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6 - Motor Release 01 Date 09/2007
Fitting the piston and the cylinder
– Fit a new cylinder base gasket.
– Oil the piston pin bearing in the connecting rod and the piston
pin itself.
– Fit the piston and fasten the piston pin with two new retaining
rings.
NOTE: THE ARROW ON THE PISTON TOP MUST POINT IN
THE DIRECTION OF TRAVEL.
- Oil the piston and fit the piston rings.
The scraper ring gap should face the back of the vehicle.
The compression ring gap should form an angle of 90° with the
scraper ring gap.
– Pull up the timing chain through the chain tunnel.
– Push the cylinder onto the piston and remove the mounting
ring.
WHEN FITTING THE CYLINDER, TAKE CARE NOT TO
BREAK THE OIL SCRAPER RING!
Fitting the cylinder head
– Check that the two centring bushes are properly seated in the
cylinder.
– Fit a new cylinder gasket (with the inscription “ALTO” facing
upwards) and fit the cylinder head and the timing chain.
– Oil the threads and the contact surfaces of the four flange
screws and fit them along with the related washers.
– Tighten the flange screws in three steps following a crosswise
pattern:
1st step – tighten until a slight resistance is felt.
2nd step – tighten to 40 N·m.
3rd step – tighten to 50 N·m.
– Fit and tighten the three screws 1 (M6x45) and 2 (M6x40) to
10 N·m.
Screw 2 must be fitted laterally on the timing chain guard
with a new copper retaining ring (6x10x1).
2
1
1
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