How can I repair my exhaust system?

Proper methods for exhaust pipe repair should be selected based on the type and extent of damage. Common methods include welding, patching, or replacing partial pipe sections. For small cracks or damage, welding can provide high strength, but it requires professional equipment and techniques, and attention should be paid to rust prevention at the weld joints during long-term use. For larger damage, metal patches fixed with rivets can be used; this method has lower cost but may slightly affect exhaust flow. If the damage is severe (such as extensive rust or deformation), it is recommended to replace the matching pipe section to ensure sealing, with costs ranging from approximately 300 to 800 Malaysian Ringgit. For temporary emergencies, aluminum foil wrapping or special sealant can be used, but their durability is limited. It is important to note that after exhaust pipe repair, a leak check should be performed to avoid affecting engine performance and emission compliance. If the three-way catalytic converter is clogged, carbon deposits need to be cleaned first; in severe cases, professional cleaning or component replacement is required. It is recommended that non-professionals entrust complex repairs to certified repair shops to ensure safety and repair quality.