Opel Corsa B, Combo, Tigra

Since 1993-2000 of release

Repair and car operation

Check компрессионного pressure in cylinders and parametres of impellent oil

Check компрессионного pressure in cylinders

Results of check компрессионного pressure in cylinders allow to define the general condition of components of the top part of the engine (pistons, piston rings, valves, linings of a head of cylinders, etc.) and qualitatively to estimate degree of their deterioration. That is especially important, the analysis of the information received as a result of check allows to narrow a spectrum of the possible reasons of falling of a compression in cylinders, precisely enough having adhered refusal to infringements of functioning of quite concrete components, whether it be piston rings, valves, their saddles or a head lining.

The engine should be heated-up to normal working temperature, and the storage battery is completely charged.

PERFORMANCE ORDER

Begin with procleaning of candle niches (blow their compressed air as which source in this case the ordinary bicycle pump perfectly will approach). The Primary goal is prevention of hit of dust in cylinders during performance of measurements. On engines DOHC of 1.0 and 1.2 l separate both sockets of the block of engine management and remove the ignition module. Thus ignition should be switched off. On engines DOHC of 1.4 and 1.6 l uncover ВВ wires. For this purpose uncover маслозаливной mouths and then again establish it. Separate sockets of spark plugs. For engines OHC of 1.2 and 1.4 l are used special nippers (for example, HAZET 1849). At separation of sockets it is necessary to undertake only sockets, but at all for conducting. On engines DOHC of 1.4 and 1.6 l sockets of spark plugs are separated by means of the special tool which is on one of sockets. Turn out candles a special candle key. On engine C14NZ separate a multicontact socket of the coil of ignition. Multicontact socket of the coil of ignition on engine C14NZ On all engines, except C14NZ X10XE and X12XE separate a multicontact socket of the module of ignition DIS. On petrol engines 1.2, 1.4 and 1.6 l take the relay of the fuel pump (marksman). Thereby the situation at which during engine start injected fuel in not burnt down kind can arrive in каталитический the converter is excluded. The relay is in salon behind facing of rack A, on the right below. On diesel engines disconnect electroconducting from the switch on ТНВД. Extraction of the relay of the fuel pump will allow to disconnect the power supply system of the petrol engine Turn the engine a starter to remove the rests of an air-fuel mix and soot. Preliminary translate a transmission in neutral position and cock a lay brake. Thus do not bend down over the engine not to be traumatised from emission of particles of soot. Establish компрессиометр in a candle aperture of the first cylinder, - it is preferable to use to connection компрессиометра a nozzle carving, instead of clamping type. Do not forget to open during check against the stop throttle заслонку. In diesel engines compression degree it is ready above, than in petrol, therefore for check компрессионного pressure it is required special компрессиометр with a range of measurement not less than 40 атм. Компрессиометр by the transitive nozzle it is rolled in a candle aperture накаливания. Ask the assistant to press a pedal of gas and to keep it in the course of check carrying out. Scroll a starter during 4 with or so much, how many it is necessary that on компрессиометре there were no pressure jumps. On the serviceable engine pressure should accrue quickly enough. Low pressure upon the first step, accompanied by its gradual increase on the subsequent, speaks about deterioration of piston rings. If at further проворачивании a shaft pressure does not rise, it can be regarded as the certificate of leaks of valves or infringement of tightness of a lining of a head of cylinders (the probability of presence of cracks in a head is not excluded also). The congestion of adjournment on working facets of plates of valves also can lead to decrease компрессионного pressure. Write down the maximum indication компрессиометра. Repeat procedure for the remained cylinders of the engine. Compare results to standard requirements (Engines see the Head). The number of turns of a cranked shaft at check should be not less than 300 rpm for petrol engines and not less than 200 rpm for diesel. At excessively low results of measurement fill in in each of cylinders through a candle aperture a little impellent oil (two-three teaspoons) and repeat check. If oil addition leads to pressure increase, it speaks about deterioration of piston rings. If the compression does not increase, the reason of its decrease are leaks of valves or infringement of tightness of a lining of a head. Leaks of valves can be connected with a burn-out of their saddles, either deformation/burn-out or mechanical damages of working facets. If pressure of compression is equally underestimated in two next cylinders with high degree of probability it is possible to speak about infringement of integrity of a lining of a head within its crosspiece between the given cylinders. Presence of a cooling liquid at impellent oil will confirm the given assumption. If pressure in one of cylinders approximately on 20 % more low, than in other and it is accompanied by infringement of stability of turns of idling, it is necessary to estimate degree of deterioration of cams of a drive of corresponding valves on a camshaft. Unusual overestimate компрессионного usually is a consequence of pressure excessive нагарообразования in combustion chambers. In this case the head of cylinders should be removed for the purpose of carrying out декарбонизации. At excessively low results of measurements, and also in case of infringement of uniformity of distribution of pressure between cylinders it will be useful to hold testing of the engine for leaks in the conditions of a car-care centre workshop. Such check will allow to define precisely a source of leak and to estimate degree of its gravity. After the termination of measurements establish all candles of ignition/nakalivanija and connect to them electroconducting. Establish all acting in film components in an order, the return to an order of their removal.

Block check on leaks

During the given check are defined speed of an exit from cylinders закачанного in them of the compressed air and it is direct places of leaks. The given check is alternative to compression check. Moreover, from many points of view, it is much more effective as visually to reveal a source of leak easier, than to comprehend results of measurement of a compression.

The equipment necessary for check on leaks, is not among popular, therefore performance of the given check should be entrusted experts of the service centre.

Measurement of temperature of impellent oil

For performance of various adjusting works the great value has definition of temperature of impellent oil. Temperature it is necessary to measure on distance of 1 sm over the pallet картера.

PERFORMANCE ORDER

For temperature measurement insert in directing щупа level of impellent oil a measuring probe, rest it against the pallet картера, and then lift on 1 see To exclude засасывание air through directing щупа, condense its aperture with a rubber stopper. Temperature of oil +80 hailstones. And above corresponds to working temperature of the engine.

At an overload of the engine the oil temperature can reach value +150 hailstones.

Check of pressure of oil

PERFORMANCE ORDER

Warm up to working temperature. Switch off ignition and disconnect electroconducting from Д/В pressure of impellent oil. Turn out Д/В pressure of oil. It is located: - On petrol engines DOHC of 1.0 and 1.2 l – from above heads of cylinders, over the water pump; - On petrol engines 1.2, 1.4 and 1.6 l – sideways from the oil pump, over gauge CKP - On diesel engines – on the face party of the engine, near to the oil filter. Д/В pressure of oil of petrol engines Screw in carving aperture Д/В of pressure of oil a manometre. HUNDRED firms Opel apply for this purpose hose КМ-135 with manometre КМ-498-В. Start the engine and allow to it to work on single turns. Consider indications of a manometre and compare them to requirements of Specifications in the Head Engines. If necessary check up an oil contour on leaks. Turn out a manometre, establish new Д/В pressure of impellent oil with a new copper lining and tighten it with effort of 30 Nanometers. Connect to the gauge electroconducting.