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Air Bypass Valve Guides

Tips on Buying an Air Bypass Valve

It may seem an unlikely chance for your filter to be dipped in water, especially if you travel mostly on dry places. But that's not enough reason for you to feel certain that it will never happen. Getting an air bypass valve for your car somehow gives you peace of mind that in case your filter submerges in water, your engine will still be secured. Here are a few things to consider before purchasing your very own air bypass valve.

Check the piping of your vehicle.

Some vehicles have long intake pipes while others have very short piping. These factors may greatly affect the performance of the air bypass valve, because the positioning of the valve is of utter importance for it to work perfectly. Knowing these details will make it a lot easier for you in finding a valve that will fit your car into a T.

Forced induction system vs. cold air induction system

There are air bypass valves that are not meant for vehicles with forced induction systems. Some valves are specifically made for cold air induction systems. So make sure that before you purchase the air bypass valve you're eyeing, it is compatible with the system on your car. You would not want to spend money on something you can't use.

Brand-specific valves

If you have an intake manufactured by a different brand from that of the air bypass valve you are considering, inquire first if that valve will still fit into the intake that you have. You'd also have to make sure that the difference between the brands of the intake and the air bypass valve will not be an issue with regards to the performance of the valve. They need to be compatible to avoid damages on the valve or on the engine.

Installing the Air Bypass Valve

Your car's engine can only deal with air-fuel mixture. And so when water gets in it, you'd have to be the one to deal with that trouble. But you can always opt for a preventive measure. Why not install an air bypass valve into your vehicle? This valve will then take care of eliminating the likelihood of your engine sucking in water in case your inlet pipe submerges in water.

Difficulty level: Difficult

Tools that you'll need:

  • Jack and jack stands
  • Template paper
  • Band saw or hacksaw
  • Deburring knife
  • Rag or paper towel
  • Lubricant

Step 1: Park your car on a level surface. Let it cool down if you have run the engine in the past two hours.

Step 2: Disconnect the negative battery terminal. Jack up your car, and secure it with jack stands.

Step 3: Place the air bypass valve as high as possible on the straight section of the inlet pipe. Wrap the template paper around this spot, and use a clear tape to hold it on the pipe. This will serve as a guide for you in cutting the pipe.

Step 4: Remove the inner splashguards and then the air filter. Undo the hose clamps at the throttle body. Take out the inlet pipe.

Step 5: Cut the inlet pipe on both sides of the template. Deburr the ends of the pipe, making sure that there are no sharp edges or loose pieces. Clean the inside of the pipe.

Step 6: Lube the interior surface of the air bypass valve. Slide the valve on one end of the inlet pipe. Install one hose clamp, and tighten it. Do the same thing to connect the other half of the pipe to the valve.

Step 7: Put the inlet pipe back into the vehicle. Install the air filter and then the plastic splashguards. Secure the hose clamps at the throttle body.

Tips and warnings

  1. If your vehicle has never had a cold air system (CAS) installed on it before, do not cut the inlet pipe. The CAS should be installed first for the air bypass valve to have a good mounting location.
  2. Don't place the air bypass valve between the throttle body and pipe because your vehicle's performance might get affected.
  3. You may also use solvent in cleaning the inlet pipe, but be careful not to make it touch the pipe's painted surface. There are solvents that could blister or strip the paint.
  4. Make sure that you do not tighten the hose clamp too much. An over-tightened clamp may cause the valve to malfunction.
  5. You may readjust the inlet pipe if it comes into contact with other components.

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