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- After measuring the valve guide diameter and the
valve stem diameter, check the clearance be-
tween guide and stem.
INTAKE
Specification
Desc./Quantity
Standard clearance:
0.10 mm
Limit allowed:
0.08 mm
EXHAUST
Specification
Desc./Quantity
Standard clearance:
0.15 mm
Limit allowed:
0.1 mm
- Check that there are no signs of wear on the faying surface with the set screw articulated terminal.
- If no faults are found during the above checks, the same valves can be reused. For better sealing
results, we recommend grinding the valve seats. Grind the valves gently with fine-grained lapping com-
pound. Upon grinding, keep the cylinder head in horizontal position. This will prevent the lapping
compound residues from penetrating between the valve stem and the guide (see figure).
CAUTION
TO AVOID SCORING THE FAYING SURFACE, DO NOT ROTATE THE VALVE WHEN NO LAPPING
COMPOUND IS LEFT. CAREFULLY WASH THE CYLINDER HEAD AND THE VALVES WITH A
SUITABLE PRODUCT FOR THE TYPE OF LAPPING COMPOUND BEING USED.
CAUTION
DO NOT CHANGE THE VALVE FITTING POSITION (RH - LH).
- Check the camshaft bearings for signs of abnormal wear or scores.
- Using a micrometer, measure the camshaft bearings.
Vespa Primavera125 - 150 i.e. 3Valvole (2013)
Characteristics
CHAR - 23
Содержание 150
Страница 1: ...SERVICE STATION MANUAL 1Q000118 EN Vespa Primavera125 150 i e 3Valvole 2013 ...
Страница 4: ......
Страница 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Страница 27: ...INDEX OF TOPICS TOOLING TOOL ...
Страница 37: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Страница 51: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Страница 55: ...Vespa Primavera125 150 i e 3Valvole 2013 Troubleshooting TROUBL 55 ...
Страница 56: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Страница 117: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Страница 123: ...INDEX OF TOPICS ENGINE ENG ...
Страница 182: ...INDEX OF TOPICS INJECTION INJEC ...
Страница 203: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Страница 222: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Страница 229: ...INDEX OF TOPICS CHASSIS CHAS ...
Страница 244: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Страница 249: ...Transmission 10 53 124 136 Turn indicators 79 Tyres 11 V Vehicle 8 118 119 ...