How To Replace a PCV Valve

Positive Crankcase Ventilation (PCV) valves are one-way valves on a car’s engine crankcase. A PVC is located in a system that has the valve and an intake breather hose as parts. The PCV valve maintains emission controls for the engine.

A PCV valve clogs with sludge whenever you don’t get car oil changes at certain intervals. Sludge is oil kept too long in a place and has become a solid-like substance. The car’s emission controls would not function normally once this happens. Signs of a ruined PCV valve are poor idling, slow car acceleration, gas mileages loss, power loss and other problems. If you haven’t had an oil change and your car gave off a sloppy performance, this means that your PCV valve might need changing.

Replacing the PCV valve is not an easy task, but it is not that difficult either. This task is easier to pull off on a hot day with a hot engine, since every part would start to loosen up and be flexible. Here are the steps on replacing a PCV Valve:

  1. Before replacing anything, you should know what it looks like and where you can locate it. As mentioned, the crankcase holds the valve. The PCV valve looks like a small plug (commonly made of plastic) usually placed on the upper half of your engine.
  2. After locating the PCV valve, remove obstructions (such as clutch cables) if they are present. This ensures that you will not damage any other parts, and that you will be able to work on the valve without anything getting in the way.
  3. What you want to do now is to loosen the hoses connected to the valve. To do this, get angled nose pliers and start off by loosening the upper hose first. Do not grasp the hose too hard or you might ruin the metal stub.
  4. After disconnecting the upper hose, grasp the PCV valve firmly with the nose pliers, and yank it out. The purpose of the ‘do these on a hot day’ situation mentioned above is that the valve will be harder to pull out if the engine is in a cold condition.
  5. Detach the remaining upper hose to fully detach the valve. The hole left by detaching the PCV valve is the lower hose. Clean this part to ensure that the replacement valve will be free from any obstructions. Make sure that no dirt will drop off inside the hose.
  6. You are now ready to install the new PCV valve into the gaping hole. You can start off by having the part for the upper hose placed first. This is much easier now than when you needed to remove the part. Note: do not use silicone to grease the valve. Use your preferred motor oil as a greasing substance.
  7. Remember to place back the obstructions said earlier, and do not over-screw them, so that they would still work efficiently.

Now you already have a new PCV valve on your engine. Remember to change oil on timely intervals to prevent damage to your valve.


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