1028H60 PISTON, PIN SET - REPLACE - Alfa - 156 - eLearn

3239080 - 1028H60 piston, pin set - replace

Fit the piston rings on the pistons using a suitable tool.

Fit the piston rings on the piston so that the word TOP stamped on them is turned toward the piston crown.

From September 2003, piston rings with a modified profile will be used. The piston ring for the 1st groove and the piston ring for the 2nd groove are the same thickness (1.19 mm); follow the diagram shown below to fit them correctly.

Dismantling ( Reassembling

) 1. Remove the circlips.2. Remove the pin (2a) and separate the connecting rod (2b) from the pistons (2c).

1. Remove the piston rings (1a) from the pistons using a suitable tool (1b).

Reassembling ( Dismantling

) Check the alignment of the connecting rods using a suitable tool; if the connecting rod is not perfectly aligned, replace it.Check that the difference in weight between the pistons is within the recommended values.

The arrows in the diagram show the areas from where material can be removed in order to equalize the weight.

	Measurement		Value
-	Piston weight difference (g.)		+- 5

Check that the difference in weight between the connecting rods, complete with bearing shells, caps and bolts, is within the recommended values.

The arrows in the diagram show the areas from where material can be removed in order to equalize the weight.

	Measurement		Value
-	Connecting rod weight difference (g.)		± 2.5

Fit the piston rings on the pistons using a suitable tool.1. Join the connecting rods to the pistons so that the number stamped on the big end (1a) is facing the reference (1b) on the piston skirt where the oil jet is housed. Fit the pins and secure them using the circlips.