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Engine guides and mods

Cylinder Head Bolts

It is important when refitting the cylinder head to get the bolts right

Modification Details




 Cylinder Head Bolt Layout


Bolts 1 To 8


Important: You should always use new bolts.

700cc Petrol Engine Bolts 1 to 8


1st Stage  21Nm
2nd Stage  90 Degrees
3rd Stage  90 Degrees
4th Stage  10 Degrees

600cc Petrol Engine Bolts 1 to 8

1st Stage  21Nm
2nd Stage  90 Degrees
3rd Stage  90 Degrees
4th Stage  10 Degrees

800cc 450 Diesel Engine Bolts 1 to 8

1st Stage  30Nm
2nd Stage  90 Degrees
3rd Stage  90 Degrees
4th Stage  90 Degrees
5th Stage  10 Degrees

800cc 451 Diesel Engine Bolts 1 to 8

1st Stage  30Nm
2nd Stage  90 Degrees
3rd Stage  90 Degrees
4th Stage  90 Degrees
5th Stage  10 Degrees
 
999cc 451 Petrol Engine Bolts 1 to 8

1st Stage  25Nm
2nd Stage  90 Degrees
3rd Stage  90 Degrees

Complete all the stages on bolts 1 to 8 before tightening 9 and 10 to the following figures.

Bolts 9 And 10

27Nm


Thanks to Tolsen and Chris for the info. Smart, can you please stop changing these values!

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