- If the sealing surface of the valve is found to be
interrupted at one or more points or is not flat, re-
place the valve.
- Insert the valves into the cylinder head.
- Alternatively check the intake and exhaust
valves.
- The test is carried out by filling the manifold with
petrol and checking that the head does not ooze
through the valves when these are just pressed
with the fingers.
Inspecting the valve housings
- Clean the valve seats of any carbon residues.
- Using the Prussian blue, check the width of the
impression on the valve seat "
V
".
Characteristic
Standard value:
1 - 1.3 mm
Admissible limit:
1.6 mm
- If the impression width on the valve seat is larger than the prescribed limits, true the seats with a 45°
mill and then grind.
- In case of excessive wear or damages, replace the head.
Inspecting the valves
- Measure the diameter of the valve stems in the three positions indicated in the diagram.
STANDARD DIAMETER
Specification
Desc./Quantity
Inlet:
4.987 - 4.972 mm
Outlet:
4.975 - 4.960 mm
Fuoco 500 i.e.
Engine
ENG - 63
Summary of Contents for Fuoco 500
Page 1: ...SERVICE STATION MANUAL XXXX Fuoco 500 i e ...
Page 4: ......
Page 6: ......
Page 7: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 22: ...Characteristics Fuoco 500 i e CHAR 16 ...
Page 23: ...INDEX OF TOPICS TOOLING TOOL ...
Page 34: ...Tooling Fuoco 500 i e TOOL 12 ...
Page 35: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 50: ...Maintenance Fuoco 500 i e MAIN 16 ...
Page 51: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Page 55: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 87: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 92: ...Engine from vehicle Fuoco 500 i e ENG VE 6 ...
Page 93: ...INDEX OF TOPICS ENGINE ENG ...
Page 196: ...Engine Fuoco 500 i e ENG 104 ...
Page 197: ...INDEX OF TOPICS INJECTION INJEC ...
Page 246: ...Injection Fuoco 500 i e INJEC 50 ...
Page 247: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 301: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 315: ...INDEX OF TOPICS COOLING SYSTEM COOL SYS ...
Page 322: ...Cooling system Fuoco 500 i e COOL SYS 8 ...
Page 323: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 341: ...Fuoco 500 i e Chassis CHAS 19 ...
Page 342: ...Chassis Fuoco 500 i e CHAS 20 ...
Page 343: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Page 348: ...Pre delivery Fuoco 500 i e PRE DE 6 ...
Page 349: ...INDEX OF TOPICS TIME TIME ...
Page 378: ...Seat SADDLE Code Action Duration 1 004003 Saddle Replacement Time Fuoco 500 i e TIME 30 ...
Page 396: ...Time Fuoco 500 i e TIME 48 ...