Mitsubishi LANCER EVOLUTION-VII 2001, Technical Information Manual

Page: 22 / 171

ENGINE -
Base Engine
1-3
BASE ENGINE
PISTON
The top land height has been changed from 5 mm to 6 mm, and the second land height has been
changed from 4.5 mm to 5 mm.
<NEW> <OLD>
6 mm
5 mm
5 mm
4.5 mm
PISTON RING
The tension of the rings has been changed as shown in the table below, and the thicknesses of the
No. 2 ring and the oil ring have been reduced in order to provide reduced engine friction.
NEW OLD
PISTON RING No. 1 9.5 N 8.34 N
PISTON RING No. 2 7.0 N 10.49 N
OIL RING 25.0 N 33.34 N
PISTON RING No. 1 PISTON RING No. 2 OIL RING
0.20
∼
0.30 mm (New models)
0.25
∼
0.35 mm (Old models)
0.35
∼
0.50 mm (New models)
0.40
∼
0.55 mm (Old models)
0.10
∼
0.40 mm
1.2 mm
1.2 mm (New models)
1.5 mm (Old models)
2.0 mm (New
models)
2.8 mm (Old
models)
3.1 mm
3.5 mm (New models)
3.8 mm (Old models)
2.2 mm (New models)
2.5 mm (Old models)