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ENGINE (4G6) – GENERAL
SECTION 1
ENGINE (4G6)
CONTENTS
General ....................................................1-1
1. Major Specifications....................................1-1
2. Engine Performance Curve.........................1-2
Base Engine (6 M/T) ...............................1-2
1. Cylinder head gasket...................................1-2
2. Pistons..........................................................1-3
3. Piston rings (2nd) ........................................1-3
4. Oil rings ........................................................1-4
5. Counterbalance shaft .................................1-4
6. Camshaft.......................................................1-5
Intake / Exhaust System (6 M/T)............1-6
1. Exhaust system ...........................................1-6
Control system (6 M/T)...........................1-8
1. Supercharging pressure control..............1-10
General
The 4G63-T/C engine fitted in the Lancer Evolution VIII MR is basically the same as the 4G63-T/C engine used in the Lancer
Evolution VIII.
The basic structure is the same in both the 6M/T (6-speed) and 5M/T (5-speed) versions, but the following improvements have
been made to the 6M/T version, in order to achieve higher performance.
• Adoption of 5-ply cylinder head gasket
• Addition of V-shaped groove in piston , and modified shape in cooling channel
• Reduced oil consumption by increasing tension in piston rings and reducing end-to-end gap
• Extra durability and reduced oil consumption by using new treatment on outer surface of oil ring side rail, and altering
thickness
• Lighter counterbalance shaft
• Increased output at high engine speeds by modifying intake cams
Major Specifications
Item 6 M/T 5M/T
Total Displacement cc 1997
Combustion chamber Pentroof type
Bore x stroke (mm) 85.0 x 88.0
Compression ratio 8.8
Camshaft arrangement DOHC-4 valve
Fuel Premium unleaded
Max. output (kW/rpm) 206/6500
Max. torque (Nm/rpm) 400/3500 392/3500
Fuel system Electronic controlled multipoint fuel injection
Ignition system Electronic controlled two-coil
Lash adjuster Equipped
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