How to Replace an Air Intake Hose

The air intake hose is responsible for feeding air into a combustion system. The air intake system is one of the most important parts of a combustion system, as this is where air will flow from the air box or filter to the throttle body and intake manifold of the engine. There should be no leaks or cracks on an air intake hose, as the engine management sensors, such as the airflow sensor, may cause false readings and affect engine performance. It may even show up as a "check engine" light on the instrument cluster of the car.

With that being said, it is relatively important that the air intake hose is cleaned and inspected every time you go for an oil change. This will ensure supreme engine performance for each mile you drive. Here are the steps on how to replace an air intake hose.

Materials Needed:

  • Philips head or flat head screwdriver
  • Hand gloves
  • Cotton rag
  • Pliers (optional)

Step 1 – Let the Engine Cool

Turn off the engine and pop open the hood. Wait for the engine to cool for at least 30 minutes. It would be best to replace the air intake hose with a cool engine, preferably in the morning before you start your car. This will help protect your hands from heat burns or scars caused by touching hot engine parts. Wear safety gloves as an added measure of protection.

Step 2 – Unscrew the Air Hose Clamp

Get a Philips or flat head screw driver and locate the air intake hose clamp on the throttle body side of the engine. Turn the screw head counterclockwise to loosen the clamp. Try to turn the air intake hose lightly in opposite directions before pulling the air intake hose from the throttle body. It may be difficult at first, especially for older model cars, as the rubberized hose may have slightly melted into the metal, but a little elbow grease should do the job. Be reminded that certain engine sensors might be planted on the air intake hose. Unplug the sensor or electronic device and remove accordingly.

Next, unscrew the clamps on the side of the air box using a Philips or screwdriver as well. Turn the screw head counterclockwise to loosen and remove the air hose. Set the old air intake hose aside.

Step 3 – Inspect New Air Intake Hose

The air intake hose will follow a specific shape according to the specifications of your car, so make sure that the new intake hose is of the same shape and size as the old one. Remove the clamps from the old intake hose and insert on both ends of the new intake hose. Attach the new intake hose on the air box first before proceeding to attach on the throttle body side. Make sure to fully insert the air intake hose before turning the clamps on both ends. Tighten the clamp with a Philips or screwdriver by turning clockwise. Do not over tighten to avoid premature wear on the air hose.

Remember to buy the right kind and size of air hose that is specific to the engine model of your car. This will ensure that the procedure is done properly without the hassles of modifying the fitment of the air hose. It will result in a clean and more organized engine compartment as well.