General data
| Engine type | 4-cylinder in-line, overhead camshaft, water-cooled | |
| Engine code | SN (since August 1975.), CL (since May 1976.) | |
| Cylinder diameter | 86.5 mm | |
| Piston stroke | 84.4 mm | |
| Working volume | 1984 cm³ | |
| Compression ratio | 8.2:1 | |
| Maximum output power | 55 kW (72 hp) at 4300 rpm | |
| Maximum torque | 150 Nm at 2400 rpm | |
| Compression in cylinders (hot engine, throttle wide open): | ||
| Engine code SN | Engine code CL | |
| Normal (the engine is in good condition) | 8-11 bar | 7-10 bar |
| Minimum | 6 bar | 5 bar |
| Maximum difference between compression in different cylinders | 3 bar | 3 bar |
Crankshaft
| Number of main bearings | 5 |
| Main journal diameter (standard): Up to engine number SR 010 673 | 59.958-59.978 mm |
| C engine number CH 010 674 | 63.958-63.978 mm |
| Repair dimensions | -0.25, 0.50 and 0.75 mm |
| Crankpin diameter (standard) | 47.958-47.978 mm |
| Main bearing working clearance: New bearing | 0.02-0.08 mm. |
| Acceptable limit | 0.16 mm |
| Connecting rod bearing working clearance: New bearing | 0.02-0.07 mm |
| Acceptable limit | 0.10 mm |
| Axial displacement of the crankshaft: New crankshaft | 0.10-0.19 mm |
| Acceptable limit | 0.25 mm |
| connecting rod lateral play: New connecting rod | 0.05-0.30 mm |
| Acceptable limit | 0.40 mm |
Pistons and piston rings
| Standard piston diameter (3 classes) | 86.46, 86.49 and 86.50 mm |
| Corresponding cylinder diameter | 86.51, 86.52 and 86.53 mm |
| Repair dimensions | +0.25, 0.50 and 1.00 mm |
| Lateral clearance of piston ring in groove: New | 0.04-0.07 mm |
| Wear limit | 0.1 mm. |
| Ring lock gap: New | 0.3-0.5 mm |
| Wear limit | 1.0 mm |
| Position of the ring locks | They are spaced relative to each other by 120° |
Camshaft
| Number of bearings | 5 |
| Soybean movement | 0.2 mm (maximum) |
| Runout of the central bearing | 0.02 mm (maximum) |
Cylinder head
| Material | Light alloy |
| Limit deformation of the contact surface with the cylinder block | 0.1 mm |
Valves and guide bushings
| Length of valve guide bushings (from the retaining ring to the edge of the sleeve): Intake valves | 17.0 mm | |
| Exhaust valves | 23.7 mm | |
| Valve stem clearance in the guide bushing (measured by rocking the valve head, see text): Intake valves | 0.9 mm (maximum) | |
| Exhaust valves | 1.1 mm (maximum) | |
| Valve timing (with a valve lift of 1.0 mm): The inlet valve opens | 2° before TDC | |
| The inlet valve closes | 35° after TDC | |
| The exhaust valve opens | 72° BDC | |
| The exhaust valve closes | 11° after t.m. | |
| Valve clearances | Cold engine | Hot engine |
| Intake valves | 0.10-0.15 mm | 0.20-0.25 mm |
| Exhaust valves | 0.40-0.45 mm | 0.45-0.50 mm |
Lubrication system
| Crankcase capacity: Without filter replacement | 4.0 l |
| With filter replacement | 4.5 l |
| Oil pressure (oil temperature 80°C, engine speed 2000 rpm) | 3.0-4.0 bar |
| Oil pump clearances: Circumferential clearance of gears | 0-0.13 mm |
| Axial clearance of gears | 0.03-0.07 mm |
Tightening torque (Nm)
| Clutch housing bolts;M8 | 25 |
| M12 | 75 |
| Engine mount nuts and bolts | 45 |
| Crankshaft pulley bolt | 300 |
| Water pump bolts | 22 |
| Cylinder head bolts (loosen 30° before tightening): Cold engine | 100 |
| Warm engine | 120 |
| Clutch housing bolts | 30 |
| Pallet screws: M6 | 8 |
| M8 | 15 |
| Rear Cylinder Head Bolts | 10 |
| Oil pump intake pipe bolts | 10 |
| Thermostat housing cover bolts | 10 |
| Main bearing cap bolts: With hex head | 80 |
| With a hole in the head for a hexagon | 65 |
| Connecting rod cap bolts | 60 |
| Fan blade bolts | 25 |
| Oil pump mounting bolts | 10 |
| Camshaft sprocket bolt | 80 |
| Camshaft bearing cap bolts | 10 |
| Camshaft bearing cap nuts | 20 |
| Oil pressure relay | 10 |
| Coolant temperature sensor | 8 |
| Drain plug of the pan | 40 |
| Timing belt tensioner retaining bolt | 40 |
| Timing belt tensioner mounting bolts | 20 |
| Flywheel bolts | 90 |
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