Pistons, Rings & Cylinder Liners - Lotus Elise S1 Service Notes

ENGINE
PISTONS, RINGS & CYLINDER LINERS
Pistons and connecting rods - remove
1. Suitably identify each piston assembly with its
respective cylinder liner.
2. Remove big-end bearings.
3. Using assistance, position cylinder block on its
side.
~ CAUTION: Ensure that feet of cylinder
/ j \ liner retainer clamps 18G 1736 do not
protrude over cylinder bores.
4. Remove ridge of carbon from top of each
cylinder liner bore.
5. Push pistons to top of their bores.
6. Carefully push out each piston assembly taking
care that big-ends do not contact surface of
cylinder liners.
7. Refit caps on to connecting rods, lightly tighten
dowel bolts.
~ CAUTION: Removal of pistons will
/ j \ necessitate removal and re-sealing of
cylinder liners.
Piston rings - checking
1. Using an expander, remove and discard old
piston rings.
Use squared off end of broken piston ring and 2.
3.
clean ring grooves.
Check new ring to groove clearance
12M1785
KB and K16-1.1 and 1.4
Top compression ring - A = 0.04 to 0.08 mm
2nd compression ring - B = 0.03 to 0.062 mm
Oil control rails - C = 0.044 to 0.55 mm
K16-1.6 and 1.8
Top compression ring - A = 0.040 to 0.072 mm
2nd compression ring - B = 0 030 to 0.062 mm
Oil control rails -C = 0.010 to 0.180 mm
9 2 OVERHAUL