To avoid burns, it is recommended to start work after the exhaust system has cooled down.
Disconnect the wiring block of the diagnostic oxygen concentration sensor from the wiring harness of the engine management system and unscrew the sensor from the intermediate pipe (see Removal the Oxygen Diagnostic Sensor).
We moisten the nuts that secure the intermediate pipe flange to the catalytic converter flange with a penetrating liquid.
Using a 14 mm head, unscrew the nuts of the three studs securing the intermediate pipe flange to the catalytic converter flange.
Using a 14 mm socket head, unscrew the bolt securing the catalytic converter bracket to the engine block.
Remove the catalytic converter bracket.
We move the pipe flange from the studs on the flange of the catalytic converter. We disconnect the flange of the first additional muffler on the intermediate pipe from the flange of the second additional muffler and remove the sealing gasket (see Replacing the additional muffler).
We turn the intermediate pipe over with the flange facing down and, moving it backwards, we remove it from the front suspension subframe.
We remove the sealing gasket of the flanges of the intermediate pipe and the catalytic converter.
We install new gaskets in the connections of the intermediate pipe with the catalytic converter and the flanges of the additional mufflers. We mount the intermediate pipe in the reverse order.
When installing the catalytic converter bracket, first tighten the bolt that secures it to the engine block until it stops, but do not tighten it, and then screw on and tighten the nut that secures the bracket to the flanges of the catalytic converter and the intermediate pipe.
After tightening the flange nuts, tighten the bracket mounting bolt to the engine block.
(The original material is located on the website: «CHEVYMAN.RU»)