Cleaning of crankshaft lubrication ducts

Check that the taper and the ovalization of the liners falls within the prescribed values.

• Calculate the clearance between the liners and the pistons and check that it falls within prescribed limits.

Cleaning of crankshaft lubrication ducts

1. Punch a hole in the crankshaft lubrication duct plugs, then extract them and remove any shavings created by the calking operation.

• Thoroughly clean the lubrication ducts using a suitable detergent, then dry with a jet of compressed air.

1. Apply the prescribed sealant on the new plugs and insert them, using a suitable tool, into the holes of the lubrication duct.

1. Calk the plugs using a suitable tool.

Measure the assembly clearance between the main journals and relative bearings halves using a gauged wire (plastigage)

NOTE: Check each journal without removing the crankshaft during the checking operation. The bearing halves must be housed in their respective seatings.

1. Rest a piece of calibrated wire across the whole width of the main journal being checked, paying particular attention that it does not correspond with the lubrication hole.