Opel Corsa B 1993–2000 Service and Repair Manual: General description

The engine is of four-cylinder. in-line overhead valve type, mounted transversely at the front of the car.

The crankshaft is supported in three shell type main bearings. Thrustwashers are incorporated in the centre main bearing to control crankshaft endfloat.

The connecting rods are attached to the crankshaft by horizontally split shell type big-end bearings. and to the pistons by gudgeon pins which are an interference fit in the connecting rod small-end bore. The aluminium alloy pistons are of the slipper type and are fitted with three piston rings: two compression rings and an oil control ring.

The camshaft is chain driven from the crankshaft and operates the rocker arms via tappets and short pushrods. The inlet and exhaust valves are each closed by a single valve spring and operates in guides, integral with the cylinder head. The valves are actuated directly by the rocker arms.

Engine lubrication is by a gear type oil pump. The pump is mounted beneath the crankcase and is driven by a camshaft, as are the distributor and fuel pump.

Many of the engine component retaining bolts are of the socket-headed type and require the use of Torx type multi-tooth keys or socket bits for removal. These are readily available from retail outlets and should be obtained if major dismantling or repair work is to be carried out on the engine.

    OHV engine
    Specifications General Valve clearances (warm) Cylinder head Valves and guides Camshaft Pistons and bores Piston rings Gudgeon pins Crankshaft and bearin ...

    Compression test - description and interpretation
    1. When engine performance is down, or if misfiring occurs which cannot be attributed to the ignition or fuel systems, a compression test can provide diagnostic clues as to the engine's condition. ...

    See also:

    Opel Corsa B 1993–2000 Service and Repair Manual. Inlet manifold - removal and refitting
    Removal 1.2 litre models 1. The manifold may be removed with or without the carburettor. In either case and follow the steps preparing for carburettor removal. 2. Disconnect the brake servo vacuu ...