Change Car Rear Silencer Chevrolet Impala

Change Car Rear Silencer

Easy 1h30 ~150$

Time Estimate	1h30
Cost Estimate	~150$
Difficulty	Easy
Vehicles	Impala Mk X 2014-2020 1 3.6 Gas (LFX)
Repair the silencer*	1h30
Repair the front silencer*	1h30
Align the front silencer*	0h30
Repair the main silencer*	1h30
Align the main silencer*	0h30
Difficult main silencer removal*	0h30
Repair the rear silencer*	1h30
Weld a sheet-metal repair panel onto the rear silencer*	0h45
Difficult rear silencer removal*	0h30

What is a Chevrolet Impala rear silencer?

The rear silencer (also called the back box or rear muffler) reduces exhaust noise to an acceptable level. It is located at the end of the exhaust line, after the catalytic converter, particulate filter (if fitted), and sometimes an intermediate silencer.

When should you change the Chevrolet Impala rear silencer?

No periodic replacement interval is specified. Carry out regular visual inspections for corrosion, holes, and deteriorated mounting rubbers. Signs that replacement is needed: louder exhaust noise, rattling from loose baffles, visible rust holes, exhaust fumes entering the cabin, or failure at the MOT/roadworthiness test.

Is it difficult to change the Chevrolet Impala rear silencer?

Difficulty level 2/5: technically easy but may require effort if bolts and clamps are rusted. Key steps: raise the vehicle, apply penetrating oil to clamp bolts, remove the clamp connecting the silencer to the intermediate pipe, remove the mounting rubber hangers, fit the new silencer with new gasket/clamp, reattach mounting rubbers, check for leaks with engine running.

4 generations covered

Generation	Years	Vehicles	Fuel
Impala 1972-1976	1972-1976	6.6 Gas (U)	Gas
Impala 1977-1986	1977-1986	3.8 Gas (LD5 (A)), 4.1 Gas (D), 4.4 Gas (J), 5.7 Diesel (N), 5.7 Gas (L), 5.7 Gas (LG4 (H))	Diesel, Gas
Impala 1999-2016	1999-2016	3.5 VVT Flex Fuel Gas (LZE), 3.5 VVT Gas (LZ4), 3.6 Gas (LFX), 3.9 Flex Fuel Gas (LZG), 3.9 Gas (LZ8), 3.9 Gas (LZ9), 3.9, -Flex Fuel Gas (LGD), 5.3 Gas (LS4)	Gas
Impala Mk X 2014-2020	2014-2020	2.4 48V (MHEV),Gas (LUK), 2.5 Flex Fuel Gas (LCV), 2.5 Gas (LKW), 3.6 CNG CNG (LFR), 3.6 Gas (LFX)	48V (MHEV), CNG, Gas