Attempting to seal too large a hole without a patch can result in an imperfect seal or the exhaust leak resurfacing after a few hours of driving. Determine if the hole is small enough to be sealed without a patch. Small cracks or pinholes can be sealed using just epoxy or exhaust tape, but larger holes will need a patch. If the leak is a thin crack or small hole, you can proceed without purchasing or making a patch to help. If the hole is larger, you will need a patch as well as epoxy.
Dab the epoxy over the leak, then use the wooden dowel to spread it around the area. Leave a thick layer of epoxy over and around the leak. Other forms of exhaust repair tape needs to be wet before applying. Once you have scraped off most of the dirt and grime, take a piece of fine grit sandpaper and use it to scrub the portion of the pipe you need to repair. Sandpaper will remove the last bits of dirt as well as creating tiny micro abrasions in the metal to help the tape or epoxy adhere to it. Depending on the type of damage you identify on your exhaust piping, your repair options may vary. If the exhaust piping is covered in extensive rust, that entire component of the exhaust may need to be replaced by a professional. Small scrapes or holes can be addressed without cutting out portions of the exhaust. Never work beneath a vehicle supported only by a jack. Once the vehicle is jacked up, place jack stands beneath the vehicle to support its weight.
We have three plants at work, two operating offices in China and one in South Korea. The company has a total manufacture area of square meters, with 400 employees, including 30 engineers, working together. There are 7 production lines for exhaust flexible pipe, 5 for EGR pipe, 4 for hydro forming parts and 3 for tail pipe, reaching a capacity of 7 million pieces annually. An in-house laboratory center is used to test material, product and its performance to ensure the quality. Volvo has been known and acknowledged for their attention to quality, which has been a part of their brand throughout their long history. They have created a broad vehicle product line with advanced designs, all with a motivation to keep on producing an innovative vehicle and product selection.