MG Z Magnette
Modification to ZB Air Filter Unit
This modification to the ZB Oil Bath Type Air Filter unit, allows fitment of a
K&N type high flow FilterCharger elememt Part No. E-3492.
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1. Remove air filter lid and oil bath element.
2. Remove air filter assembly from air manifold.
3. Reverse the assembly on workbench and drill out the spot-welds holding the
element inner housing to the outer casing.
4. Gently separate the 2 parts by tapping the inner housing through.
5. The next stage is to reduce the height of the inner housing to leave a 1Omm
deep lip. This will locate the K&N filter and retain strength in the remaining
part of the housing. Use masking tape or a scriber to establish the
circumferential line. Carefully remove the excess metal with a hacksaw fitted
with a fresh HSS blade
NOTE: The new filter fits neatly within the housing.
6. Deburr the cut edge of the housing and protect with Black epoxy paint to
finish.
7. Reassemble the modified inner housing to the outer housing, no need to
spot-weld as the unit no longer needs to retain oil.
8. Fit the new element, as easy as that.
The new element comes already treated with K&N Filter oil ready to use.
9. The original outer casing and lid are retained.
9. No more messy oil bath cleaning or leakage.
JOHN RUSSELL
MGCC-Victoria
AUSTRALIA November 2005
