About Section
1. This Part of Section 2 deals with repair operations performed in the engine compartment. The procedures for removing, installing and overhauling the engine are described in Section 2C.
2. All procedures are described with the engine still in the vehicle. If the engine has been removed for overhaul, ignore the additional information that precedes each step.
Engine - general description
3. The described models are equipped with water-cooled in-line 4-cylinder engines with double overhead camshafts.
4. The crankshaft rotates in the cylinder block in five main bearings. Main bearing No. 3 is equipped with thrust washers that regulate the axial clearance of the crankshaft.
5. The connecting rods are attached to the crankshaft by means of connecting rod bearings, and to the pistons by piston pins. The pistons are made of aluminum alloy and are equipped with three piston rings - two compression and one oil scraper.
6. The camshafts are located on top of the cylinder head and are driven from the crankshaft by a timing belt. The same belt drives the water pump. The camshaft cams push hydraulic tappets, which in turn actuate the valves. Tappets automatically adjust valve clearances.
7. Lubrication is pumped into the engine by an oil pump mounted on the front end of the crankshaft. Oil is sucked from the sump through a mesh oil receiver, then driven through a cartridge-type filter installed on the engine. It then flows into the oil line galleries of the main bearing caps and cylinder block/crankcase, from where it is distributed over the crankshaft (main bearings) and distributors. The connecting rod bearings are supplied with oil through internal holes in the crankshaft, and oil is supplied to the camshaft bearings under pressure. The camshaft cams and valves are lubricated by draining oil, just like all other engine components.
8. On engines since 1998, a crankshaft balancer block is installed that dampens vibrations that occur during piston movement / crankshaft rotation. The block includes two shafts and is bolted to the base of the cylinder block under cylinder No. 2. The gears of the balancer shafts are coupled to each other, the gear of the first shaft is driven from the crankshaft through the gear that forms the third counterweight of the crankshaft. The crankshaft gear has twice as many teeth as the balancer block gears and thus causes the balancer shafts to rotate twice as fast as the crankshaft. The first shaft of the balancer block, unlike the second, rotates in the opposite direction to the crankshaft.
9. The models described use a semi-closed crankcase ventilation system. The crankcase gases are pulled out from under the valve cover and fed through a hose into the intake manifold.
Repair operations performed without removing the engine
10. Without removing the engine, the following actions can be performed:
- A) Removal and installation of a head of the block of cylinders.
- b) Removal and installation of a toothed drive belt and its sprockets.
- V) Camshaft seal replacement.
- G) Removal and installation of camshafts and pushers.
- d) Removal and installation of the pallet.
- e) Removal and installation of connecting rods and pistons *.
- and) Removal and installation of the oil pump.
- h) Replacing the crankshaft balancer block.
- And) Replacing crankshaft seals.
- To) Replacement of engine mounts.
- l) Removal and installation of a flywheel/drive disk.
* Although the operation marked with an asterisk can theoretically be performed in the engine compartment after removing the pan, it is not recommended to do so. Such procedures are much easier and safer (in terms of the risk of damaging components) be performed on a removed engine. For this reason, the procedure is described in Section 2C.
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