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Jeep Grand Cherokee1993-1999 of releaseRepair and car operation |
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Jeep Grand Cherokee + Cars of mark Jeep Grand Cherokee + Options and routine maintenance + Рядный the six-cylinder engine + Engine V8 - Procedure of the general and engine major repairs The general information Engine major repairs - the general information Check компрессионного pressure in cylinders The diagnostic checks made by means of the vacuum gauge Methods of removal of the engine and necessary safety measures Removal and engine installation Variants of restoration of the engine Order of dismantling of the engine Dismantling of a head of cylinders Cleaning and check of a condition of a head of cylinders Service of valves Assemblage of a head of cylinders Removal of shatunno-piston assemblages Removal of a cranked shaft Cleaning of the block of the engine Check of a condition of the block of the engine Хонингование cylinders Check of a condition of shatunno-piston assemblages Check of a condition of a cranked shaft Check of a condition radical and шатунных bearings Assembly order of the engine after end of its major repairs Installation of a cranked shaft and check of backlashes of radical bearings Installation of piston rings Installation of shatunno-piston assemblages and check of backlashes in шатунных bearings The first start of the engine after major repairs + Systems of cooling, heating and air conditioning + The power supply system and release of the fulfilled gases + System of an electric equipment of the engine + Systems of decrease in toxicity of the fulfilled gases and engine management + Manual box of a gear change + Automatic transmission + Distributing box + Coupling and трансмиссионная a line + Brake system + Suspension bracket and steering + Body + System of an onboard electric equipment + Controls and operation receptions |
The diagnostic checks made by means of the vacuum gauge Measurement of depth of depression gives the valuable information on a condition of internal components of the engine. There is a possibility to estimate degree of deterioration of piston rings and walls of cylinders, to reveal leaks of a head of cylinders and the inlet pipeline, infringement of passableness of system of release of the fulfilled gases, jamming or a burn-out of valves, easing клапанных springs, infringement of installation of a corner of an advancing of ignition or distribution of operation of valves, and other problems with ignition. Unfortunately results of vacuum testing are easily wrong for interpreting, therefore it always should be made together with other checks, the general which analysis of results allows to draw unequivocal conclusions. For an adequate situation assessment are important both absolute indications of the vacuum gauge, and relative size of a deviation of an arrow of the device. The majority of vacuum gauges measure depth of depression in mm (inches) of a mercury column (more low all results and indicators will be given in metric system). All given below the reference become on the basis of the assumption of check carrying out at zero height concerning a sea level. Lifting of a point of carrying out of check (or decrease in atmospheric pressure) conducts to corresponding decrease in instrument readings. For a binding we will notice that the increase in height of a point of carrying out of tests at each metre after a mark in 610 m gives result understating on 83 mm hg Connect the vacuum gauge directly to the entrance union of the inlet pipeline - not to port of the case of a throttle. Track, that no hoses during check remained disconnected is will lead to infringement of reliability of results. Before starting check allow to the engine to be warmed up completely. Block (wedges) of a wheel and cock a lay brake. Having translated transmission in position Р, start the engine and leave its working on turns of normal idling.
Consider vacuum gauge indications; for the inquiry, on the average, the serviceable engine should create depression by depth from 431 to 559 mm hg At stable position of an arrow of the device. Results of check can are interpreted as follows:
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