Contents: General information ⤓ Engine 1.5L ⤓ Pistons and rings ⤓ Engine 1.8L ⤓ 1.8L engines; 2.0L and 2.4L ⤓
General information
Compression pressure in cylinders (at 250 rpm) - 13.5 kg/cm²
Oil pressure (engine warmed up) — 0.77 kg/cm² minimum at idle
Engine 1.5L
Maximum curvature (non-flatness) of the cylinder head
- Standard - 0.05 mm
Operational limit
- Mirage 1990 and later - 0.2mm
- All others - 0.1 mm
Valves and related components
Valve edge width
Inlet
Standard - 1.0 mm
Operational limit - 0.5 mm
Outlet
Standard - 1.5 mm
Operational limit - 1.0 mm
Valve stem diameter (inlet and outlet) - 6.6 mm
Clearance between valve stem and guide
Intake (Mirage 1989 and later only)
Standard - 0.02 - 0.05 mm
Operational limit - 0.10 mm
Intake (all others)
Standard - 0.03 - 0.06 mm
Operational limit - 0.10 mm
Graduation (all)
Standard - 0.05 - 0.09 mm
Operational limit - 0.15 mm
Valve spring
The limit of non-flatness is 3 degrees
Effort
Mirage 1991 and later
Inlet - 25 kg at 5 cm
Graduation - 31 kg at 5 cm
All others (inlet and outlet) - 26 kg at 5 cm
Height of installed spring - 36 mm
Free length
Mirage 1991 and later
Inlet - 46.1 mm
Exhaust - 46.8 mm
All others (intake and exhaust) - 44.6 mm
Injector valves
- Rod diameter - 4.30 mm
- The angle between the valve end and the seat is 45 degrees
Spring
- Free length - 29.60 mm
- Force - 3.5 kg at 21.5 mm
Crankshaft and connecting rods
Crank pin
- Diameter - 42 mm
- Out-of-round/taper limit - 0.01 mm
- Bearing clearance - 0.014 - 0.044 mm
- Connecting rod axial clearance (side clearance) - 0.10 - 0.25 mm
Neck of the root
- Diameter - 48 mm
- Out-of-round/taper limit - 0.01 mm
- Runout limit - 0.03 mm
- Bearing lubrication gap - 0.02 - 0.07 mm
- Crankshaft axial clearance - 0.05 - 0.18 mm
Cylinder liner
- Diameter (nominal) - 75.5 mm
- Non-round/taper limit – 0.02 mm
Pistons and rings
- Piston diameter (nominal) - 75.5 mm
- The gap between the piston and the cylinder is 0.02-0.04 mm
Piston ring gap
Compression rings
- Standard - 0.20 - 0.35 mm
- Operational limit - 0.8 mm
Oil scraper ring
- Standard - 0.20 - 0.70 mm
- Operational limit - 1.0 mm
Lateral clearance of piston ring in groove
Compression ring #1 (upper)
- Standard - 0.03 - 0.07 mm
- Operational limit - 0.15 mm
Compression ring #2
- Standard - 0.02 - 0.06 mm
- Operational limit - 0.12 mm
* Measured 2mm above the bottom edge of the skirt
Tightening torques for threaded connections Nm
Main Bearing Cap Bolts - 49 to 45
Connecting rod cap nuts
Mirage 1990 and later
- Step 1 - 20
- Step 2 - Turn another 1/4 turn (90 degrees)
- All others - from 31 to 34
- Injector valves - from 13 to 16
Note: See Part A for additional tightening torques.
Engine 1.8L
Maximum curvature (non-flatness) of the cylinder head
Standard - 0.05 mm
Operational limit
Mirage 1990 and later - 0.2 mm
All others - 0.1 mm
Valves and related components
Valve edge width
Intake (DOHC)
Standard - 1.0 mm
Operational limit - 0.7 mm
Intake (SOHC)
Standard - 1.5 mm
Operational limit - 1.0 mm
Graduation (all)
Standard - 1.5 mm
Operational limit - 1.0 mm
SOHC valve stem diameter (intake and exhaust) - 8.0 mm
DOHC
- Inlet - 6.6 mm
- Exhaust - 6.5 mm
Clearance between valve stem and guide
Intake (SOHC)
- Standard - 0.03 - 0.06 mm
- Operational limit - 0.10 mm
Intake (DOHC)
- Standard - 0.02 - 0.05 mm
- Operational limit - 0.10 mm
Graduation (all)
- Standard - 0.05 - 0.09 mm
- Operational limit - 0.15 mm
Valve spring
- The limit of non-flatness is 4 degrees
- Force - 24 kg at 27.3 mm
- Height of installed SOHC spring - 37.3 mm
- DOHC - No data
- Free length SOHC - 44.6 mm
- DOHC - 48.3 mm
Injection valves (SOHC only)
- Rod diameter - 4.30 mm
- The angle between the valve end and the seat is 45 degrees
Spring
- Free length - 29.60 mm
- Force - 34.3 N at 21.5 mm
Crankshaft and connecting rods
Crank pin
- Diameter - 45 mm
- Out-of-round/taper limit - 0.015 mm
- Bearing clearance - 0.02 - 0.05 mm
- Connecting rod axial clearance (side clearance) - 0.10 - 0.25 mm
Neck of the root
- Diameter - 57.0 mm
- Out-of-round/taper limit - 0.015 mm
- Runout limit - 0.005 mm
- Bearing clearance - 0.02 - 0.05 mm
- Crankshaft axial clearance - 0.05 - 0.18 mm
Cylinder liner
- Diameter (nominal) SOHC - 76.9 mm
- DOHC - 82.3 mm
- SOHC out-of-round/taper limit - 0.02 mm
- DOHC - 0.01 mm
Pistons and rings
Piston diameter (nominal)*
- SOHC - 76.9 mm
- DOHC - 82.3 mm
Clearance between piston and cylinder
- SOHC 1985 and 1986 - 0.02 - 0.04 mm
- 1987 and 1988 - 0.03 - 0.05 mm
- DOHC 1989 - 0.03 - 0.05 mm
- 1990 and later - 0.02 - 0.04 mm
Piston ring gap
Compression rings (SOHC)
Compression ring #1 (upper)
- Standard - 0.25 - 0.40 mm
- Operational limit— 0.08 mm
Compression ring #2
- Standard - 0.20 - 0.35 mm
- Operational limit - 0.08 mm
Oil scraper ring (SOHC)
- Standard - 0.20 - 0.70 mm
- Operational limit - 0.10 mm
Compression rings (DOHC)
Compression ring #1 (upper)
- Standard - 0.25 - 0.40 mm
- Operational limit - 0.80 mm
Compression ring #2
- Standard - 0.35 - 0.50 mm
- Operational limit - 0.08 mm
Oil scraper ring (DOHC)
- Standard - 0.20 - 0.70 mm
- Operational limit - 0.10 mm
Piston ring groove side clearance SOHC
Compression ring #1 (upper)
- Standard - 0.03 - 0.07 mm
- Operational limit - 0.10 mm
(Original source of information: MitsubishiMan.ru)
Compression ring #2
- Standard - 0.02 - 0.06 mm
- Operational limit - 0.10 mm
DOHC
- Standard - 0.03 - 0.07 mm
- Operational limit - 0.10 mm
* Measured 2mm above the bottom edge of the skirt
Tightening torques for threaded connections Nm
SOHC
- Main Bearing Cap Bolts - 49 to 54
- Connecting rod cap nuts - 31 to 34
- Pressure reducing valve plug - from 37 to 40
- Injector valves - from 17 to 22
- DOHC Main Bearing Cap Bolts - 65 to 70
- Connecting rod cap nuts - 49 to 52
- Oil pressure relief valve plug - 40 to 49
* Note: See Part A for additional tightening torques.
1.8L engines; 2.0L and 2.4L
Maximum curvature (non-flatness) of the cylinder head
Standard - 0.05 mm
Operational limit - 0.2 mm
Valves and related components of the timing system
Valve edge width
SOHC
Inlet
- Standard - 1.2 mm
- Operational limit - 0.7 mm
Outlet
- Standard - 2.0 mm
- Operational limit - 1.5 mm
DOHC
Inlet
- Standard - 1.0 mm
- Operational limit - 0.7 mm
Outlet
- Standard - 1.5 mm
- Operational limit - 1.0 mm
Valve stem diameter
SOHC (intake and exhaust) - 8.0 mm
DOHC
- Inlet - 6.58 mm
- Exhaust - 6.55 mm
Clearance between valve stem and guide
SOHC
Inlet
- Standard - 0.03 - 0.06 mm
- Operational limit - 0.10 mm
Outlet
- Standard - 0.05 - 0.09 mm
- Operational limit - 0.15 mm
DOHC
Inlet
- Standard - 0.02 - 0.05 mm
- Operational limit - 0.10 mm
Outlet
- Standard - 0.05 - 0.09 mm
- Operational limit - 0.15 mm
Valve spring
- The limit of non-viscosity is 3 degrees
- Galant DOHC 1990 and later torque - 300 N
- All others - 322 H
- Height of installed spring 2.4L; 1.8L and 2.0L (except Galant) - 40.4 mm
- 2.0L Galant (SOHC and DOHC) - No data
- Free Length SOHC Cordia/Tredia 1.8L (1983-1986) — 47.5 mm
- 1.8L (1987- 1988) — 49.8 mm
- 2.0L (1984 and 1985) - 47.5 mm
- 2.0L (1986 -1988) — 49.8 mm
- SOHC Galant 2.4L (1985-1987) — 49.8 mm
- 2.0L (since 1989) — 49.8 mm
- DOHC Galant 2.0L (before March 1988) - 45.8 mm
- 2.0L (after April 1988) - 48.3 mm
Injector valves
- Rod diameter - 4.30 mm
- The angle between the valve end and the seat is 45 degrees
Spring
- Free length - 29.60 mm
- Force - 34.3 N at 21.5 mm
Crankshaft and connecting rods
Crank pin
- Diameter - 45 mm
- Out-of-round/taper limit - 0.01 mm
- Bearing clearance - 0.02 - 0.05 mm
- Connecting rod axial clearance (side clearance) - 0.10 - 0.25 mm
Neck of the root
- Diameter - 57.0 mm
- Runout limit - 0.016 mm
- Maximum taper - 0.005 mm
- Bearing lubrication gap - 0.02 - 0.05 mm
- Crankshaft axial clearance - 0.05 - 0.18 mm
Cylinder liner
Diameter (nominal)
- Cordia/Tredia 1983-1985 1.8L - 85.0 mm
- 1986-1988 1.8L — 80.6 mm
- 1984-1988 2.0L — 85.0 mm
- Galant 2.4L — 86.5 mm
- 2.0L (SOHC and DOHC) - 85.1 mm
- Out-of-round/taper limit - 0.02 mm
Pistons and rings
Piston diameter (nominal)*
- 2.4L — 86.5 mm
- 2.0L and 1.8L without turbo - 85.0 mm
- 1.8L Turbo - 80.6mm
Clearance between piston and cylinder
- 2.4L — 0.02-0.04 mm
- 2.0L and 1.8L without turbocharging - 0.01-0.03 mm
- 1.8L turbocharged - 0.03-0.05 mm
Piston ring gap
1.8L Naturally Aspirated 2.0L SOHC (except 2.0L Galant)
Compression ring #1 (upper)
- Standard - 0.25 - 0.45 mm
- Operational Limit - No data
Compression ring #2
- Standard - 0.20 - 0.40 mm
- Operational Limit - No data available
Oil scraper ring
- Standard - 0.20 - 0.70 mm
- Operational Limit - No data available
1.8L Turbocharged SOHC
Compression ring #1
- Standard - 0.30 - 0.45 mm
- Operational Limit - No data available
Compression ring #2
- Standard - 0.20 - 0.35 mm
- Operational Limit - No data available
Oil scraper ring
- Standard - 0.20 - 0.70 mm
- Operational Limit - No data
2.4L and 2.0L DOHC
Compression ring #1
- Standard - 0.25 - 0.40 mm
- Operational limit - 0.80 mm
Compression Ring #2 (2.4L only)
- Standard - 0.20 - 0.40 mm
- Operational limit - 0.80 mm
Compression Ring #2 (2.0L only)
- Standard - 0.35 - 0.50 mm
- Operational limit - 0.80 mm
Oil scraper ring
- Standard - 0.20-0.70 mm
- Operational limit - 0.10 mm
2.0L SOHC Galant
Compression ring #1
- Standard - 0.25 - 0.40 mm
- Operational limit - 0.80 mm
Compression ring #2
- Standard - 0.20 - 0.35 mm
- Operational limit - 0.80 mm
Oil scraper ring
- Standard - 0.20 - 0.70 mm
- Operational limit - 0.10 mm
Lateral clearance of piston ring in groove
2.4L (1985-1987)
Compression ring #1 (upper)
- Standard - 0.05 - 0.09 mm
- Operational Limit - No data available
Compression ring #2
- Standard - 0.02 - 0.06 mm
- Operational Limit - No data
2.4L (1988 only) and 2.0L SOHC Galant
Compression ring #1 (upper)
- Standard - 0.03 - 0.07 mm
- Operational limit - 0.10 mm
Compression ring #2
- Standard - 0.02 - 0.06 mm
- Operational limit - 0.10 mm
SOHC 2.0L and 1.8L (except 2.0L Galant)
Compression ring #1 (upper)
- Standard - 0.045 - 0.085 mm
- Operational Limit - No data available
Compression ring #2
- Standard - 0.02 - 0.06 mm
- Operational Limit - No data available
2.0L DOHC
Both compression rings
- Standard - 0.03 - 0.07 mm
- Operational limit - 0.10 mm
*Measured 2mm above the bottom edge of the skirt
Tightening torques for threaded connections Nm
SOHC Main Bearing Cap Bolts - 49 to 54
DOHC — from 65 to 70
SOHC Connecting Rod Cap Nuts - 31 to 34
DOHC — from 49 to 52
Injector valves - from 17 to 22
Oil relief valve plug - 40 to 49
Note: See Part A for additional tightening torques.