QUESTION
Does Lotus Marques sell tappet shims for the Lotus twin cam engine?
If so, what thicknesses are available?
P.M. - Warriewood, NSW
ANSWER
Lotus Marques stocks a comprehensive range of shims 0.060" through to 0.180"
If you have a standard Lotus twin cam cylinder head with standard cams and standard base-circle, the shim size should be around 0.125"
The thinnest shim size that can be safely fitted into a stock Lotus twin cam engine is 0.070".
Beyond this point the valve spring retainer is about to make mechanical contact with the cam follower where the valve collets will be dislodged.
(installing shims thinner than 0.070" there is an ever increasing risk of dropping valves into the engine)
Note- The same shims are also suitable for adjusting the Lotus Esprit tappet clearances.
Copyright © 2013 Lotus Marques
Does Lotus Marques sell tappet shims for the Lotus twin cam engine?
If so, what thicknesses are available?
P.M. - Warriewood, NSW
ANSWER
Lotus Marques stocks a comprehensive range of shims 0.060" through to 0.180"
If you have a standard Lotus twin cam cylinder head with standard cams and standard base-circle, the shim size should be around 0.125"
The thinnest shim size that can be safely fitted into a stock Lotus twin cam engine is 0.070".
Beyond this point the valve spring retainer is about to make mechanical contact with the cam follower where the valve collets will be dislodged.
(installing shims thinner than 0.070" there is an ever increasing risk of dropping valves into the engine)
Note- The same shims are also suitable for adjusting the Lotus Esprit tappet clearances.
Copyright © 2013 Lotus Marques