The Opel Opel X16SZR is a 1.6 l (1,598 cc, 97.52 cu-in) straight-four four-stroke natural aspirated gasoline engine from the third generation of GM Family 1. The engine was developed by Opel (a subsidiary of General Motors).
The Opel X16SZR engine uses a cast-iron block with five-bearings crankshaft and aluminum head with single overhead camshafts (SOHC) and two valves per cylinder (8 valves in total). The engine is equipped with a single-point fuel injection system.
Cylinder bore and piston stroke are 79.0 mm (3.11 in) and 81.5 mm (3.21 in), respectively and compression ratio rating is 9.6:1. The X16SZR engine produces 75 PS (55 kW; 74 HP) at 5,200 rpm of maximum horsepower and 128 N·m (13.1 kg·m, 94.3 ft·lb) at 2,800 rpm of maximum torque.
The breakdown of the engine code is as follows:
- X – Euro 2 engine
- 16 – 1.6 Liter displacement
- S – Comression ratio from 9.5:1 to 10:1
- Z – Single Point Fuel Injection system
- R – Power is increased compared to X16SZ
General information
| Engine Specifications | |
| Engine code | X16SZR |
| Layout | Four stroke, Inline-4 (Straight-4) |
| Fuel type | Gasoline (petrol) |
| Production | – |
| Displacement | 1.6 L, 1,598 cm3 (97.52 cu in) |
| Fuel system | Single-point fuel injection system |
| Power adder | None |
| Power output | 75 PS (55 kW; 74 HP) at 5,200 rpm |
| Torque output | 128 N·m (13.1 kg·m, 94.3 ft·lb) at 2,800 rpm |
| Firing order | 1-3-4-2 |
| Dimensions (L x W x H): | – |
| Weight | – |
Cylinder block
| Cylinder block | ||
| Cylinder block alloy | Cast-iron | |
| Compression ratio: | 9.6:1 | |
| Cylinder bore: | 79.0 mm (3.11 in) | |
| Piston stroke: | 81.5 mm (3.21 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 5 | |
| Cylinder inner diameter (standard): | 78.975-78.985 mm (3.1092-3.1096 in) | |
| Piston skirt diameter (standard): | 78.955-78.965 mm (3.1085-3.1089 in) | |
| Piston pin outer diameter: | 17.997-18.000 mm (0.7085-0.7087 in) | |
| Piston ring side clearance: | Top | 0.020-0.040 mm (0.0008-0.0016 in) |
| Second | 0.040-0.060 mm (0.0016-0.0024 in) | |
| Oil | 0.010-0.030 mm (0.0004-0.0012 in) | |
| Piston ring end gap: | Top | 0.30-0.50 mm (0.0118-0.0197 in) |
| Second | 0.30-0.50 mm (0.0118-0.0197 in) | |
| Oil | 0.40-1.4 mm (0.0157-0.0551 in) | |
| Connecting rod center distance: | – | |
| Crankshaft bearing journal diameter: | 54.980-54.997 mm (2.1646-2.1652 in) | |
| Crankpin bearing diameter: | 42.971-42.987 mm (1.6918-1.6924 in) | |
Cylinder head
The cylinder head is made of an aluminum alloy. The X16SZR engine has single overhead camshaft, which is driven by a timing belt. Intake valves are 38.0 mm (1.4961 in) in diameter, and the exhaust valves are 31.0 mm (1.2205 in) in diameter.
| Cylinder head | ||
| Valve Arrangement: | SOHC, belt drive | |
| Cylinder head height: | 95.90-96.10 mm (3.7756-3.7835 in) | |
| Valves: | 8 (2 valves per cylinder) | |
| Valve timing: | INTAKE | – |
| EXHAUST | – | |
| Valve head diameter: | INTAKE | 38.0 mm (1.4961 in) |
| EXHAUST | 31.0 mm (1.2205 in) | |
Head tightening procedure and torque specs:
- Step 1: 25 N·m (2.5 kg·m, 18.4 ft·lb)
- Step 2: Turn all bolts 85°
- Step 3: Turn all bolts 85°
- Step 4: Turn all bolts 20°
Maintenance data
| Compression pressure | |
| Standard | 15.3 kg/cm2 |
| Minimun | 12.2 kg/cm2 |
| Compression differential limit between cylinders | 1.0 kg/cm2 |
| Oil system | |
| Oil consumption , L/1000 km (qt. per miles) | up to 0.5 (1 qt. per 1200 miles) |
| Recommended engine oil | 5W-30, 5W-40, 5W-50 |
| Oil type | ACEA A2-96 / A3-96 |
| Engine oil capacity (Refill capacity) | With filter change 3.5 L (3.7 US. qt, 3.08 Imp. qt.) |
| Oil change interval, km (miles) | 7,500 (5,000) |
| Ignition system | |
| Spark plug | Bosch: LR8LD+U |
| Spark plug gap | 1.0 mm (0.0394 in) |
| Spark plug tightening torque | 25 Nm (2.55 kg·m; 18.45 ft·lb) |
Vehicle applications
| Model | Years Produced |
| Opel/Vauxhall Astra | – |
| Opel/Vauxhall Zafira | – |
| Opel/Vauxhall Vectra | – |
I am looking for a used or refurbished Opel Vectra engine X16SZR(1.6L,SOHC)to replace in my Opel Vectra.
I will be glad to know the price of engine and shipping to Tema.
Kind regards.
I have attatched this engine to my daewoo lanos car 🙂