Base Engine; Piston; Piston Ring - Mitsubishi LANCER EVOLUTION-VII 2001 Technical Information Manual

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>
6 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.
PISTON RING No. 1
PISTON RING No. 2
OIL RING
PISTON RING No. 1
0.20 ∼ 0.30 mm (New models)
0.25 ∼ 0.35 mm (Old models)
3.1 mm
ENGINE -
5 mm
NEW
9.5 N
7.0 N
25.0 N
PISTON RING No. 2
1.2 mm
3.5 mm (New models)
3.8 mm (Old models)
Base Engine
5 mm
OLD
8.34 N
10.49 N
33.34 N
0.35 ∼ 0.50 mm (New models)
0.40 ∼ 0.55 mm (Old models)
1.2 mm (New models)
1.5 mm (Old models)
2.2 mm (New models)
2.5 mm (Old models)
<OLD>
OIL RING
0.10 ∼ 0.40 mm
2.0 mm (New
models)
2.8 mm (Old
models)
1-3
4.5 mm