Description and characteristics of gasoline engines Powerful and at the same time economical engines provide impressive driving performance of the Audi A4 in all its variants: sedan, Avant and all-wheel drive...
Workshop or self-repair? A modern engine is an expensive design, amateurs are unlikely to be able to repair any components and parts of such an engine. Repair and adjustment of the...
Dismantling and installation of engine covers The Audi A4 engine is, at least partially, covered with plastic parts. The top covers primarily have an optical function, in addition they protect the engine...
Cylinder compression check If you want to make sure that the engine is still in good mechanical condition, then you need to check the compression pressure in individual cylinders. During...
Hydraulic tappets — general information Due to the heating of the engine, the individual parts of the valve drive expand, so there must be some clearance between the camshaft and the poppets....
Checking hydraulic tappets 1. Start the engine and do not turn it off until the fan turns on to cool the radiator. After that, the temperature of the coolant should be approximately...
Camshaft adjustment Continuous adjustment of the intake camshaft is essential. This control in the 3.0l, 2.0l and FSI engines ensures that the valve opening times are adjusted...
V-ribbed belt — check and replacement The V-ribbed belt, equipped with longitudinal scars, has a greater width than the previous V-belts. This belt drives all the important components: the...
Toothed belt — design description The toothed belt is an important transmission part of the valve timing mechanism. The toothed belt is designed to drive the camshaft. The toothed belt sits...
Valve noise Valve noise that occurs when the engine is cold is not a cause for concern. On the contrary, if noises are observed when the engine is warmed up to operating...
Cylinder head gasket Loss of power, loss of coolant and oil, lack of compression in two adjacent cylinders, presence of coolant in the engine oil or oil in the coolant most likely...