The exhaust manifold gasket seals the connection between the engine’s cylinder head and the exhaust manifold. Its job is to prevent exhaust gases from leaking while directing them through the exhaust system. Over time, the gasket can crack, wear out, or fail due to constant heat cycles, leading to noisy operation and harmful fumes escaping. Replacing a faulty gasket restores proper sealing and protects both performance and safety.

What is an exhaust manifold gasket replacement?

This service involves removing the exhaust manifold, cleaning the surfaces, and fitting a new gasket between the manifold and cylinder head. A proper seal ensures exhaust gases flow correctly through the catalytic converter and muffler.

Why do you need an exhaust manifold gasket replacement?

A leaking exhaust manifold gasket can reduce engine performance, increase emissions, and allow toxic fumes into the cabin. It may also cause the oxygen sensors and catalytic converter to fail prematurely, leading to costly repairs.

Common signs you need an exhaust manifold gasket replacement

• Loud ticking or tapping noise from the engine bay (especially on cold start)
• Strong exhaust smell inside or around the car
• Reduced engine performance or acceleration
• Decreased fuel efficiency
• Check Engine Light illuminated due to sensor faults
• Visible soot or black marks around the manifold area

What happens during an exhaust manifold gasket replacement?

A mechanic will:

1. Inspect the exhaust manifold and gasket for leaks
2. Remove the exhaust manifold and old gasket
3. Clean and prepare the sealing surfaces
4. Install a new gasket and refit the exhaust manifold
5. Tighten all bolts to the correct torque specification
6. Check for leaks and road test the vehicle

How much does an exhaust manifold gasket replacement cost?

Replacement typically costs $350–$900, depending on the vehicle and accessibility. If the exhaust manifold itself is cracked or damaged, total costs may rise to $1,000–$1,800+.

Is it unsafe to drive with a bad exhaust manifold gasket?

Yes. Exhaust leaks allow toxic gases such as carbon monoxide into the cabin and can damage engine components over time. Driving with this fault is unsafe and the gasket should be replaced as soon as possible.