PIAGGIO PORTER 1.3 16V 2008, Service Manual

Page: 261 / 892

2. Fit a new spark plug sealing ring with the special
tool recommended.
N.B.
- MAKE SURE THAT THE SEALING RING IS ADEQUATELY
POSITIONED.
- USE A SUITABLE WOODEN PIECE TO AVOID DAMAGING
THE CYLINDER HEAD COVER.
- BE CAREFUL NOT TO DAMAGE THE SEALING RING
PROTRUDING PART.
Specific tooling
020274Y Checking tool kit
Valve - tappet play
Valve clearance adjustment
Measure and adjust valve clearance when the pis-
ton of cylinders No.1 and No.4 is at the top dead
centre at the end of compression.
AS A RULE, VALVE CLEARANCE IS ADJUSTED WHEN
THE ENGINE IS HOT . "HOT ENGINE" MEANS THAT THE
COOLING WATER TEMPERATURE IS 75 ÷ 85°C AND THAT
THE ENGINE OIL TEMPERATURE IS ABOVE 65°C. NEV-
ERTHELESS, ONCE THE ENGINE IS SERVICED, ADJUST
VALVE CLEARANCES WITH COLD ENGINE AND THEN
ADJUST AGAIN WITH HOT ENGINE AFTER WARMING UP
THE ENGINE.
Locking torques (N*m)
Lock nut
16.7 ÷ 22.5 Nm
VALVE CLEARANCES
Specification Desc./Quantity
Intake with hot engine 0.25 ± 0.05 mm
Exhaust hot engine 0.33 ± 0.05 mm
Intake with cold engine 0.18 mm
Exhaust with cold engine 0.25 mm
Exhaust with cold engine 0.25 mm
Exhaust with cold engine 0.25 mm
•
With rocking levers for valve of cylinder No.1 free (intake),
adjust the cylinder valves: 1-2
•
The piston of cylinder No.1 is at the top dead centre during compression (exhaust),
adjust the cylinder valves: 1-3
•
With rocking levers for valve of cylinder No.4 free (intake),
adjust the cylinder valves: 3-4
•
The piston of cylinder No.4 is at the top dead centre during compression (exhaust),
Adjust the cylinder valves: 2-4
PORTER 1.3 16V
Engine
EN - 261