Usually, the catalytic converter is removed when it is coked or damaged.
The nuts that secure the catalytic converter to the cylinder head are difficult to access.
In addition, the catalytic converter flange is sealed with a metal-reinforced gasket.
The sealing gasket must be replaced every time the connection is disassembled.
Before removing the catalytic converter, you must remove the intake manifold - this will facilitate access to its mount.
Remove the decorative engine cover.
Remove the wire from the negative terminal of the battery.
Disconnect the exhaust pipe of the additional muffler from the catalytic converter by unscrewing the nuts that secure the exhaust pipe flange to the catalytic converter flange and remove the exhaust pipe flange from the flange studs. catalytic collector.
Remove the air filter (see "Replacing the air filter Lada Priora").
Remove the air supply sleeve and three hoses of the crankcase ventilation system (see. "How to clean the crankcase ventilation system of the Lada Priora").
Disconnect the four connectors of the ignition module wiring harness and move the harness to the side.
Remove the ignition modules
Remove the throttle assembly (see "How to remove the throttle assembly Lada Priora").
Remove the intake manifold (see "How to replace the cylinder head cover gasket VAZ-21126").
Disconnect the harness pads from the engine harness control and diagnostic oxygen concentration sensor wires and disconnect the control and diagnostic oxygen concentration sensor wire harness holders from the steering gear heat shield.
Unscrew the three nuts securing the heat-insulating shield of the steering gear to the engine shield and remove the shield.
Unscrew the two nuts securing the bracket of the water pump inlet pipe, unscrew the bolts securing the catalytic collector to its mounting bracket, unscrew the eight nuts securing the catalytic collector to the cylinder head and remove catalytic collector.
Disconnecting the catalytic collector from the cylinder head and its defect detection are described in detail in the article - "Replacing the catalytic collector gasket of the VAZ-21126 engine".
Remove the catalytic collector sealing gasket from the cylinder head studs
Clean the cylinder head and catalytic collector flanges from the remains of the old gasket and carbon deposits
Unscrew both oxygen sensors from the catalytic collector and install them on a new one catalytic converter
Install the catalytic converter and all removed parts in the reverse order of removal.
The mounting studs and gasket must be lubricated with graphite grease.
