dinkstreet 300 i abs 1 Manuale-dofficina : Pagina 75

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          6. CYLINDER HEAD/VALVES                                             Downtown 300i ABS


 VALVE STEM INSPECTION
 Inspect each valve for bending, burning, or
 abnormal stem wear.




                                                   Intake valve       Exhaust valve



                                                                  Valves
 Remove      carbon    deposits from the
 combustion chamber.
 Clean off any gasket remnants from the
 cylinder head contact surface.


   Be     careful not to damage the cylinder
       head mating surface.




 CYLINDER HEAD ASSEMBLY
 Install the valve spring seats and stem seals.
 Lubricate each valve stem with engine oil and
 insert the valves into the valve guides.
 Be sure to install new valve stem seals.
 Install the valve spring.

 Special

 Valve spring compressor E040

  · Tap      the valve stems gently with a
       plastic hammer for 23 times to firmly
       seat the cotters.
     · Be careful not to damage the valves.
                                                  Valve spring compressor




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