Opel Corsa B, Combo, Tigra

Since 1993-2000 of release

Repair and car operation

Check of a condition of components of shatunno-piston group

All engines

PERFORMANCE ORDER

Preliminary shatunno-piston assemblages should be carefully cleared. Rings are necessary for removing from pistons. Piston rings are subject to replacement without fail. By means of the special adaptation, or several щупов лезвийного type remove rings from pistons, - try not to damage a wall of the last casually. Removal of piston rings with the help щупа лезвийного type (it is better to take advantage simultaneously of two-three щупами) Remember that rings are made of fragile metal and can break at strong разжимании, - be not wounded! Scratch out from the bottoms of pistons traces of coal adjournment. After removal of the basic layer of adjournment smooth out a surface manually a wire brush or a piece of a fine-grained emery paper. At all do not use for зачистки made of a soft material and pistons easily subject to erosion wire nozzles to an electrodrill! After зачистки put on the bottoms of pistons marks should differ clearly. By means of the special adaptation clean flutes under installation of rings on pistons. It is alternatively possible to take advantage for this purpose of a fragment of an old piston ring, however be careful, - do not scratch a bottom and walls of a flute and do not cut fingers. Procleaning of flutes under installation of piston rings by means of the special tool Having removed the basic adjournment, wash out шатунные assemblages by solvent and carefully dry them, whenever possible with application of compressed air. Check up passableness масловозвратных apertures in back walls of flutes under installation of piston rings, and also oil apertures in the bottom heads of rods. At using the compressed air do not forget to put on goggles! If walls of pistons and a mirror of cylinders are not damaged and excessively are not worn out, and the engine block was not pierced and not replaced, necessity for replacement of pistons also disappears. Normal deterioration of pistons is shown in the form of vertical traces of development on a persistent surface and a small weak point of landing top компрессионного rings in the flute. Do not forget that replacement of piston rings is made without fail, without dependence from their condition. Attentively examine each of pistons on presence of cracks in a skirt, round ledges under installation of piston fingers and around an arrangement of rings. Check up persistent surfaces of a skirt of the piston on presence of scratches, the bottom - on presence of through apertures and прогаров on edge. Presence of scratches on a skirt can be regarded as a sign of long overheats of the engine, or too early ignition of an air-fuel mix, - check up serviceability of functioning of system of cooling. Прогары along the edges of the bottom are the detonation certificate. In any case, the reason of the revealed infringement should be eliminated in order to avoid relapses. As the possible reasons of formation of the listed defects leaks of soaked up air, wrong configuration of an air-fuel mix, infringement of installation of a corner of an advancing of ignition, wrong functioning of systems of ignition and EGR can act also. Dot corrosion of pistons in the form of cavities speaks about hit in chambers of combustion and-or картер the engine of a cooling liquid. Besides, take care, that the reason of internal leaks has been eliminated. Estimate size of a lateral backlash of landing of piston rings in the flutes for what enclose a new ring outside in the flute on the piston and щупом лезвийного type measure a remaining backlash Repeat measurement in two-three points on flute perimetre. Watch to mixing компрессионные a ring, - top differs from the second. If the backlash size exceeds admissible value (Specifications in the Head Engines see), pistons are subject to replacement. Check of a backlash of landing of a piston ring in a flute Define size of a landing backlash of pistons in the cylinders for what measure diameters of the last (see the Section Cleaning and check of a condition of the block of cylinders) and subtract from them diameters of corresponding pistons. Measurement of diameter of the piston is made on a persistent surface of a skirt at an angle 90 hailstones. To an axis of a piston finger and on the set removal from the bottom. If the landing backlash of the piston in the cylinder exceeds admissible value (Specifications in the Head Engines see), it is necessary to give the block in проточку with a selection of new pistons and piston rings of repair diameter. Diameter of the piston is measured in a plane, a perpendicular axis of a piston finger … Estimate correctness of landing of pistons on rods, having tried повращать components in opposite directions. Presence a little appreciable люфта speaks about excessive deterioration of a joint. For situation correction it is necessary to deliver shatunno-piston assemblages in a car-care centre workshop where necessary regenerative repair and replacement of fingers will be made.

Petrol engines

On all petrol engines piston fingers are planted in the top heads of rods with a tightness and have floating landing in lugs of pistons in view of what performance of procedure of removal of pistons from rods (in case of occurrence of such necessity) also should be entrusted to experts of car-care centre. In parallel, rods can be checked up on presence of signs of a bend, twisting and other deformations with application of the special diagnostic equipment.

Needlessly it is not necessary to remove pistons from rods.

Diesel engines

PERFORMANCE ORDER

On diesel engines fingers have floating landing as well in rods and are fixed on pistons by means of lock rings. In case of need, having hooked a suitable screw-driver, remove lock rings and manually squeeze out a finger of assemblage. Mark the removed finger by means of an adhesive tape on an accessory to the shatunno-piston assemblage and clean in a reliable place. Lock rings at assemblage are subject to replacement without fail. Removal of a lock ring of a piston finger Survey the top head of a rod and a piston finger on presence of signs of deterioration, and задиров other mechanical damages. By a micrometer measure diameter of a finger, compare result of measurement to requirements of Specifications in the Head Engines, in case of need make replacement. If the finger or a rod is worn out, both details are subject to replacement. Rods (in the absence of mechanical damages) do not require replacement, - visually estimate their presence of signs of obvious deformations, in the presence of suspicions on a bend/twisting, address for the help to experts of car-care centre, or make replacement of defective components. Having estimated a condition of all components, prepare replaceable details. Replaceable pistons arrive on the market of spare parts complete with fingers and lock rings. Lock rings can be got separately. Make assemblage of pistons with rods so that the ledge on a rod from outside the bearing has appeared from outside a flywheel, the arrow should specify in the piston bottom in a direction of belt ГРМ of the engine The rod is established on the engine by a ledge () towards the disk flywheel/privodnogo, beaten out in the bottom of the piston of the marksman should specify in an opposite direction (towards drive ГРМ) Slightly grease piston fingers with pure impellent oil, and fix them pistons on the top heads of rods. Make sure of freedom поворачивания the piston concerning a rod on a finger axis. Establish new lock rings (locks upwards) and make sure of reliability of their landing in reception flutes.

All engines

PERFORMANCE ORDER

Check up rods on presence of cracks and other mechanical damages. Temporarily remove covers of the bottom heads, take loose leaves of old bearings, wipe beds in covers and heads and check up them on presence of agnails, задиров and roughnesses. Having finished check, enclose loose leaves into place, establish covers on the bottom heads of rods, and by hand tighten fixing bolts.

If the engine is under repair for the purpose of elimination of knock of fingers, replace шатунные assemblages.