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  3. mxu 550 exi Werkstatthandbuch
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mxu 550 exi Werkstatthandbuch : Seite 200

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          8. CYLINDER HEAD/VALVES                                       MXU 550EXi /MXU500i


 Measure compressed force (valve spring) and
 installed length.
 Replace if out of specification.

 Standard:
    Inner: 3.5 kg (at 28.7 mm)
    Outer: 13 kg (at 31.43 mm)




 Measure the spring tilt.
 Replace if out of specification.

 Standard:
         Inner: 1.2 mm
         Outer: 1.2 mm




 ASSEMBLY                                        Valve Spring Compressor

 Install the valve spring seats and oil seal.

 Be sure to install new oil seal.

 Lubricate each valve with engine oil and
 insert the valves into the valve guides.
 Install the valve springs and retainers.
 Compress the valve springs using the valve
 spring compressor, then install the valve
 cotters.

 · When       assembling, a valve spring
     compressor must be used.
   · Install the cotters with the pointed ends
     facing down from the upper side of the
     cylinder head.

 Special tool:
   Valve Spring Compressor          A120E00040

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