Note: Vehicles with BLY and BVZ engines comply with the EU emission standard 2. These vehicles do not have some components related to the exhaust system, such as the EGR system, Lambda probe 2 and Lambda probe 2 after the catalytic converter. This must be taken into account during installation work.
Removal of a reception pipe with the catalyst
Pic. 2.245. Bottom protection
Remove the underbody protection on the right (pic. 2.245).
Vehicles with BLR, BLX, BVX and BVY engines
Remove the connectors for the lambda probes from the holder and disconnect them.
Release the lambda probe harness.
Pic. 2.246. Bottom transverse support
Remove the cross support from the bottom (pic. 2.246).
Vehicles with engine code BLX, BVX
Disconnect the plug (black) from the NOx sensor control unit.
Remove the NOx sensor control unit and release the wiring harness with the control unit.
Disconnect the plug (black) for the exhaust gas temperature sensor and release the wiring harness.
Disconnect the plug (black) for the lambda probe after the catalytic converter and release the wiring harness.
Disconnect the plug (black) 4 for the lambda probe after the catalytic converter and release the wiring harness.
Remove the cross support from the bottom.
Continuation of assembly operations for all vehicles
Pic. 2.247. Clamp fastening
Disconnect the exhaust system by loosening the clamp clamp (pic. 2.247).
Pic. 2.88. Exhaust holder
Unscrew the exhaust system holder (pic. 2.88).
Note: On vehicles with BLX and BVX engines, the exhaust system holder is removed together with the lambda probe cable box after the catalytic converter.
Pic. 2.90. Downpipe mount
Unscrew the nuts securing the intake pipe to the exhaust manifold (pic. 2.90).
Note: The split elements in the downpipe must not be bent more than 10°. There is a risk of damage.
Remove the exhaust pipe with the catalyst.
Installation of a downpipe with a catalyst
Installation is carried out in the reverse order, paying attention to the following.
All cable ties should be installed in their original locations.
Replace gaskets and self-locking nuts.
Lubricate the exhaust manifold dowel pins with heat-resistant grease
Lubricate the threads of the lambda probes and the NOx sensor (in vehicles with BLX and BVX engines) heat-resistant paste; the paste must not get on the slots of the probe body.
Position clamping collar 2 so as to achieve dimension A between clamp 2 and mark on downpipe 3.
Note: There are 3 marks on the downpipe.
Install the clamping collar so that the end of the bolt does not protrude beyond the lower edge of the clamp.
Pic. 2.248. Scheme of installation of clamping clamps: 1 - intermediate muffler; 2 - clamping collar; 3 - receiving pipe; a - dimension a approx. 5 mm
Tightening torques
Downpipe to exhaust manifold: 25 Nm.
Clamp: 25 Nm.
Cross support to the bottom: 23 Nm.
Bracket to auxiliary frame: 25 Nm.
Note: Lubricate the exhaust manifold dowel pins with heat-resistant grease
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