General description (Opel Omega A)

Engine: 4-cylinder with overhead camshaft, and is designed on the basis of a series of gasoline engines. The head and cylinder block are cast iron. The crankshaft rotates in five main bearings. The main and connecting rod journals are reinforced to withstand the high loads associated with high compression.

The camshaft is driven by a chain from the crankshaft sprocket. The high-pressure fuel pump is also driven from it. The chain tension is adjusted by a special tensioner.

The inlet and outlet manifolds are located on one side of the cylinder head. In Turbo models, a turbo generator is installed between them.

Lubrication is provided by a pump driven directly from the crankshaft. Oil is pumped from the sump and passes through a series filter before entering the main oil galleries in the block and crankshaft. The lubrication system has two pressure control valves, one in the pump and one in the cylinder head, which open when the oil pressure exceeds a certain value. A bypass valve in the oil filter housing ensures a continuous supply of oil (unfiltered) in case of clogging of the filter element.

Crankcase ventilation is achieved by two hoses. One connects the camshaft fastener to the dipstick tube, and the other runs from the filter in the camshaft cover to the air filter on the intake manifold side.

The cooling system pump is located at the front of the engine and is driven by a V-belt, which also drives the generator. The cooling system fan is connected to the cooling pump shaft.

(The article was published on the website: opelbook.ru)