The oxygen sensor required to regulate the catalytic converter is screwed into the catalytic converter housing or into the front exhaust pipe, depending on the vehicle model.
The exhaust system of the turbocharged diesel engine has only two rear mufflers, there is no pre-muffler.
The front exhaust pipe is connected via a spring-loaded joint to the exhaust pipe. All parts are connected with bolts and can be replaced separately. Self-locking nuts and sealing gaskets should be replaced with new ones after removal. Retaining rings and rubber shock absorbers are checked for porosity and replaced if necessary. When installing a new exhaust system, it is recommended to also update all fastening parts.
The figure shows the exhaust system of vehicles manufactured before 9/93 with engines up to 112 hp. The exhaust system of vehicles manufactured since 10/93 is shown on the next page.
- 1 - sealing gasket
- 2 - outlet pipe
- 3 - self-locking nut, 25 Nm
Only if a catalyst is present:
- 4 — nipple, 35 Nm
- 5 — CO sampling tube, 20 Nm
- 6 — cap
- 7 — mechanical seal
Replace only if damaged or leaking.
- 8 - pressure spring
- 9 — clamping sleeve
- 10 - designation "S"
If there is an automatic transmission, the designation is "A".
(The original text can be found at: «www.VWManual.ru»)
- 11 - bolts
Tightening torques: M6 thread - 5 Nm: M8 thread - 25 Nm: M10 thread - 40 Nm.
- 12 - size "a" - 5 mm
- 13 — designation
- 14 - protective screen
- 15 - Front exhaust pipe
For vehicles without a catalytic converter, the front exhaust pipe is extended to the pre-silencer.
- 16 - sealing ring
- 17 - self-locking nut, 15 Nm
- 18 - catalyst
- 19 - intermediate pipe
- 20 — suspension
- 21 - middle muffler
- 22 - subsequent muffler
- 23 - console
Cars manufactured since 10/93 (except for those with VR6 engine and all-wheel drive)
- 1 - front exhaust pipe
- 2 - bolt, 40 Nm
- 3 - double clamp
- 4 - intermediate pipe
- 5 - clamp type "clamp"
- 6 - console
- 7 — suspension
- 8 — bolt, 25 Nm
- 9 - subsequent muffler
- 10 — designation
For clamp type "clamp", 3 dents around the circumference.
- 11 - disconnection point
For repair, disconnect the exhaust pipe at a right angle. The middle and subsequent mufflers are supplied separately, with a connecting pipe and two clamps of the "clamp" type.
- 12 - separation point
- 13 - size "b" - about 10 mm
- 14 - size "a" - about 5 mm
- 15 — designation
- 16 - designation "S"
If there is an automatic transmission, the designation is "A".
- 17 - repair connecting pipe
- 18 - middle muffler
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