Checking The Alignment Of The Piston Pins In The Pistons
The piston pin must not be loose. It should be possible to push it through the hole using thumb pressure.
Replace the piston if the play is too great.
Checking The Alignment Of The Piston Pins In The Connecting Rods
The piston pin should slide through the hole with light thumb pressure.
If the play is too great measure the piston pin.
Use a micrometer.
For the correct diameter of the piston pin, see Pistons .
Scheme 406
Visually check the bearing shells.
If in doubt measure out-of-round.
Use a bore gauge.
For the correct diameter of the bearing recess, see Crank mechanism .
The piston pin must not be loose. It should be possible to push it through the hole using thumb pressure.
Replace the piston if the play is too great.
The piston pin should slide through the hole with light thumb pressure.
If the play is too great measure the piston pin.
Use a micrometer.
For the correct diameter of the piston pin, see Pistons .