Lotus Elise Service Notes page 153

ENGINE
Inspection
12M1767
12M1768
1. Remove 2 screws and cover plate.
2. Remove and discard cover plate seal.
« CAUTION: Two types of oil pump have
/ j \ been fitted. The early type oil pumps, fitted
up to Engine No. 820000, can be identified
by having either a plain 6 mm diameter oil feed
hole or an 8 mm diameter oil feed hole with a 6
mm counterbore - A in illustration. Later type oil
pumps, fitted from Engine No. 820000 all have a
12 mm diameter oil feed hole with an 8 mm
diameter offset counterbore - B in illustration.
Later type oil pumps may be fitted as
replacements to all engines but early type
pumps may not be fitted to engines from Engine
No. 820000.
4. Remove all traces of Loctite Irom cover plate
securing screws and tapped holes in oil pump
body; ensure screw holes are clean and dry.
8 R M 3 4 6 8
3. Check rotor clearances:
a. Outer rotor to housing = 0.28 - 0.36 mm
b. Inner rotor tip = 0.05 - 0.13 mm
c. Rotor end float = 0.02 - 0.06 mm
Renew pump assembly if housing is scored or
clearances are excessive.
1 6 OVERHAUL