The cylinder block of the 1.4 and 1.6 liter engines is made of aluminum with plug-in cast iron cylinder liners. In other engines, the cylinder block is made of gray cast iron. The cylinder head is made of light alloy and is bolted to the cylinder block. Steel guides and valve seats are pressed into the cylinder head. An oil pan is attached to the bottom of the engine block, into which oil flows, which is necessary for lubricating and cooling the engine.
Gasoline engines use a cross-flow arrangement in which the air-fuel mixture enters the engine cylinders from one side of the engine and the exhaust gases are removed from the other side of the engine. With this engine design, the filling of the cylinders with an air-fuel mixture and the removal of combustion products are significantly improved.
ENGINE 1.4-I
This engine has two intake and two exhaust valves per cylinder. The valves are driven by two camshafts. One camshaft controls the intake valves and the other camshaft controls the exhaust. The camshaft that controls the exhaust valves is driven by a toothed belt from the crankshaft pulley. The intake camshaft is driven by a toothed belt from the exhaust camshaft.
ENGINE 1.6-I
The camshaft is mounted in the cylinder head and is driven by a toothed belt from the crankshaft pulley. The vertically mounted intake and exhaust valves are controlled by camshaft cams via hydraulic tappets.
ENGINE 1.8-I
This engine has five valves for each cylinder - three intake and two exhaust. The valves are driven by two camshafts. One camshaft controls the intake valves and the other camshaft controls the exhaust. The camshaft that controls the exhaust valves is driven by a toothed belt from the crankshaft pulley.
The camshaft that controls the intake valves is driven by a chain from the camshaft that controls the exhaust valves. Increasing the number of valves per cylinder significantly improves the filling of the cylinder with air-fuel mixture and the removal of combustion products.
ENGINE 2,3-I (VR5)
In the VR5 engine, five cylinders are located in two planes at an angle of 15°in one cylinder block. Two camshafts mounted in the cylinder head are driven by a chain. Each cylinder has one intake and one exhaust valve.
ALL ENGINES
Valve clearances are adjusted automatically using hydraulic tappets, manual adjustment is not required.
An oil pump is used to supply oil to the rubbing surfaces of the engine. On engines of 1.6 and 1.8 liters, the oil pump is driven by a chain from the crankshaft. On 1.4-I engines, the oil pump is installed in the front cover of the crankshaft and is driven directly by the crankshaft. Under pressure, oil is supplied to the channels and bearings of the crankshaft and camshaft.
The water pump is mounted on the side of the engine block and is driven by a toothed belt, and on five-cylinder engines by a V-belt. The V-belt or V-ribbed auxiliary belt also drives the alternator, power steering pump and A/C compressor. Keep in mind that the engine cooling system should be filled year round with a mixture of antifreeze and water with a low lime content.
The preparation and ignition of the air-fuel mixture in the engine cylinders is carried out by the engine control system, which does not require adjustments. The ignition timing and idle speed are controlled by the engine management system. During maintenance, it is necessary to replace the spark plugs and the air filter element.
Warning: The radiator fan may come on after the engine is turned off and the ignition is turned off, so be careful when working on a hot engine. To prevent the radiator fan from turning on, disconnect the electrical connector from the radiator fan motor.
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