Gasket - Exhaust pipe refers to the sealing gasket (gasket) in the exhaust pipe system, used to ensure sealing and prevent exhaust gas leakage when connecting various parts of the exhaust pipe (such as manifold, catalytic converter, muffler, etc.). The following is a summary of the relevant information:
1. Function of exhaust pipe sealing gasket
Sealing: prevent high-temperature exhaust gas from leaking from the connection, ensuring that all exhaust gas flows to the tailpipe.
Shock absorption: Buffer the vibration between exhaust pipe components, reduce metal friction and noise.
High temperature/corrosion resistance: usually made of metals (such as stainless steel, copper) or composite materials (graphite, asbestos), resistant to high temperatures and corrosive gases.
2. Common types
Metal gasket: commonly used in high-temperature and high-pressure areas (such as the connection between exhaust manifold and cylinder block), durable but expensive.
Composite gasket: containing graphite or ceramic fibers, with good elasticity, suitable for irregular surfaces.
Ring gasket: used at the flange connection of exhaust pipes, such as the interface of mufflers or catalytic converters.
3. Timing of replacement
Exhaust gas leakage: When starting, hear a "plop" sound or smell an odor of exhaust gas.
Loose/broken screws: Failure of the gasket may result in loose fixing bolts.
Visible damage: When disassembling the exhaust pipe, uneven indentation, burning or cracking of the gasket was found.
4. Replacement steps (simplified version)
Lifting the vehicle: Ensure safe support for easy operation.
Dismantling old gaskets: Loosen the connecting bolts, remove residual gaskets and carbon deposits.
Install new gasket: Align the position and tighten the bolts according to the maintenance manual torque (to avoid deformation caused by over tightening).
Check the sealing: Start the engine and use soapy water to check for any air bubbles or leaks.
5. Precautions
Material matching: Choose original or equivalent specification gaskets (such as temperature/pressure rating).
Clean the contact surface: Old sealant or carbon residue can affect the sealing effect.
Torque specification: Overtightening may damage gaskets or flanges.