Service procedures - engine Group 21
44
Pistons, piston rings and
connecting rods, assembling
Special tools: 999 1801, 999 2529, 998 3590, 885126
1
Fit one of the circlips to the piston.
2
Oil the gudgeon pin and the connecting rod bushings.
3
Heat the piston to about 100°C (212°F). Fit the piston and
connecting rod with the arrow on the piston and the word
Front on the connecting rod pointing in the same direction.
Push the gudgeon pin in with drift 999 1801 and handle 999
1801.
Note: The gudgeon pin should enter easily, it must not be
knocked in.
4
Fit the other circlip.
5
Check that the connecting rod moves smoothly in the gudg-
eon pin journalling.
6
Fit the piston rings to the piston using piston ring pliers.
Make sure that the markings on the piston ring face up-
wards, and that the ring gaps are aligned. Fit the oil scraper
ring first, it can be turned either way. The opening in the
spring of the oil scraper ring should sit opposite the oil ring’s
opening.
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