General characteristics
Engine type - 4-cylinder in-line with overhead camshaft, transversely mounted
| Engine designation and volume | Code | Volume |
| 1.6 liters | CA 16S | 1598 cm³ |
| 1.8 liters with carburetor | CA 18NS | 1796 cm³ |
| 1.8 liter turbocharged | SA 18ET | 1809 cm³ |
| 2.0 liters with carburetor | CA 20S | 1974 cm³ |
| 2.0 liters with fuel injection | CA 20E | 1974 cm³ |
| 2.0 liter diesel | LD 20 | 1952 cm³ |
| Dimensions | Move | Diameter |
| CA 16S | 78.0 mm | 83.6 mm |
| CA 18NS | 82.7 mm | 83.6 mm |
| SA 18ET | 83.0 mm | 83.6 mm |
| CA 20S, CA 20E | 84.5 mm | 88.0 mm |
| LD 20 | 85.0 mm | 86.0 mm |
Compression ratio:
- CA 16S (up to engine number 190258 - July 1987) — 9.0:1
- CA 16S (from engine number 190259) and CA 18NS - 9.6:1
- CA 18ET - 8.0:1
- CA 20S, CA 20E - 9.4: 1
- LD 20 — 21.3:1
Crankshaft rotation direction - Clockwise (looking from the right side of the car)
Compression pressure (at engine cranking speed, the engine is hot):
- Standard:
- Turbo - 1177 kPa
- All other models - 1196 kPa
- Minimum:
- Turbo - 883 kPa
- All other models - 902 kPa
Maximum difference between cylinders - 98 kPa
Valve clearances
- Inlet:
- Engine hot - 0.30 mm
- Engine cold (refrigerant temperature up to 20°C) — 0.21 mm
- High school graduation:
- Engine hot - 0.30 mm
- Engine cold (refrigerant temperature up to 20°C) — 0.23 mm
Valve springs
Standard free height:
- External - 49.98 mm
- Internal - 44.10 mm
Camshaft
Bearing journal diameter:
- Numbers 1-4 - 45.935-45.955 mm
- Number 5 - 45.915-45.935 mm
The maximum clearance in the bearing journals is 0.10 mm
Maximum camshaft play - 0.20 mm
Cam Length:
- CA 16S - 38.225-38.305 mm
- CA 18NS - No information
- SA 18ET - 38.391-38.471 mm
- CA 20S:
- Intake - 38.225-38.305 mm
- Graduation - 38.391-38.471 mm
- CA 20E - 38.819-38.899 mm
Maximum permissible wear - 0.20 mm
Cylinder head
Material: Light alloy
Max. permissible distortion of the surface for the gasket - 0.1 mm
Clearance between valve stem and guide:
- Inlet - 0.020-0.053 mm
- Graduation - 0.040-0.073 mm
Wear limit - 0.1 mm
Valve chamfer angle - 45°15' - 45°45'
Valve seat chamfer angle - 45°
Valve stem diameter:
- Intake - 6.965-6.980 mm
- Graduation - 6.945-6.960 mm
Valve guide outer diameter - 11.023-11.034 mm
Valve guide play in the head - 0.027-0.059 mm
Valve guide inner diameter - 7.000-7.018 mm
Cylinder block
Material – Cast iron
Permissible distortion of the surface for the gasket - 0.1 mm
Cylinder bore diameter:
- CA 16S - 77.950-78.000 mm
- CA 18NS - No information
- SA 18ET - 83.000-83.050 mm
- CA 20S, CA 20E - 84.500-84.550 mm
The maximum permissible taper is 0.02 mm
The maximum permissible ovality is 0.02 mm
Pistons and rings
Skirt diameter - (20 mm above the base of the skirt):
- CA 16S - 77.915-77.965 mm
- CA 18NS - 82.665-82.715 mm
- SA 18ET - 82.965-83.015 mm
- CA 20S, CA 20E - 84.465-84.515 mm
Allowable increase in size:
- Early CA 18NS - 0.30 mm, 0.80 mm
- Late CA 18NS, and all other models - 0.50 mm, 1.00 mm
Gap cylinder - piston - 0.025-0.045 mm
Outer diameter of piston pin - 19.995-20.000 mm
Piston pin clearance in piston - 0.008-0.012 mm
Piston pin fit in connecting rod - 0.017-0.038 mm
Side ring clearances:
- Upper - 0.040-0.073 mm
- Second - 0.030-0.063 mm
- Wear limit - 0.1 mm
Ring cutting gap:
- Upper:
- CA 16S - 0.20-0.46 mm
- CA 18NS - No information
- CA 18ET - 0.19-0.42 mm
- CA 20S, CA 20E - 0.25-0.51 mm
- Second:
- CA 16S - 0.14-0.41 mm
- CA 18NS - No information
- CA 18ET - 0.15-0.41 mm
- CA 20S - 0.25-0.51 mm
- CA 20E - 0.15-0.31 mm
- Oil scraper - 0.20-0.76 mm
Crankshaft
Number of main bearings - Five
Diameter of main journals - 52.951-52.964 mm
The diameter of the connecting rod journals is 44.961-44.974 mm
Permissible taper of main and connecting rod journals - 0.03 mm maximum
Permissible ovality of main and connecting rod journals - 0.03 mm maximum
Crankshaft play - 0.3 mm maximum
Working clearance of main bearings (standard) — 0.020-0.047 mm
Wear limit - 0.1 mm maximum
Changing the dimensions of the main bearings - 0.25 mm, 0.50 mm
Connecting rods
Side clearance - 0.2-0.3 mm
Wear limit - 0.3 mm
Bearing clearance of the lower end of the connecting rod - 0.1 mm maximum
The external size of the connecting rod lower head bearing is 0.08 mm, 0.12 mm, 0.25 mm, 0.50 mm
Lubrication system
System pressure (oil temperature 77-83°C):
- Idle speed - 59 kPa minimum
- Frequency 3200 rpm - 324-510 kPa
Oil filter – Champion C109
Oil type - Universal motor oil, API SF or SG. Viscosity SAE 10W/30 - 20W/50 (Duckhams QXR, Hypergrade, or 10W/40)
Oil pump clearances:
- Between the internal gear and the crescent - 0.12-0.23 mm
- Between the outer gear and the crescent - 0.21-0.32 mm
- Between the external gear and the housing - 0.11-0.20 mm
- External gear clearance - 0.05-0.11 mm
- Internal gear clearance - 0.05-0.09 mm
Tightening torques Nm
Valve cover screws - 1-3
Rocker adjuster screw locknut - 18-22
Rocker axle mounting bolts - 18-22
Left cylinder head cover bolts - 6-10
Fuel pump mounting plate bolts - 78-88
Bolt of the conceived camshaft pulley - 78-88
Drive timing belt housing bolts - 3-5
Cylinder head bolts:
- Stage 1 - 29
- Stage 2 - 78
- Stage 3 - Completely loosen all bolts
- Stage 4 - 29
- Stage 5 - 74-83 or twist 83°-88° (bolt 8), 75° - 80 (all other bolts) clockwise
Toothed belt tensioning mechanism bolts A and B - 15-20
Crankshaft pulley bolt - 123-132
Oil pump mounting bolt (big) — 12-16
Oil Pump Mounting Bolts (small) — 6-7
Oil exhaust pipe and strainer bolts - 10-14
Oil pump cover screws - 4-5
Pressure regulator cover - 39-49
Pan bolts:
- Models 2.0 liters with fuel injection - 7-8
- All other models - 5-7
Crankcase ventilation partition mounting bolts - 4-6
Release bearing cover mounting bolts - 44-54
Connecting rod nuts - 32-36
Crankshaft oil seal retainer bolts - 4-6
Flywheel/drive plate - 98-108
Oil pressure sensor - 10-16
Oil cooler retainer mounting nuts - 20-25
Oil cooler/rack - 29-39
Generator mounting bolts (and air conditioning compressor) to the cylinder block - 69-78
Engine front and rear struts - 43-58
Oil pan drain plug - 29-39
Engine mounting in the longitudinal part:
- 2.0 liter models with fuel injection system:
- Front bolts - 39-49
- Rear bolts - 49-59
- All other models - 39-49
Front strut upper nuts - 59-79
Rear strut nuts - 39-49
Wing group bolts - 39-49
All other bolts and nuts - 39-49