Dismantle of separate details
In following sections it is described, how separate connections of system of an exhaust are disconnected from each other. For assemblage last section about alignment of system of an exhaust is important.
At the left: in model with a drive on forward wheels with the six-cylinder engine only one каталитический the converter (3). Exhaust pipes from both blocks of cylinders (2) enter before catalytic the converter into one place. By figure "1" the double collar is shown.
On the right: at the six-cylinder engine in model quattro two separate каталитических the converter (2 and 3). By figure "1" the double collar is shown.
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Here by an arrow the ljambda-probe screwed in a final collector in the four-cylinder engine with working volume 1,6 l is shown. |
Various rubber suspension brackets of system of an exhaust
At the left: a forward suspension bracket of the terminal muffler in Audi A4 with a forward drive.
On the right: one of back suspension brackets of the terminal muffler in A4 quattro.
The exhaust system should be corrected without a tension
At the left: in Audi with a forward drive the forward suspension bracket should have a preliminary tension about 7 mm.
On the right: in quattro the fixing loop ahead on the intermediate muffler should have a preliminary tension about 7 mm.
Detachment of a reception pipe and final collector
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- Raspornye hairpins on which fixing nuts of a reception pipe settle down, easily break off, if with pressing strongly rusted nut unscrews.
- Therefore: process an anticorrosive spray screw connection or (it is frequent better):
- Destroy nuts a sharp chisel. As a rule, they are made of a soft material with the enclosed carving spiral. After that the carving part should be separately removed from a carving распорной hairpins.
- New nuts in a set for exhaust system fastening also are made from this a soft material. Do not use a nut from house stocks. The inhaling moment: 30 Nanometers.
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Ljambda-probe dismantle
The ljambda-probe should be dismantled at replacement каталитического the converter (or the probe).
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- Hang out wire arms on a body, disconnect sockets (see a wire on all its length).
- Unscrew a probe.
- At installation grease a ljambda-probe with anticorrosive greasing. Thus greasing should not get to area of apertures of a body of a probe. The inhaling moment: 50 Nanometers.
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Detachment of a triangular flange (with a spring)
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- Loosen the three screw connections on a connecting flange.
- If the sealing ring is enclosed, but on it it is necessary to pay special attention – it should not fall to a floor. The firm material can burst.
- If in a flange the lining it is necessary to replace it is enclosed.
- The moment of an inhaling of bolts: 25 Nanometers.
- At an inhaling it is necessary to pay attention to that bolts were tightened in parallel the friend
To the friend.
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Detachment of a double tubular collar
The double tubular collar faultlessly connects two cut off pieces of a pipe and is easily disconnected. Important: the double tubular collar cannot be used in the second time. It is necessary to replace it even after easing of screw connection.
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- Note an assembly arrangement of a collar for the subsequent assemblage.
- Disconnect screw connections of a double tubular collar; for this purpose process a carving rust solvent.
- If screw connection cannot be disconnected thus, separate a bolt from a nut by angular grinding car.
- Other possibility: cut a nut a chisel.
- The moment of an inhaling of screw connection: 25 Nanometers.
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Detachment of the intermediate muffler and the terminal muffler
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- In original system of an exhaust both mufflers are connected by a continuous piece of a pipe.
- To replace one of two mufflers, it is necessary to cut a connecting pipe.
- Not to doubt about a cutting place, transfer length of a pipe of the new muffler on a pipe of the old. For confidence leave a stock approximately in 10 mm. In this case at installation remains a few places for updating.
- Cut a pipe a saw for metal whenever possible at right angle.
- Because of a place lack hardly probable probably to make it on the established muffler. It is better to dismantle both mufflers together.
- Even if you replace both mufflers – as spare parts you can buy mufflers only separately.
- Connect pipes a double tubular collar how it was already told (from a warehouse of spare parts). The inhaling moment: 25 Nanometers.
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Alignment of system of an exhaust
The system of an exhaust established with reheavy, can become the reason of burdensome noise. Therefore:
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- Before a tightening of screw connections freely suspend exhaust system in fixing loops and correct:
- All details should be on sufficient distance from a body.
- The terminal muffler (mufflers) from different directions should be on identical distance from cut edges in a bumper.
- Tighten an arm on a transmission with the moment of an inhaling of 25 Nanometers. Pay attention to correctness of assemblage of a sleeve and a spring.
- Preliminary tension of system of an exhaust for maintenance of the balanced thermal expansion:
- In Audi with a forward drive the forward suspension bracket of the intermediate muffler should have a preliminary tension about 7 mm.
- In quattro the fixing loop ahead at the intermediate muffler should have a preliminary tension about 7 mm.
- In the end tighten all screw connections of system of an exhaust, beginning in front. The inhaling moments are specified in the previous sections.
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