Need to change you car engine air intake boot or air intake tube? We are a team of ASE certified
mechanics that have created this guide to help you save money when doing the job
yourself or at least see what you are paying for when having the job done. Let's
jump right in.
The air intake tube and boot is used to connect the air filter housing and mass air flow
sensor to the throttle actuator or body. This rubber like part is
attached using simple hose clamps. Replacing the boot takes about 15 minutes
using everyday tools.
What Goes Wrong?
This boot is usually made of flexible rubber and over time and vibration
created from the engine coupled with natural degradation of the rubber can cause small cracks
which allow air to be pulled into the engine that was not filtered nor accounted
for by the MAF which feeds back information to the ECM computer. This unmetered air can cause:
Extended crank time
Poor gas mileage
High or low engine idle
Check engine light
Failed smog test
Crank and not start (unless foot is on the gas pedal slightly)
Stall while turning the vehicle right or left
If you don't have the replacement parts or tools to do the repair job we will
show you how to get the best parts and deals at the end of this guide. You
shouldn't need to raise the car in the air so this job is pretty easy and can be
done by most people. Raise the hood and allow the engine to cool before
Let's Fix It!
Begin with the car on level ground, engine off, in park with the parking brake set.
Step 1: Locate and Remove
Using a screwdriver or a small socket and ratchet loosen the clamps that secure the boot
or tube to the air cleaner housing and the
throttle body by turning the clamp screws counterclockwise. There maybe an mass
air flow sensor involved depending on the design of the engine.
Engine breather tubes maybe connected to the boot/tube which is used to
ventilate the engine
crankcase gases into the intake system to be re-consumed by the engine
combustion process. These tubes are held in place by a plastic clip. Use a small
screwdriver or pick to lift upward the fastener which will enable you to remove
Sometimes the boot can be stuck on the intake tube or air cleaner housing due
to heat from the engine and pressure of the clamp. Use a screwdriver or pick to
help break the seal and while use a twisting motion help loosen the seal to
remove one end of the boot.
Once the mounting clamps and breather
hoses are removed and loosened completely remove the boot or tube. Inspect the area
between the ribs by flexing it and looking for signs of rips or tears. If these
imperfection are found replacement is required. Keep track of all clamps, nuts and bolts in a container so they don't get misplaced.
Step 2: Installing the New Boot
Match the new boot to the old unit, they
should match up identically. Reinstall mounting clamps onto the new boot or
tube. Take note of the clamps orientation which will make installation much easier.
While holding the new boot firmly with one hand and making sure the clamps do
not fall off reinstall the new air intake boot onto the throttle
actuator first. Be sure not to get any dirt into the area during the
Finish by installing air intake tube by fitting the boot end on the tube onto
the air filter housing or mass air flow sensor while tightening the clamps snugly, do
not over tighten. Some tubes will have an orientation tab which must be fitted
into its proper slot. Start the engine and listen for any vacuum leaks or
hissing sounds which would be an indication of the boot lip being folded under either on the throttle actuator or the air filter housing.
This is what a failed intake tube looks like. Please continue by watching both
videos below to get an idea on what you are in for when doing these kinds of
Thank you for reading through the guide please watch the videos below before
you begin the repair.
Air Intake Boot Replacement Video
Air Intake Tube Replacement Video
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