Technical data

Measure the piston ring gap clearance. Replace the ring if the gap
is too large. To measure, insert the ring into the least worn place of
the cylinder bore (skirt) using a piston as shown, and measure the
gap with a feeler gauge.
When the clearance between the piston pin and piston or
connecting rod small end bushing for the W33 engine is excessive,
replace the piston and pin assembly or the connecting rod.
3. Connecting Rod
Using a connecting rod aligner, check bend and
distortion of the rod.
If excessive.
Measure the connecting rod thrust
clearance with the rod assembled on the
crankshaft. If the clearance is excessive,
replace the rod assembly.