Renault Megane, Scenic

Since 1996 of release

Repair and car operation

Procedures of removal and engine major repairs

In this Chapter procedures of removal of the engine/transmission and an engine partition are described.
All resulted instructions assume that the engine has been removed from the car. The information concerning engine repair in an impellent compartment, and also concerning removal and installation of external components of the engine is resulted in the Head Repair of the engine and in Section Dismantling of a head of the block of cylinders from this Part.

The general description of a partition of the engine

It is not always easy to define, whether the engine requires a partition since it depends on many factors.
The big run not necessarily means that the partition and on the contrary, small run does not eliminate requirement for it is necessary. A service regularity - the most important factor which should be taken into consideration. The engine in which regularly changed oil and the filter, and also carried out other demanded service, will smoothly serve many thousand kilometres. And on the contrary, badly served engine can demand a partition at very big run.
The excessive expense of oil says that piston rings are damaged, маслоотражательные caps of valves and-or their directing plugs (however, preliminary it is necessary to exclude possibility of presence of leaks). Execute compression check to define a plausible reason of the over-expenditure of greasing.
Check up pressure of oil, having established the measuring device into position the gauge of pressure of oil, and compare the received result to the data specified in Specifications. If this pressure low, are worn possibly out radical and шатунные bearings and-or the oil pump.
The capacity loss, unstable work of the engine, noise in the engine or in клапанном the mechanism and the high expense of fuel can mean also that the engine requires a partition, especially if all these factors are presented simultaneously. If the complete course of service has not eliminated a problem, a repoint of the worn out components - the unique decision.
The engine partition means restoration of all internal parts, replacement of pistons and piston rings. As a rule, loose leaves radical and шатунных bearings are established new; if it is necessary, коленвал can be replaced or переточен; besides, valves are served. At engine major repairs, a partition can be twisted and such components, as a starter and the generator.

At an engine partition it is necessary to replace hoses of system of cooling, the thermostat and the water pump. Carefully examine a radiator to be convinced that it is not hammered and does not proceed. Besides, it is recommended to replace the oil pump.

Before to start an engine partition, read the description of all procedures and prepare all necessary. If accurately to follow all instructions and to prepare necessary tools and the equipment, work will not cause special difficulties though can occupy a lot of time. Check up presence on sale of the necessary spare parts. The basic work can be executed usual tools, but for survey of parts and to define, whether they require replacement, exact measuring tools be required.

Before to solve, what repair procedures should be executed, it is necessary to disassemble completely the engine and to examine all components (especially the block of cylinders and коленвал). A condition of these components - a primary factor, whether on which define the partition of the engine is possible or it is necessary to replace it with the regenerative block. Do not buy spare parts and do not start repair of any components, yet will not make this decision.