What is the intake manifold and how much does it cost to change it

Here we will learn what is intake manifoldwhat does it do and how much is the cost of its repair or change.

What is an intake manifold?

The intake manifoldIt serves to distribute the air to the engine cylinders and in almost all vehicles it contains the fuel injectors.


See also: What is the turbocharger and how does it work?

On older car models without fuel injection or with throttle body injection, The manifold takes the air-fuel mixture from the carburetor/throttle body to the cylinder heads.

The manifold allows air to enter the combustion chamber on the intake stroke, to mix with the fuel from the injector and continue the combustion cycle.


The air filter does not allow dust and foreign bodies to pass through, which would damage the engine, so it must be constantly removed.

They are usually made of aluminum or cast iron, although some car models use plastic manifolds.

An intake manifold can split and cause a leak. If you lift the hood and listen to the engine when idling, you may feel a small hiss, which will cause the idle to stop abruptly.


It is easy to replace a intake manifold in a modern vehicle as the parts are easily located unlike older units.

Old car parts will have to be found in junkyards, in wrecked cars, through eBay or premises specialized in car parts.


If the spare part is not available, external modifications are valid but costly. These manifolds are designed to improve airflow at lower engine speeds.


Fee at Mechanic: $300-$1,100

  • Parts: $200-$600
  • Labor: US$100-US$500

replace a intake manifold It takes at least two to four hours to make, though it varies by brand.

DIY Cost: $200-$600

  • Difficulty level: Advanced
  • Required parts:
    • i take multiple
    • Intake manifold bolt set
    • Intake Manifold Gasket Set

Intake manifolds are usually made of iron which makes them expensive, however some are made of plastic as well.


What happens if you don’t replace your intake manifold?

If the part is damaged or worn, it should be replaced immediately. A faulty manifold for some reason allows air in without going through the intake system, thus it will not create the proper air/fuel mixture. Causing misfires and engine damage.

How do I know when to replace the intake manifold?

  • check engine light
  • Engine stalls or fails
  • Oil or coolant leaks
  • Illuminated check engine light
  • rough idle
  • Unpredictable engine performance
  • poor gas mileage
  • You can use the FIXD sensor and the app to
  • P0300: Multiple Random Misfires Detected
  • P0170: Fuel Trim
  • P0173: Fuel Trim
  • P2282: Air Leak Between Throttle Body and Intake Valves

So you must:

  • Replace engine air filter
  • Change engine coolant
  • Change the oil
  • Replace spark plugs


Writing by Gossipvehiculos/Sources:

About Alicia Peters

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