Opel X16SZR

Opel X16SZRThe 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 codeX16SZR
LayoutFour stroke, Inline-4 (Straight-4)
Fuel typeGasoline (petrol)
Production
Displacement1.6 L, 1,598 cm3 (97.52 cu in)
Fuel systemSingle-point fuel injection system
Power adderNone
Power output75 PS (55 kW; 74 HP) at 5,200 rpm
Torque output128 N·m (13.1 kg·m, 94.3 ft·lb) at 2,800 rpm
Firing order1-3-4-2
Dimensions (L x W x H):
Weight

Cylinder block

Cylinder block
Cylinder block alloyCast-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:Top0.020-0.040 mm (0.0008-0.0016 in)
Second0.040-0.060 mm (0.0016-0.0024 in)
Oil0.010-0.030 mm (0.0004-0.0012 in)
Piston ring end gap:Top0.30-0.50 mm (0.0118-0.0197 in)
Second0.30-0.50 mm (0.0118-0.0197 in)
Oil0.40-1.4 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:INTAKE38.0 mm (1.4961 in)
EXHAUST31.0 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
Standard15.3 kg/cm2
Minimun12.2 kg/cm2
Compression differential limit between cylinders1.0 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 typeACEA 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 plugBosch: LR8LD+U
Spark plug gap1.0 mm (0.0394 in)
Spark plug tightening torque25 Nm (2.55 kg·m; 18.45 ft·lb)

Vehicle applications

ModelYears Produced
Opel/Vauxhall Astra
Opel/Vauxhall Zafira
Opel/Vauxhall Vectra
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We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.

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