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8-1-obshhie-svedeniya.html
8.1. The general dataThe release system serves for tap of the fulfilled gases in atmosphere, prevents their hit even in a minimum quantity in salon of the car and reduces engine noise level. That the system of release of the fulfilled gases could work normally, it should be in good repair. The condition of system of release of the fulfilled gases influences also capacity of the engine and the fuel expense.
The system of release of the fulfilled gases consists of a final collector, a reception exhaust pipe, the central and back mufflers, catalytic neutralizer.
Elements of system of release are connected by means of carving connections or collars.
Notes
Always replace linings and self-locking nuts.
After service or repair of system of release of the fulfilled gases check up, that its details have been established freely, without pressure, with a sufficient backlash concerning body elements.
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Fig. 4.2–1. System of release of the fulfilled gases of cars with six-cylinder petrol engines: 1 – a system suspension bracket; 2 – an arm; 3 – a bolt, 25 Нм; 4 – a nut, 25 Нм; 5 – a lining, Нм; 6 – a reception exhaust pipe; 7 – nuts, 25 Нм; 8 – a final collector; 9 – a nut, 25 Нм; 10 – a lining; 11 – a lining; 12 – the ljambda-gauge, 55 Нм; 13 – neutralizers; 14 – neutralizers; 15 – collars; 16 – a nut, 25 Нм; 17 – a suspension bracket arm; 18 – an exhaust system suspension bracket; 19 – the back muffler; 20 – a collar; 21 – the central muffler
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At installation of the ljambda-gauge 12 (fig. 4.2–1) it is necessary to put on its carving high-temperature greasing G 052 112 A3.
The connecting element in a forward exhaust pipe should not be bent more than on 10 , otherwise it will be damaged.
At installation of system of release the distance between forward pipes of the central muffler and a cross-section beam in a free condition should make 43 mm.
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Fig. 4.2–2. Distance between exhaust pipes, карданным shaft and elements of a body of all-wheel drive cars:
1 – a cross-section beam; 2 – exhaust pipes;
3 – propeller a shaft of cars with a mechanical transmission; 4 – propeller a shaft of cars with an automatic transmission; and = 22 mm; b = 10 mm (for a mechanical transmission); with = 17 mm (for an automatic transmission)
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It is necessary to sustain strictly distance between exhaust pipes, карданным shaft, elements of a body and a beam of a back suspension bracket (fig. 4.2–2 – 4.2–10).
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Fig. 4.2–3. Distance between exhaust pipes and a beam of a back suspension bracket of cars: And – an exhaust pipe; In – a beam of a back suspension bracket; and = 27 mm; b = 20 mm
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Fig. 4.2–4. Distance between exhaust pipes and elements of a back bumper of cars: and – about 27 mm, should be identical from two parties; b = 20–22,5 mm
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Fig. 4.2–5. Elements of a suspension bracket of a forward part of a forward exhaust pipe to body elements on front-wheel cars of early releases with an automatic transmission: 1, 2 – bolts, 25 Нм;
3, 4 – self-locking nuts, 25 Нм
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Fig. 4.2–6. Elements of a suspension bracket of a forward part of a forward exhaust pipe to body elements on front-wheel cars of late releases with an automatic transmission: 1, 3, 4, 6, 7 – bolts,
25 Нм; 2, 5 – self-locking nuts, 25 Нм
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Fig. 4.2–7. Elements of a suspension bracket of a forward part of a forward exhaust pipe to body elements on all-wheel drive cars with an automatic transmission: 1, 2, 3 – bolts, 25 Нм; 4, 5, 6 – self-locking nuts, 25 Нм
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Fig. 4.2–8. System of release of the fulfilled gases of cars with eight-cylinder petrol engines: 1 – the left final collector; 2 – linings of final collectors; 3 – the right final collector; 4 – ljambda-gauges, 50 Нм; 5 – a reception exhaust pipe; 6 – linings; 7 – a nut, 25 Нм; 8 – right каталитический neutralizer; 9 – dual collars (fastening bolts tighten in regular intervals till the moment 40 Нм); 10 – the forward muffler; 11 – a system suspension bracket; 12 – the central muffler; 13 – the back muffler; 14 – a suspension bracket of system of release; 15 – left каталитический neutralizer; 16 – a reception exhaust pipe; 17, 18 – nuts, 25 Нм
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Fig. 4.2–9. Elements of a suspension bracket left catalytic neutralizer: 1 – a transmission; 2 – a bolt, 25 Нм; 3 – an earring; 4 – an arm; 5 – a bolt, 25 Нм; 6 – a nut, 25 Нм; 7 – a forward exhaust pipe
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Fig. 4.2–10. Elements of a suspension bracket right catalytic neutralizer: 1 – a nut, 25 Нм; 2 – an earring; 3 – an arm; 4 – a bolt, 25 Нм; 5 – a transmission; 6 – a bolt, 25 Нм
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On front and all-wheel drive cars of a suspension bracket of a forward part of a forward exhaust pipe to body elements differ on a design (fig. 4.2–5 see).
For simplification of unscrewing grease nuts and bolts, крепящие system of release, high-temperature paste Liqui Moly LM–508–ASC.
Before repeated installation of elements of system clear places of their connection by an emery paper of the hermetic and rust rests.
Separation of the central and back mufflers
If separation of pipes of system of release is complicated, by means of the autogenous welding device warm up a junction of pipes and separate them.
Back and central mufflers are executed in the form of the uniform block, however it is possible to replace each of them separately.
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Fig. 4.2–11. A place of cutting of the central and back mufflers of cars with six-cylinder engines: and = 240 mm
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For replacement only one muffler it is necessary to remove the block of the central and back mufflers from the car and to cut them on certain distance from the central muffler (fig. 4.2–11 and 4.2–12).
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Fig. 4.2–12. A place of cutting of the central and back mufflers of cars with eight-cylinder engines: and = 240 mm; b = 200 mm
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Fig. 4.2–13. An arrangement of the clip connecting the central and back mufflers
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Connect new section of the muffler with old and establish a collar, having arranged it so that the bottom edge of a bolt of fastening of a collar settled down at level of a pipe of mufflers (fig. 4.2–13).
Alignment of elements of system of release of the fulfilled gases
Alignment of elements of system of release of the fulfilled gases spend on the cold engine.
Loosen the bolts of fastening of collars.
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Fig. 4.2–14. Correct position of a suspension bracket of the back muffler: and = 10 mm
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Move release system forward so that the suspension bracket of the back muffler has been preliminary loaded (fig. 4.2–14).
Tighten bolts of fastening of collars the moment 40 Нм.
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