What is the Exhaust Manifold Gasket?
Depending on your engine and type of car, the exhaust manifold can either be a set of pipes or it can be a cast iron manifold assembly. Basically, the exhaust manifold takes the burned exhaust gases from the engine’s cylinders and ejects the gas through the exhaust system and out through the vehicle’s tail pipe. The exhaust manifold gasket seals the surface of the exhaust manifold to the surface of the cylinder head, keeping it from leaks in the system. Over time, the constant expansion and contraction of the parts (caused by constant heating and cooling in the engine), may make the gasket to leak. These leaks can be hazardous as hot exhaust gases escape and can spoil other components in the engine compartment. A leaky exhaust manifold gasket can also impact engine performance.
Keep in mind:
Sometimes an exhaust manifold begin to leak because a mounting bolt has broken. If this happens, the mechanic will have to take out the broken bolt or stud, which can increase the labor time needed to fix the problem. Your mechanic may charge you an additional fee, depending on the severity of the situation.
How it’s done:
- Check the exhaust system for leaks.
- Determine if it is the manifold or flange gasket that is leaking.
- Remove and change faulty gasket.
- Apply anti-seize to the threads of the bolts.
- mount new exhaust manifold gasket.
- Start vehicle and check for any exhaust leaks.
The exhaust manifold gasket assist in transferring burned gasses from the engine. It is found in a high temperature zone, and it will leak eventually. There is no way to stop it. Your mechanic should use anti-seize compound on the bolts when they are changing this part. This will help prevent bolts from breaking in the cylinder head.
What common symptoms show you may need to replace the Exhaust Manifold Gasket?
- Loud noise from engine.
- Lack of engine performance.
- Check engine light is on.
- Smells from the engine compartment (eg. plastic part next to exhaust manifold melting from escaped heat).
How important is this repairs?
A leaky exhaust manifold is a health and safety issue. Hot exhaust gases escaping from the engine can be a fire hazard melting nearby plastic parts in the engine compartment.