Technical data

Remove the connecting rod big end bolt nuts (bolts on the W33), then remove the bearing cap.
Push tie piston and connecting rod assembly upward out of the cylinder block. (Mark each piston with its
respective cylinder prior to its removal.) Arrange the removed parts by each cylinder. When pushing out
the piston and connecting rod assembly, use a wooden block on the mating surface of cap so as not to
impair the metal.
When disassembling the piston and connecting rod
assembly, use the following procedure. Keep the
disassembled parts by each set. Be careful to prevent
confusion, especially for each set of the piston and pin.
W13, W21 and W27: Set the piston and connecting
rod assembly on the special tool (Piston Pin Setting Tool)
body. Insert the push rod of tool into the piston pin hole
and then press the pin out.
CAUTION: DO NOT ATTEMPT TO
REMOVE A PISTON PIN BY STRIKING IT
WITH A HAMMER. A STUCK PISTON PIN
WHICH REQUIRES EXCESSIVE PULLING FORCE SHOULD BE REPLACED.
CAUTION: DO NOT PLACE A LOAD OF MORE THAN 3,000kg ON THE PISTON
SETTING TOOL.
Remove the main bearing caps. Arrange the removed caps and bearings by each cylinder. Before
removing the cap, measure the crankshaft end play. (See paragraph 4 in INSPECTION below.)
Remove the crankshaft.
INSPECTION
1. Cylinder block
Check the cylinder block for cracks and damage.
Replace if defective. Check the camshaft
front journal bushing for wear and damage.
If defective, replace using a special tool.