Author Topic: Mark 3 valve train  (Read 3974 times)

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Offline trevorp

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Mark 3 valve train
« on: 18 Aug 2008 at 08:35 »
Does anyone know if the cups at the head end that support the valve springs is used for support or shimming or both and are they really necessary
I have a friend that is putting his together and doesn't have them they are listed in the parts manual and not used on mk1

Offline eddie

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Re: Mark 3 valve train
« Reply #1 on: 18 Aug 2008 at 11:40 »
Trevor,
            The cups centralise the static end of the spring as well as providing the correct installed length for the springs. If they are left out, the spring poundage will be reduced with the risk of premature valve bounce. Also, if the springs are not centralised, the coils of the inner and outer springs can clash and cause early spring failure.
                                           Regards,
                                                       Eddie.

Offline trevorp

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Re: Mark 3 valve train
« Reply #2 on: 25 Aug 2008 at 04:00 »
Thanks eddie

 

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