Audi 100/A6

1990-1997 of release

Repair and car operation

3.1.3.3. A head of cylinders

THE GENERAL DATA

Head of cylinders remove only at the cold engine (at premise temperature). A final branch pipe do not disconnect. The head of cylinders can act in film without engine removal. The description concerns the left head of cylinders. The right head of cylinders acts in film similarly.

Defects of a sealing lining of a head of cylinders are defined to various signs.

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The prevention

The inhaling of bolts of a head of cylinders is necessary for carrying out very carefully. Before an inhaling динамометрический the key should be checked up on accuracy. Bolts of a head of cylinders should be tightened on the cold engine.

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Removal

PERFORMANCE ORDER

1. Unhook a drainage casing in the bottom part of a motor compartment between a forward wall and a windscreen and remove it. 2. Disconnect a weight wire (–) the accumulator. The prevention Before a detachment it is necessary to read instructions from subsection 8.1.3.2. With a central air the accumulator is in cars under a back seat. 3. Remove поликлиновый a belt. 4. The car lift. 5. Remove the bottom casing of a motor compartment. 6. A gear belt ослабьте also remove from cogwheels of camshafts. Гаситель крутильных fluctuations do not remove. 7. An exhaust pipe turn on from a final branch pipe (arrows the arrangement of elements of fastening is shown). 8. Turn away the pipeline of gas at the mechanical valve of system рециркуляции the fulfilled gases (valve AGR). The connection place is at the left branch pipe near to the oxygen gauge. 9. Merge cooling liquid. 10. Remove an air hose between a measuring instrument of the expense of air and the inlet pipeline. 11. Turn away ventilation system картера at the left and to the right of a head of cylinders. 12. Turn away a tube of a supply and fuel tap at the left and to the right of the ring pipeline from below at an inlet collector. Under a joining place put a rag, nuts release slowly to dump pressure. Tubes muffle corresponding stoppers. 13. Unfasten a cover of the muffler of noise. For this purpose insert a wrench between an inlet collector and a cover and shift it upwards. 14. Turn out both bolts under a cover. 15. A cover of the muffler of noise press downwards, pull to a branch pipe throttle заслонки and put forward upwards. 16. Disconnect following vacuum hoses. For simplification of assemblage hoses preliminary mark by means of labels.  – A vacuum hose to the left of a cover of the muffler of noise;  – A hose of the left connecting branch pipe of system of ventilation картера. 17. Take out the muffler of noise. 18. Mark and remove following vacuum pipelines.  – The vacuum pipeline of the amplifier of brake system on the right at an inlet collector and at the vacuum pump on the right head of cylinders;  – A vacuum hose from above system AGR boxes. The box with mechanical перепускным the valve is at the left below at an inlet collector;  – The vacuum pipeline of a box of system GRA (a black box from plastic). System GRA carries out switching the valve of an inlet collector, the box is near to system AGR box;  – The vacuum pipeline of the clock valve of the filter with the activated coal at throttle заслонки;  – Vacuum pipelines at the valve of switching of an inlet collector (blue) and at the electric valve systems AGR (brown). Both valves are under a measuring instrument of the expense of air. 19. Turn on by means of a key with external шестигранником SW 5 at the left a cover of wires клапанных atomizers. 20. Unfasten draught of gas, remove and put aside. 21. Remove or disconnect following wires. For simplification of assemblage of a wire mark by means of labels.  – All tips of spark plugs;  – All tips клапанных atomizers;  – The tip of the valve of stabilisation of idling on the right below at an inlet collector;  – The tip of the gauge of position throttle заслонки below at a branch pipe throttle заслонки;  – The tip of the gauge of pressure of oil and the hydraulic switch below at the left head of cylinders;  – The tip of the oxygen gauge and the oxygen gauge of system of heating from an end face of the block of cylinders, near to the left head of cylinders. The prevention Tape collar of wires release, and if necessary cut off. A collar do not remove, that at engine assemblage it would be possible to establish a new tape collar on the same place. 22. Turn away the mechanical valve of system AGR from an inlet collector. 23. Turn on the holder of the hydraulic pipeline and wires of weight at an inlet collector on the right.

ENGINES WITH TWO VALVES ON THE CYLINDER (TO 174 L. С)

Head of cylinders – the 6-cylinder petrol engine (2 valves on the cylinder, to 174 h.p.)

1. A bolt, 20 Nanometers 2. An inlet collector 3. A bolt, 10 Nanometers 4. A cover 5. A bolt, 10 Nanometers 6. A bolt of a head of cylinders 7. The gauge of pressure of oil, 25 Nanometers 8. The hydraulic switch, 25 Nanometers 9. A hollow bolt, 25 Nanometers

10. A bolt, 10 Nanometers 11. The case of the gauge of the Hall 12. A head of cylinders The left and right heads of cylinders the interchangeable. Therefore before installation the head should be supplied with a corresponding cover. 13. A sealing lining of a head of cylinders

PERFORMANCE ORDER

1. An inlet collector turn on and take out (a fixture arrangement is shown by arrows). 2. Apertures close one pure rag that the dirt could not get inside. 3. Turn away a tube of a cooling liquid in the bottom of a head of cylinders. 4. Turn away a tube of selection WITH from a forward exhaust pipe and from an arm. 5. Remove the oxygen gauge. 6. Turn away the protective thermal screen from a final branch pipe. 7. Turn on by means of a key with external шестигранником SW 5 cover of a head of cylinders and remove together with the index of level of oil. 8. Remove a sealing lining of a cover of a head of cylinders. 9. Release bolts of a head of cylinders in an order, return their numbering, from 8 to 1 at first on 1/2 turns, then turn out.

ENGINES WITH FIVE VALVES ON THE CYLINDER (WITH WORKING VOLUME 2,8 L (30 VALVES), 193 L. С)

PERFORMANCE ORDER

1. Remove the tip of adjustment of a camshaft and клапанных atomizers (the arrangement of elements of fastening is shown by arrows). 2. Cut a coupling collar of wires at a cover of valves, unfasten a clip of wires at an injection highway, remove ventilation system картера from a cover of a head of cylinders. 3. Turn out four bolts of a fuel collector at an inlet collector. 4. Unfasten pipelines of a supply and tap of fuel from the holder. 5. Pull out and put aside a fuel collector with клапанными atomizers. Klapannye atomizers close a pure rag. 6. Turn away the ignition coil together with an arm (4 bolts). 7. Enclose under a gas pedal wooden колодку in height about 90 mm. Turn away box GRA (a regulator of speed), take out the ball hinge at a drive throttle заслонки. 8. Turn away an inlet collector. 9. Turn away the bottom left casing of a gear belt. 10. Turn away two bolts of a pipe of a cooling liquid at a head of cylinders. 11. Check up, whether all wires and the hoses going to a head of cylinders, are removed. 12. Release bolts of a head of cylinders in an order, return their numbering, from 8 to 1 at first on 1/2 turns, then turn out. 13. A head of cylinders remove and put on 2 wooden бруска. 14. Remove a sealing lining of a head of cylinders.

Installation

PERFORMANCE ORDER

1. Before installation a head of cylinders and the block of cylinders clear of the consolidation rests corresponding шабером. Thus pay attention to that the dirt has not got to apertures of the block of cylinders. Apertures close rags. 2. Check up, whether there is no oil in apertures under bolts of a head of cylinders, if is to remove. Check up a head of cylinders by means of a steel ruler on a deflection. A deflection to check up by means of a steel ruler and probeа in various places of a head of cylinders. As much as possible admissible roughnesses should not exceed 0,1 mm. The prevention If contact surfaces of a head of cylinders to are processed, the admissible height дообработанной heads should not be less than some minimum height. The minimum height дообработанной heads of cylinders of 132,75 mm (for the engine with working volume 2,8 l and 30 valves – 139,25 mm). 3. Check up, whether are free from aperture oil under bolts of a head of cylinders, if necessary oil remove. If there is possibility to blow no aperture the compressed air it is necessary to take a small screw-driver and well absorbing rag and with their help to clear apertures of oil. 4. A sealing lining of a head of cylinders necessarily replace. The inscription on a lining should be turned towards a head of cylinders. A lining stack dry and on a dry surface so that apertures in the block of cylinders were not closed. 5. For a centering of a sealing lining and a head of cylinders there are directing plugs. 6. Reserve correct places for directing plugs. The prevention If the new head of cylinders is established, it is necessary to establish in advance from a forward end face заглушку. It is necessary that established as the spare part a head of cylinders could be established both on the right, and at the left. 7. External edge заглушки grease with hermetic AMV 1880002. Заглушку by means of core VW-295 it is necessary заглубить so that its external edge was заподлицо with an adjusting facet of a head of cylinders (in drawing the arrangement заглушки is shown). 8. Cautiously establish a head with the help тали. 9. Insert bolts of a head of cylinders with washers and wrap them by hand. Bolts of a head of cylinders necessarily replace with the new.

ENGINES WITH TWO VALVES ON THE CYLINDER (TO 174 L. С)

PERFORMANCE ORDER

1. Bolts of a head of cylinders are tightened in two steps. In each reception bolts tighten in sequence from 1 to 8. Reception 1: with the help динамометрического a key the moment of 60 Nanometers. Reception 2: without interrupting a tightening, tighten in an inhaling direction on 1/2 turns (180 degrees) by means of the blocked key. It is supposed to carry out this reception as 2 inhalings on 90 degrees. 2. At an inhaling of bolts of a head of cylinders estimate a key angle of rotation. The key handle arrange along a head of cylinders and for one course turn it before position, perpendicular head axes (1/4 turns make 90 degrees). Then a key turn further while the key handle will not settle down again along a head of cylinders. The prevention The subsequent pulling up of bolts of a head of cylinders on the heated-up engine is not required and is inadmissible. At installation on replacement of a head of cylinders with the established camshaft contacting surfaces тарельчатых pushers and cams after installation of a head of cylinders grease. 3. Establish a gear belt. 4. Cautiously by means of a small screw-driver grease with greasing "Silmate AMV 17400401" four edges – an arrow – on a contact surface of a head of cylinders. The prevention Aperture for oil – And – thus do not close. 5. Contact surfaces of a sealing lining of a cover of a head of cylinders before installation easily grease with a protection frame from sliding on silicone basis D00700001. 6. Establish a cover of a head of cylinders together with the index of level of oil and in regular intervals tighten bolts the moment of 10 Nanometers.

ENGINES WITH FIVE VALVES ON THE CYLINDER (WITH WORKING VOLUME 2,8 L (30 VALVES), 193 L. С)

PERFORMANCE ORDER

1. Bolts of a head of cylinders are tightened in two steps. In each reception bolts tighten in sequence from 1 to 8. Reception 1: with the help динамометрического a key the moment of 60 Nanometers. Reception 2: without interrupting a tightening, tighten in an inhaling direction on 1/2 turns (180 degrees) by means of the blocked key. It is supposed to carry out this reception as 2 inhalings on 90 degrees. The prevention The subsequent pulling up of bolts of a head of cylinders on the heated-up engine is inadmissible. 2. Tighten парубок a cooling liquid and a casing of a gear belt. 3. An exhaust pipe connect to a final branch pipe. 4. Tighten a branch pipe of a cooling liquid behind a head of cylinders. 5. Tighten a tube of selection WITH. 6. Establish the oxygen gauge. 7. Clean a rag from inlet apertures. 8. An inlet collector establish with a new sealing lining. Bolts tighten in the specified sequence in four receptions. The arrow shows a direction of movement of the car. Reception of 1: 5 Nanometers; Reception of 2: 10 Nanometers; Reception of 3: 20 Nanometers; Reception of 4: 20 Nanometers. The prevention At the engine with working volume 2,8 l and 30 valves an inlet collector приворачивайте only the moment of 10 Nanometers. 9. Tighten by means of a key with external шестигранником SW 5 at the left a cover of wires клапанных atomizers. 10. Insert, establish or fix according to the marks put on labels following wires:  – All tips of spark plugs;  – All tips клапанных atomizers;  – The tip of the valve of stabilisation of idling on the right below at an inlet collector;  – The tip of the gauge of position throttle заслонки below at a branch pipe throttle заслонки;  – The tip of the gauge and the switch of pressure of oil below at the left head of cylinders;  – The tip of the gauge of the Hall below at the left head of cylinders;  – The tip of the oxygen gauge and a heater of the oxygen gauge from an end face of the block of cylinders, near to the left head of cylinders. 11. Tighten the holder of the hydraulic pipeline and wires of weight at an inlet collector on the right. 12. Tighten the mechanical valve of system AGR to an inlet collector. 13. Establish draught of gas. 14. Tighten at the left a cover of wires клапанных atomizers. 15. Establish according to the marks put on labels following vacuum pipelines:  – The vacuum pipeline of the amplifier of brake system on the right at an inlet collector and at the vacuum pump on the right head of cylinders;  – A vacuum hose from above system AGR boxes. The box with mechanical перепускным the valve is at the left below at an inlet collector;  – The vacuum pipeline of a box of system GRA (a black box from plastic). System GRA carries out switching the valve of an inlet collector, the box is near to system AGR box;  – The vacuum pipeline of the clock valve of the filter with the activated coal at throttle заслонки;  – Vacuum pipelines at the valve of switching of an inlet collector (blue) and at the electric valve systems AGR (brown). Both valves are under a measuring instrument of the expense of air. 16. Establish at throttle заслонки and tighten the muffler of noise. Attach a cover of the muffler of noise. 17. Attach according to the marks put on labels following vacuum hoses:  – A vacuum hose to the left of a cover of the muffler of noise;  – A hose of the left connecting branch pipe of system of ventilation картера. 18. Establish an air hose between a measuring instrument of the expense of air and the inlet pipeline. 19. Tighten ventilation system картера at the left and to the right of a head of cylinders. 20. Tighten tubes of a supply and fuel tap. 21. Tighten to a final branch pipe the pipeline of a supply of gas to the mechanical valve of system рециркуляции the fulfilled gases (valve AGR). 22. Establish the bottom casing of a motor compartment. 23. Connect a weight wire (-) the accumulator. Enter an antijoy ride device code, and also program radio stations. The prevention The accumulator can be connected only at the switched off ignition, the block of management of injection system otherwise fails. 24. Fasten a drainage casing, and also establish a back seat. 25. Fill in cooling liquid. Cooling liquid always update. 26. Check up oil level in the engine. In case the sealing lining of a head of cylinders had defect, make oil replacement. 27. The engine warm up to normal working temperature, again check up level of a cooling liquid, and also check up places of connection of all hoses on tightness.

FEATURES OF THE RIGHT HEAD OF CYLINDERS (ONLY ENGINES CAPACITY OF 174 L. С)

PERFORMANCE ORDER

1. Remove the vacuum pump and заглушку. 2. Remove an intermediate flange. 3. Pull out the piston from a camshaft. 4. Ring sealing linings And, In, With and D replace. 5. The piston, an intermediate flange and the vacuum pump again establish and tighten the moment of 10 Nanometers.