Attention! Inspection and repair of the elements of the exhaust system should be performed only after the system has completely cooled down.
1. The exhaust system includes an exhaust manifold (s), catalytic converters, muffler, rear exhaust pipe and exhaust pipes that connect these elements together, as well as hanging supports and clamps that support and secure these elements. The exhaust system is attached to the body with support brackets and rubber suspension mounts (pic. 16.1, a) If any of these elements are damaged or worn, increased noise and vibration will be transmitted to the bodywork. The exhaust system consists of various sections that are bolted together. Some of these sections consist of several elements welded into one assembly. For example, the center section of the exhaust system, which is also the longest section, includes the rear catalytic converter and pre-silencer (pic. 16.1, b, c). If any of these items are damaged, you will need to replace the assembly with it, or cut off the catalytic converter or muffler and weld in a new block. You will also need to remove the center exhaust pipe to remove the fuel tank.
Pic. 16.1, a. Each section of the exhaust system (rear muffler shown) suspensions on rubber suspension supports. Over time, the rubber can age and then crack or tear. Be sure to inspect the exhaust hanger whenever you perform service under the vehicle. If they are damaged or worn, replace them immediately.
Pic. 16.1, b. The center exhaust pipe assembly is the longest and most bulky part of the exhaust system. It consists of a rear catalytic converter (A) and front muffler (IN). To detach the front end of the center exhaust pipe, remove the two bolts (WITH)
Pic. 16.1, c. To detach the rear end of the center exhaust pipe assembly, remove the two bolts
2. Regular inspections of the exhaust system allow you to keep it in working condition, eliminating the generation of increased noise. The inspection should look for damaged or deformed parts, exposed seams, missing holes, loose connections, excessive corrosion, or other damage that could allow exhaust gases to enter the vehicle. Do not repair damaged parts of the exhaust system. Replace them.
3. If the elements of the system have been severely corroded, it may be necessary to cut them out of the exhaust system. The most convenient way is to contact a specialized repair shop, where corroded areas will be cut out with a gas cutter. However, if you want to save money by doing it yourself but don't have gas torch oxy-acetylene welding equipment, just cut off the old pieces with a bench saw. If you have the opportunity to use compressed air, you can also use special pneumatic cutters. If you are going to do this work yourself, prepare eye protection and heavy gloves to protect yourself from metal chips.
4. There are some simple recommendations for repairing the exhaust system:
- A) When removing the exhaust system components, work in the direction from the rear end to the front.
- b) To facilitate the removal of the fastening elements of the exhaust system sections, apply penetrating oil to them.
- V) Use new gaskets, brackets and clips when installing exhaust system components. If the condition of the fastening elements is far from ideal, it is recommended to replace them at the same time. Even if you successfully unscrew the rusted fasteners, they will be even more difficult to unscrew in the next cut when you need to do so. Also, the next time they are loosened or tightened, they may break.
- G) When assembling, apply a suitable lubricant to the threads of all fasteners of the exhaust system. Take care to create sufficient clearance between the newly installed parts and all elements on the bottom of the car to prevent overheating of the bottom and, as a result, possible damage to the interior flooring and insulation. Pay close attention to the catalytic converter and its heat shield.
Attention! The catalytic converter operates at very high temperatures and takes a long time to cool down. Wait until the converter has completely cooled down before attempting to remove the converter. Failure to follow this instruction may result in severe burns.