7.2. General information
This part of the head included the general methods of dismantling of a head of the block of cylinders and other knots of the engine.
Information concerns the sequence of preparation for repair and the step-by-step description of operations of removal and installation of components of the engine, and their check.
It is not always easy to define as where in the engine demands repair: too many factors should be taken into account. The big run of the engine is not always a prerequisite to repair and vice versa, the small run does not guarantee lack of need under repair.
The raised consumption of oil testifies to need to pay attention to a condition of piston rings, oil scraper caps and guides of valves. At making decision on repair of the specified knots certify in lack of a leak of oil. Measurement of a compression in engine cylinders can give additional information on volumes of repair.
Check oil pressure size by means of the manometer installed instead of the oil pressure sensor. The lowered size of pressure of oil testifies to wear of bearings or damage of the oil pump.
Falling of power, uneven operation of the engine, blows and mechanical noise, the increased noise of the valvate mechanism and high fuel consumption, as a rule, testifies to need of repair, especially, if all these troubles arose at the same time.
At capital repairs of the engine replacement of pistons and piston rings is made, and cylinders are chiseled. Also new radical and conrod bearings, and in case of need are installed, necks of a bent shaft pereshlifovyvatsya and established conrod and radical bearings of the repair sizes. Pay special attention to a condition of the oil pump and if there are doubts concerning its reliability, replace it. Cooling system hoses, the thermostat and the water pump are subject to obligatory replacement.
Repair of the engine comes easy if to perform all works accurately and to have necessary tools and the equipment.