The gas exhaust system consists of an exhaust manifold, a metal compensator, a catalytic converter, an additional and main silencer
Replacing the suspension cushions of the exhaust system parts
If the rubber cushions of the exhaust system suspension are damaged, knocking under the underbody of the car may be heard while the vehicle is moving or when the engine is started due to the contact of the system parts with the body or rear suspension parts.
Pillows can be torn, lose elasticity, cracks and tears.
When replacing pillows, we perform work on a viewing ditch or overpass.
Removing the neutralizer suspension cushion
With a 13 head, unscrew the bolt securing the pillow to the bracket, welded to the front end of the converter
With a 10 head, unscrew the two bolts securing the pillow to the cross member of the body
Removing the pillow
Removing the suspension cushion of the pipe of the additional muffler
To remove the pillow for the suspension of the pipe of the additional muffler, use a screwdriver to squeeze the pillow from the pipe bracket and inject soap solution into the gap formed.
Using a large screwdriver, pull the pillow off the pipe bracket.
In the same way, we inject soapy water into the gap between the body bracket and the pillow.
Pulling the pillow off the body bracket
Removing the pillow
If the pillow is replaced, you can cut the old pillow with a knife.
Removing the main muffler cushions
To remove the right suspension cushion of the main muffler, moisten the cushion holes with soapy water.
Use a large screwdriver to pull the pillow off the muffler bracket
Pulling the pillow off the body bracket
Removing the pillow
We also remove the left suspension cushion of the main muffler
Before installing new muffler suspension cushions, we clean the body brackets and elements of the exhaust system.
Removing the exhaust system on a 4x4 vehicle
We remove one by one three rubber cushions for the suspension of the additional and main mufflers from the body brackets or brackets of the exhaust system, and also unscrew the bolt securing the cushion to the catalytic converter, see above.
Using a 10 head, unscrew the two nuts securing the metal compensator flange to the exhaust manifold flange
Removing the exhaust system
Remove the metal multilayer gasket from the exhaust manifold studs.
Install the exhaust system in reverse order.
Removing the exhaust system on a 4x2 car
To remove parts of the exhaust system from the space between the body and the rear suspension beam, we hang the rear of the car.
We remove one by one two rubber cushions of the exhaust system suspension from the body brackets or brackets of the exhaust system parts.
We unscrew the nuts securing the metal compensator flange to the exhaust manifold flange (see above).
We move the exhaust system back and, passing the parts of the exhaust system between the rear suspension beam and the underbody, remove the exhaust system.
Install the parts in reverse order.
Replacing elements of the exhaust system
We replace elements of the exhaust system in cases of burnout, through corrosion, major mechanical damage or if the catalytic converter fails.
We carry out the work on a viewing ditch or overpass. Operations for replacing elements of the exhaust system are shown on a 4x4 vehicle.
If necessary, remove the oxygen concentration sensors (article - Removing the ECU and COURT sensors of the Renault Duster car).
Since the design of the exhaust system is non-separable (with the exception of connecting the exhaust manifold with the rest of the system), in order to replace its individual element, it is necessary to cut the part to be replaced from the pipeline.
The spare parts are supplied separately with the additional and main mufflers, as well as a catalytic converter with a metal compensator.
To connect the parts, you must also purchase one or two (when replacing an additional muffler) special clamps.
Before replacing a metal compensator with a catalytic converter or an additional muffler, mark the cut location on the pipe connecting the catalytic converter and the additional muffler.
To do this, we halve the distance (which is 80 mm) between the two marks located on the pipe.
Mark the place of cutting with chalk or marker
We cut off the pipe according to the marked mark.
After cutting the pipe, you can replace the metal compensator with a catalytic converter.
To do this, unscrew the bolt securing the suspension cushion of the system to the catalytic converter, disconnect the metal compensator flange from the exhaust manifold flange and remove the metal compensator with the catalytic converter.
Having installed a new metal compensator with a neutralizer, we connect the pipes between the neutralizer and the additional muffler with a special clamp.
To replace the additional or main silencers, it is necessary to cut the pipe connecting them.
To do this, draw a line with chalk or a marker in the middle between the two marks on the pipe connecting the mufflers.
Using a hacksaw for metal, cut the pipe along the marked mark.
Then, when replacing the main muffler, remove the muffler brackets from the rubber pads and remove the muffler.
When replacing an additional muffler, we also cut the pipe connecting the muffler and the catalytic converter (see above), and remove the additional muffler by removing its pipe bracket from the rubber cushion.
When installing a new main or additional silencer at the junction of their pipes, we use a special clamp.
On a 4x2 car, the exhaust system can also be replaced either entirely or its individual elements, which are supplied as spare parts.
In order to replace the catalytic converter, it is necessary to cut the pipe connecting the catalytic converter and the additional muffler,
The place of the cut is shown on the pipe by marks in the form of two points, between which a cut should be made.
To replace the additional or main muffler, it is necessary once. cut the pipe connecting these parts according to the marks, as in the case of replacing the catalytic converter.
Removing the exhaust manifold
We carry out the work when replacing the gasket in the connection of the exhaust manifold with the cylinder head or when repairing the cylinder head.
The junction of the manifold with the cylinder head mating plane is sealed with a metal gasket.
In the event that the gasket is burnt out or the tightening of the collector nuts is loose, exhaust gases can escape through this connection to the outside, which is accompanied by a characteristic sound.
If the defect cannot be eliminated by tightening the exhaust manifold retaining nuts, the gasket must be replaced.
We carry out the work on a viewing ditch or overpass.
We remove the air filter housing (article - Removing and installing the receiver of the Renault Duster engine)
Disconnect the metal compensator flange from the exhaust manifold flange of the exhaust system, see above.
From the bottom of the car, using an 8 spanner spanner, unscrew the two bolts securing the upper protective screen to the exhaust manifold flange.
From above, use the same tool to unscrew the three bolts securing the upper heat shield to the exhaust manifold.
Remove the upper heat shield.
We unscrew the control oxygen concentration sensor from the exhaust manifold hole (article - Removing the ECU and sensors of the COURT of the Renault Duster car)
With a 10 high head, unscrew the nine nuts securing the exhaust manifold to the cylinder head
With a 13 head, unscrew the two bolts securing the exhaust manifold to the gearbox bracket by a few turns.
We move the exhaust manifold along the pins of the cylinder head and remove the bolts from the grooves of the gearbox bracket
We take out the exhaust manifold
Remove the exhaust manifold metal gasket
Using the 8 head, unscrew the four bolts securing the lower heat shield to the exhaust manifold
Removing the screen.
Before installing the exhaust manifold, we clean the mating surfaces of the cylinder head and exhaust manifold from carbon deposits and install a new gasket.
Before tightening the collector nuts, apply graphite powder to the cylinder head studs.
Tighten the fastening nuts with a torque of 18 Nm.
We tighten in the sequence shown in the photo.
We wrap the bolts of the exhaust manifold to the gearbox bracket after tightening the nuts securing the manifold to the cylinder head.