Lotus Elise S1 Service Notes page 238

ENGINE
Piston rings
New ring to groove clearance:
K8 and K16 -1.1 and 1.4
Top compression ring 0.04 to 0.08 mm
2nd compression ring 0.03 to 0.062 mm
Oil control rails 0.044 to 0.055 mm
K16-1.6 and 1.8
Top compression ring 0.040 to 0.072 mm
2nd compression ring 0.030 to 0.062 mm
Oil control rails 0.010 to 0.180 mm
Ring fitted gap 20 mm from top of bore:
KB and K16 -1.1 and 1.4
Top compression ring 0.17 to 0.37 mm
2nd compression ring 0.37 to 0.57 mm
Oil control rails 0.15 to 0.40 mm
K16-1.6 and 1.8
Top compression ring 0.20 to 0.35 mm
2nd compression ring 0.28 to 0.48 mm
Oil control rails 0.15 to 0.40 mm
Piston diameter
K8 and K16 -1.1 and 1.4
Grade A 74.940 to 74.955 mm
Grade B 74.956 to 74.970 mm
Clearance in bore 0.015 to 0.045 mm
Maximum ovality 0.3 mm
K16 -1.6 and 1.8
Grade A 79.975 to 79.990 mm
Grade B 79.991 to 80.005 mm
Clearance in bore 0.01 to 0.04 mm
Maximum ovality 0.3 mm
Cylinder block
Cylinder liner bore:
K8and K16-1.1 and 1.4
RED grade A 74.970 to 74.985 mm
BLUE grade B 74.986 to 75.000 mm
K16-1.6 and 1.8
RED grade A 80.000 to 80.015 mm
BLUE grade B 80.016 to 80.030 mm
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DATA, TORQUE & TOOLS