Opel X12XE

The Opel X12XE is a 1.2 l (1,199 cc, 73.17 cu-in) straight-four 4-stroke natural aspirated gasoline small-displacement engine developed by Opel, at the time a subsidiary of General Motors. The engine was manufactured from 1998 to 2000.

The X12XE engine uses a light-weight cast-iron semi-closed deck engine block with a cast-iron crankshaft and aluminum head with dual chain-driven overhead camshafts (DOHC) and four valves per cylinder (16 valves in total). The engine is equipped with Bosch Motronic M1.5.5 (Euro II).

Bore and stroke are 72.5 mm (2.85 in) and 72.6 mm (2.86 in), respectively. Compression ratio rating is 10.1:1. The X12XE engine produces 65 PS (48 kW; 64 HP) at 5,600 rpm of maximum horsepower and 110 Nm (11.2 kg·m; 81.2 ft·lb) at 4,000 rpm of peak torque.

The breakdown of the engine code is as follows:

• X – Euro 2 engine
• 12 – 1.2 Liter displacement
• X – Comression ratio from 10 to 11.5:1
• E – Multi Point Fuel Injection system

General information

Cylinder block

The engine used a cast-iron semi-closed deck cylinder block and a cast-iron crankshaft five-bearings supported system. Bore and stroke are 72.5 mm (2.85 in) and 78.6 mm (3.09 in). Compression ratio rating is 10.1:1.

Cylinder head

The cylinder head is made of an aluminum alloy. The X12XE engine has chain-driven dual overhead camshafts. Valves are actuated via roller finger followers with hydraulic tappets.

Head tightening procedure and torque specs:

• Step 1: 25 Nm (2.5 kg·m, 18.4 ft·lb)
• Step 2: Turn all bolts 60°
• Step 3: Turn all bolts 60°
• Step 4: Turn all bolts 60°

Maintenance data

Vehicle applications

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