Removal
1. Prepare the car for work (see "Preparing the vehicle for maintenance and repair").
2. Remove the engine splash guard (see "Engine mudguard - technical condition check").
Caution! To avoid burns, work should be performed after the exhaust system parts have cooled to a safe temperature.
3. Treat all threaded connections with penetrating lubricant.
4. Disconnect the additional muffler from the catalytic manifold (see "Additional muffler - replacement").
5. Disconnect the oxygen concentration sensor connectors from the engine compartment wiring harness connectors and remove the upper oxygen concentration sensor (see "Oxygen Concentration Sensor - Checking and Replacing").
6. Using a 10 mm socket wrench, unscrew the five bolts securing the manifold protective cover (three at the bottom and two at the top, in the photo you can only see two bolts at the bottom).
7. Remove the protective cover and take it out of the engine compartment.
8. Using a 13 mm socket wrench, unscrew the two bolts securing the catalytic manifold to the bracket.
9. Using a 13 mm wrench, unscrew the eight nuts securing the catalytic manifold.
10. Remove the catalytic collector.
11. Remove the cylinder head sealing gasket from the studs.
12. Unscrew the lower oxygen concentration sensor with a 22 mm wrench (see "Oxygen Concentration Sensor - Checking and Replacing").
On a car that has been in operation for a long time, as a rule, it is not possible to unscrew the bolt that secures the catalytic converter to the bracket without breaking the heads. The bracket itself is also damaged by corrosion. In these cases, the faulty parts should be replaced along with the manifold.
Installation
We install the catalytic collector in the reverse order. We replace the gasket and parts damaged by corrosion.