Mitsubishi Lancer Evolution VIII MR - Pistons Modifications; Piston Rings (2 nd) Changes

ENGINE (4G6) – BASE ENGINE (6 M/T)
1-3
2. Pistons
• Addition of V-shaped groove.
A V-shaped groove has been formed in the second land, with a view to reducing oil consumption.
•
Modification of cooling channel.
The shape of the cooling channel, which recycles the oil, has been modified in order to improve recycling efficiency.
Modified shape of
cooling channel
V-shaped
groove added
3. Piston Rings (2nd)
To increase the tension in the piston rings, they have been changed
to ductile cast iron, from the standard cast iron used previously.
The end to end gap in the rings was also reduced.
These modifications are designed to reduce oil consumption.
Item Evolution VIII MR Evolution VIII
Tension 10.5 N 7.0 N
End to end gap 0.30 – 0.45 mm 0.35 – 0.50 mm
End to end gap