Lotus 2004 Eleven Service Notes page 520

Lotus Service Notes
Supercharger Nose Assembly
If the supercharger input shaft oil seal should be damaged or found to leak, the complete nose assembly in-
cluding the nose housing, shaft, bearings and seals should be replaced as a unit by the following procedure:
Parts Required
Supercharger Nose Assembly
Oil Fill Kit
1. Remove the complete supercharger assembly from the engine (see above).
2. Use a strap wrench to hold the pulley, and remove the pulley nut. Use a three leg puller to withdraw the
pulley from the shaft. Apply forces only to the pulley and shaft end. Other techniques may damage the
housing or internal components.
3. Provision for collecting the contained oil before removing the 8 bolts securing the nose housing to the
main supercharger body. To separate the nose from the body, expanding jaw pliers should be used in the
recesses provided around the flange. Do not pry between the mating faces, or damage will be caused
and oil leaks result. Drain all the old lubricant from the gearcase and discard appropriately.
4. Stand the supercharger body on end with the gearcase uppermost. Discard the old synthetic drive cou-
pling, and fit the new part supplied in the oil fill kit onto the three pegs on the rotor drive gear. Check that
the two alignment dowels are fitted in the supercharger body flange.
5. Fill the gear case with 120 ml of Magnuson Products Supercharger oil as supplied in the oil fill kit.
6. Clean the mating face on the supercharger body and on the new nose housing, and apply a bead of Loc-
tite Eliminator Sealant, supplied in the oil fill kit, around the whole of the joint face on the nose housing,
looping around each of the fixing holes.
7. Before attempting to fit the nose housing, first align the three pins on the input shaft with the vacant holes
in the drive coupling. Place the nose housing into postition, and ensure that the two alignment dowels
engage with their corresponding holes. It may be necessary for the casing bolts to be used to pull the two
housings together.
8. If re-using the casing joint bolts, the threads should be thoroughly cleaned before applying Loctite 242 or
equivalent medium strength threadlocking compound. New casing bolts are pre-treated. Fit the eight bolts
and tighten progressively to pull the joint evenly together. Finally torque tighten to 27 Nm in the pattern
shown.
Tightening sequence
9. Fit and secure the oil service plug, and position mark. Refit the supercharger.
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