Exhaust Manifold Replacement cost in Laguna Niguel in 2023

The average cost for an exhaust manifold replacement is $815 and the range is generally between $32 and $1023.

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Exhaust Manifold Replacement costs by shop in Laguna Niguel.

CarAdvise Customers save an average of $163 on Exhaust Manifold Replacement.


Average cost of Exhaust Manifold Replacement for popular vehicle models in Laguna Niguel:

THE IMPORTANCE OF Exhaust Manifold Replacement

What is an exhaust manifold and how does it work?

An exhaust manifold is a component of the exhaust system on a vehicle. It is located between the cylinder head of the engine and the rest of the exhaust system and collects exhaust gasses as they exit the engine.

Any internal combustion engine produces exhaust gasses. These gasses are extremely hot - upwards of 1,000 degrees Fahrenheit - and harmful to humans and the environment. They contain unwanted byproducts of combustion, such as carbon monoxide, hydrocarbons, and nitrogen oxides.

The exhaust system directs these gasses away from the vehicle occupants while suppressing the extreme noise caused by the engine. The first component in the exhaust system is the exhaust manifold, which is a large metal chamber or collection of chambers that bolts directly to the cylinder head of the engine where the gasses escape during the exhaust stroke of each cylinder. The manifold collects the exhaust, sends it to the catalytic converter located downstream in the system, through a long pipe to the muffler, and out of the tailpipe.


How do I know if my vehicle needs a new exhaust manifold?

The exhaust manifold is a pretty durable component in the exhaust system. It does not regularly go bad. But it is subject to a lot of heating and cooling. It is not unheard of for an exhaust manifold to crack. Signs that your vehicle might need a new exhaust manifold include the following:

Excessive engine noise coming from the front of your vehicle

Tapping sound coming from the engine

Smoke originating in the engine compartment

The smell of exhaust fumes near the front of the vehicle


How does a technician perform Exhaust Manifold Replacement ?

Replacement of an exhaust manifold on many vehicles, especially those with transverse (sideways) mounted engines (most vehicles with front-wheel drive), can be challenging. One reason is that the bolts that hold the manifold in place, not to mention the other hardware tied to the exhaust system, tend to collect corrosion and are difficult to remove. Another reason the job can be complicated is that there are many other components that need to be removed for access to the exhaust manifold.

In order to replace the manifold, a technician must decide whether it is simpler to remove a number of components and still wrestle with the manifold mounting bolts or remove the entire engine. That decision might come down to the specific vehicle make and model, as well as the preference of the technician.

At the very least, engine covers, exhaust pipes, and heat shields must be removed. Coolant lines, filters, hoses, alternators, AC components, and other parts might also need to be removed. Care must be taken with the mounting bolts to prevent breakage inside the cylinder head, otherwise the engine might need to be partially disassembled in order to repair the damage.


What causes exhaust manifold failure?
The most common reason that an exhaust manifold might fail is thermal stress. Exhaust manifolds are tough. They are usually made of stainless steel or cast iron. But years of heating up and cooling down over and over again can sometimes cause the metal to crack. It is more common, however, for a manifold gasket to fail than for the manifold itself to go bad.
Can I drive with an exhaust manifold leak?
You can drive with an exhaust manifold leak. However, it can lead to problems. Besides the excessive noise that your engine can produce with an exhaust leak, the presence of carbon monoxide in the engine compartment not far from the cabin air intake can be dangerous. An exhaust manifold leak can also cause problems with your engine. You might see the check engine light come on if the manifold is bad.
Will a bad exhaust manifold throw a trouble code?
A bad exhaust manifold itself might not throw a diagnostic trouble code, but excessive oxygen in the exhaust can be sensed by the O2 sensors, which will signal the vehicle’s computer to display the check engine light and store a trouble code.

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