Most of the work is performed based on the assumption that the engine is installed in the vehicle. Therefore, if this information is used during a complete engine overhaul when the engine is already removed, many of these jobs will not be performed.
Engine
The engine is a 4-cylinder, in-line, overhead camshaft engine, mounted transversely in the front of the vehicle.
The cylinder block is cast from cast iron. The E7J engine uses replaceable wet liners, and the K7M engine uses conventional dry liners, which are drilled directly in the cylinder block on five main bearings. The upper central main bearing has thrust washers that regulate the axial clearance of the crankshaft.
The connecting rods are fixed to the crankshaft by means of connecting rod bearings with liners, and on the pistons - by piston pins, which are fixedly seated in the connecting rods. The pistons are made of aluminum alloy - and are equipped with three rings, two compression and one oil scraper.
The camshaft rotates in five bearings drilled directly into the cylinder head and is driven from the crankshaft by a toothed belt, which also drives the water pump. The camshaft operates the valves via rocker arms mounted on a shaft attached to the top of the cylinder head.
Fully closed crankcase ventilation system.
Lubrication is supplied under pressure from an oil pump, which is driven by a chain from the crankshaft.
Repair procedures performed without removing the engine from the vehicle
- a) Removing and installing the cylinder head.
- b) Removing and installing the toothed drive belt and toothed wheels.
- c) Replacing the camshaft oil seal.
- d) Removing and installing the camshaft.
- e) Removal and installation of the stamped steel oil pan.
- f) Removal and installation of connecting rods, pistons and cylinder liners - stamped steel oil pan.*
- g) Removal and installation of the oil pump - stamped steel oil pan.
- h) Replacing the crankshaft oil seal.
- i) Replacement of engine support elements.
Note: Although the actions marked with an asterisk can be performed by the engine in a car (after removing the pallet), however, it is better to do this with the engine removed. On engines with an aluminum sump, the engine/transmission must first be removed from the vehicle, and only then the oil pan and remaining components can be removed.
Material is located on the source website: renaultbook.ru