The timing belt drives the camshaft, high-pressure fuel pump (HPFP) and water pump. The tappets are located between the camshaft and the valves, and the valve clearances are adjusted using special washers. The camshaft rests on three bearings made directly in the cylinder head.
The crankshaft rotates in 5 main bearings of the conventional type (with replaceable liners). The axial movement of the crankshaft is controlled by thrust washers located on both sides of main bearing No. 2.
The pistons are nearly identical in weight and feature floating piston pins that are held in place by retaining rings.
The oil pump is chain driven from the front of the crankshaft. Some models with a 1.9L engine are equipped with an oil cooler.
Latest models
The XUD engine has undergone some changes. The most significant of these was the introduction of a turbocharged version. The design of a turbo engine is essentially little different from that of a conventional engine, but it has improved crankshaft, pistons and connecting rods.
Article based on material from the website Peugeotbook.ru