Extraneous, rattling noise coming from under the bottom of the car sometimes indicates the destruction of the inner mesh of the catalyst. To refute or verify the correctness of the suspicions that have arisen, it is enough to drive onto an overpass, inspection pit or lift and, from below, listen to the sound of each of the elements of the exhaust system with the engine running.
Necessary
- - a 13 mm spanner or spanner - 1 pc.,
- - 19 mm spanner or box wrench - 1 pc.
Instructions
Step 1
In cases where it was found by inspection that the trouble comes from the catalyst and the suspicions were confirmed, it must be dismantled from the car in order to study the malfunction in detail, as well as to determine further actions to carry out restorative repairs.
Step 2
The catalytic converter in the exhaust system is usually mounted either on flanges or with clamps, but sometimes a combined mount is also found (front - flange, rear - clamp). Therefore, by unscrewing the bolts and releasing the specified part from the fastening, it is dismantled from the exhaust system pipeline. After that, visual inspection reveals all external and internal damage to the catalyst. During troubleshooting, special attention is paid to the condition of the internal ceramic honeycomb.
Step 3
They are often the reason for the failure of the exhaust gas catalyst. All further actions develop according to three options:
- first: particles of the destroyed ceramic mesh are removed from the inside of the catalyst, and then it is installed in the system;
- the second: all the contents are knocked out of the catalyst with a hammer and a punch, after which it, in a "lightweight" form, is re-mounted on the machine;
- third: the failed part is replaced with a new part.
