INTRODUCTION - CYLINDER HEAD(S)

1.4 16v

CONSTRUCTION SPECIFICATIONS

The cylinder head is a one-piece cylinder head in aluminium alloy.

The four valves per cylinder are fitted in the guides, operated by two camshafts by means of hydraulic tappets.

The valve guides are an interference fit in the cylinder head seats. A special reamer is used to produce the correct inner diameter after fitting.

The camshafts are fitted in the camshaft housings, without a tappet cover.

The gasket between cylinder head and cylinder block is the "double layer metallic" type 0.5 mm thick and the head does not require retightening throughout the engine life.

1. Camshaft housing

2. Cylinder head

3. Gasket

4. Base for phase transformer

1.9 JTD 8v

CONSTRUCTION SPECIFICATIONS

The cylinder head is a one-piece cylinder head in aluminium alloy and silicone.

The two valves per cylinder, which are parallel and vertical, are fitted in their own valve guides and controlled by a single camshaft whose cams act on mechanical tappets.

The valve guides are an interference fit in the cylinder head seats. A special reamer is used to produce the correct inner diameter after fitting.

Unlike cylinder heads with prechamber, the entire combustion process takes place in the combustion chamber on the piston.

The gasket between cylinder head and crankcase is metal and the head does not require retightening throughout the life of the engine.

The nylon tappet cover incorporates the oil vapour separate and closes off the cylinder head at the top and an intervening gasket assures a seal.

1.9 JTD 16v

CONSTRUCTION SPECIFICATIONS

The cylinder head is a one-piece cylinder head in aluminium alloy and silicone.

Two, ductile cast iron, overhead camshafts in a camshaft housing; they are operated by a belt and gears.

The four valves per cylinder, parallel and vertical, are positioned in the valve guides and are controlled by rocker arms operated by the camshaft cams and kept in contact with the valves through hydraulic tappets.

The valve guides are an interference fit in the cylinder head seats. A special reamer is used to produce the correct inner diameter after fitting.

Unlike cylinder heads with prechamber, the entire combustion process takes place in the combustion chamber on the piston.

The gasket between cylinder head and crankcase is metal and the head does not require retightening throughout the life of the engine.

1.4 16v TJet

CONSTRUCTION SPECIFICATIONS

The cylinder head is a one-piece cylinder head in aluminium alloy.

The four valves per cylinder are fitted in the guides, operated by two camshafts by means of hydraulic tappets.

The valve guides are an interference fit in the cylinder head seats. A special reamer is used to produce the correct inner diameter after fitting.

The camshafts are fitted in the camshaft housings, without a tappet cover.

The gasket between cylinder head and cylinder block is the "multi-layer metallic" type 0.72 mm thick and the head does not require retightening throughout the engine life.

1. Camshaft housing

2. Cylinder head

3. Gasket