not to damage cylinder liner by connecting rod runout.
(c) When only a few pistons remain in the cylinders, the crankshaft tends to turn by weight imbalance. Be sure to
hold the crankshaft to prevent it from rotating while removing pistons.
(d) Make sure that the connecting rod does not interfere with the piston cooling nozzle when removing the piston.
(e) When pulling the piston out of the cylinder liner, hold the piston by hand so that the piston does not rock.If piston
swings, it can result in piston inner surface hitting the connecting rod, causing damage to the piston.

4.5.1 Removing the Piston With Chain Block Lifting

(1) Remove the connecting rod cap and rotate the crank-
shaft to bring the piston to the top dead center position.
(2) Install the eye bolt to the threaded hole on the piston
top, and support the piston to prevent it from falling
down.
(3) Rotate the crankshaft to place the crank pin slightly
near to the inspection window so that the connecting
rod big end does not contact the cylinder liner.
(4) Carefully pull-out the piston by making sure that the
connecting rod big end slides into the cylinder liner.
Chapter 5 DISASSEMBLY OF BASIC ENGINE
Eyebolt
P/N:45815-32301
(M10 × 1.5 mm)
Crankpin
Removing the Piston With Chain Block Lifting (1)
Crankpin
Removing the Piston With Chain Block Lifting (2)
Weight of piston and
connecting rod assembly:
approx 19.8 kg [43.7 lb]
Eyebolt
P/N:45815-32201
(M8 × 1.25 mm)
Weight of piston and
connecting rod assembly:
approx 19.8 kg [43.7 lb]
5-19