Remove, install catalytic converter and front exhaust system - AR49.10-P-5531AM
ENGINE 113.991 in MODELS 215.374, 220.074 /174
Fig 1: Identifying Catalytic Converter And Front Exhaust System Remove/Install Components - Engine 113
| Remove/install | |||
| Notes on disposing of catalytic converters | OS49.10-P-1000-01A | ||
| 1 | Disconnect connector for left O2 sensor, upstream of TWC (G3/3x1), connector for right O2 sensor, upstream TWC (G3/4x1), connector for left O2 sensor, downstream TWC (G3/5x1), connector for right O2 sensor, downstream of TWC (G3/6x1) | ||
| 2 | Unscrew bolts (11/5) with nuts (11/3) at flange connection between front exhaust system / rear exhaust system | ||
| *BA49.10-P-1014-01A | |||
| 3 | Unscrew bolts (11/1) at flange connection between front exhaust system / exhaust manifold | If screws are stiff or thread is damaged:↓ | |
| Replace rivet nuts in exhaust manifold. | AR49.10-P-5531-01DA | ||
| *BA14.10-P-1002-01B | |||
| 4 | Unscrew nuts (11/2) on bracket | ||
| 5 | Lift out three way catalytic converters (158) or front exhaust system | Use emery cloth to clean connection points free of combustion and corrosion residues. Replace nuts (11/3). |
|
| 6 | Install in the reverse order |
| Number | Designation | Engine 113.987/ 988/990/ 991 | |
|---|---|---|---|
| BA14.10-P-1001-01B | Nut to exhaust manifold | Nm | 16 |
| BA14.10-P-1002-01B | Flange connection, exhaust manifold and front exhaust pipes | Nm | 20 |
| Number | Designation | Engine 113 in models 215, 220 | |
|---|---|---|---|
| BA49.10-P-1014-01A | Self-locking nut, rear muffler flange connection to three way catalytic converter | Nm | 20 |