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Exhaust System: Overview Dodge Dart PF

Exhaust 8 illustrations ~472 words

Scheme 1

Scheme 1: DESCRIPTION
Scheme 1: DESCRIPTION

The exhaust system on the 1.4L exhaust engine models consists of a front mounted catalytic converter, resonator/pipe assembly, muffler/pipe assembly with two outlets, band clamps, and support isolators. The upstream oxygen sensor is located in the exhaust manifold. The downstream oxygen sensor is located in the catalytic converter.

Scheme 2

Scheme 2
Scheme 2

The exhaust system on the 2.0L exhaust engine models consists of a front mounted catalytic converter, resonator/pipe assembly, muffler/pipe assembly with a single outlet, band clamps, and support isolators. The upstream oxygen sensor is located in the exhaust manifold. The downstream oxygen sensor is located in the catalytic converter.

Resonators, mufflers, and exhaust pipes are tuned to each powertrain combination.

CONDITIONPOSSIBLE CAUSESCORRECTION
EXCESSIVE EXHAUST NOISE (UNDER HOOD)1. Exhaust manifold cracked or broken.1. Replace manifold.
2. Manifold to cylinder head leak.2. Tighten manifold and/or replace gasket.
3. EGR Valve to manifold gasket leakage.3. Tighten fasteners or replace gasket.
4. EGR Valve to EGR tube gasket leakage.4. Tighten fasteners or replace gasket.
5. EGR tube to manifold tube leakage.5. Tighten tube nut.
6. Exhaust flex-joint to manifold leak.6. Tighten joint fasteners and/or replace gasket.
7. Exhaust flex-joint.7. Replace catalytic converter assembly.
8. Pipe and shell noise from front exhaust pipe.8. Characteristic of single wall pipe.
EXCESSIVE EXHAUST NOISE1. Leak at exhaust pipe joints.1. Tighten clamps at leaking joints.
2. Burned or rusted out muffler assembly or exhaust pipe.2. Replace muffler resonator tailpipe assembly or exhaust pipe with catalytic converter assembly.
3. Burned or rusted out resonator.3. Replace muffler resonator tailpipe assembly.
4. Restriction in exhaust system.4. Perform Exhaust System RESTRICTION CHECK . Replace component as necessary.
5. Converter material in muffler.5. Replace muffler and converter assemblies. Check fuel injection and ignition systems for proper operation.

DESCRIPTION

TURBO

The catalytic converter is mounted between the turbocharger and the front exhaust pipe. The upstream O2 sensor boss is welded onto the inlet pipe.

The converter is mated to the turbocharger by way of a band clamp. The outlet pipe of the converter is secured by a two piece bracket and is attached to the front exhaust pipe by way of a flange. Both ends require gaskets.

NON TURBO

The gas engine exhaust system components consist of a maniverter, intermediate pipe, mufflers, and support isolators.

The catalytic converter is part of the exhaust manifold, called a maniverter. For removal of the maniverter, refer to MANIFOLD, EXHAUST, REMOVAL, 1.4L , MANIFOLD, EXHAUST, REMOVAL, 2.0L or MANIFOLD, EXHAUST, REMOVAL, 2.4L .

Scheme 3

Scheme 3: REMOVAL
Scheme 3: REMOVAL

Scheme 4

Scheme 4
Scheme 4

Scheme 5

Scheme 5
Scheme 5

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7
Scheme 7

Scheme 8

Scheme 8
Scheme 8
  1. Disconnect and isolate the negative battery cable.
  2. Remove the upper heat shield bolts (1). Remove and discard the nuts (2).
  3. Remove the Charge Air Cooler (CAC) supply hose (5) from the turbocharger.
  4. Remove the catalytic converter heat shield (3).
  5. Disconnect the upstream and downstream oxygen sensor connectors.
  6. Loosen the catalytic converter clamp (2) at the turbocharger (1).
  7. Raise and support vehicle. Refer to «HOISTING, STANDARD PROCEDURE»(ref-646211-S00664313032014072800000) .
  8. Remove the belly pan.
  9. Remove the front exhaust pipe support bolt (2).
  10. Remove the exhaust flange nuts (1).
  11. Remove the nuts that secure the cross under pipe to the catalytic converter.
  12. Remove the front exhaust pipe and flange gasket.
  13. Remove the converter mount bolts (3).
  14. Remove the catalytic converter lower support mount (2).
  15. Carefully lower the catalytic converter (1) down and out of the vehicle.
  16. Remove the catalytic converter gasket ring (1).

The exhaust system heat shields are attached to the under body of the vehicle.

OPERATION

Heat shields are needed to protect both the vehicle and the environment from the high temperatures developed near the catalytic converter.

Avoid application of rust prevention compounds or undercoating materials to exhaust system floor pan heat shields on vehicles so equipped. Light over spray near the edges is permitted. Application of coating will greatly reduce the efficiency of the heat shields resulting in excessive floor pan temperatures and objectionable fumes.

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