A Guide in Getting a Replacement PCV Valve Diaphragm
Your car's PCV valve diaphragm or cover is a large rubber component of your PCV (Positive Crankcase Ventilation) valve. The system involves an inlet hose that supplies clean air to the engine and a separate inlet filter that cleans the PCV system's incoming air; it creates a slight vacuum that relieves pressure, directs fumes from the crankcase to the engine for burning, and regulates the amount of air flow. Once your PCV valve diaphragm is compromised, oil leaks and severe sludge buildup could occur. And when left neglected, these issues can even lead to more serious problems, so you'd better get a replacement PCV valve diaphragm at once. Read on below to help you get started.
Things You Need to Know Before and When Buying a PCV Valve Diaphragm
- Early Symptoms of Diaphragm Failure: If the diaphragm of your PCV valve fails, you can easily tell it's the case. If you get fault codes about cylinder misfires, if your check engine light is on, or if there's strange intake noises at idle, then your diaphragm might be busted. This is also true if you have a surging, high, or rough idle. Replace your diaphragm when undergoing these symptoms before the sludge and oil leaks happen.
- The Importance of a High-Quality PCV Valve Diaphragm: The problem with going with aftermarket products is that sometimes you could get an incompatible part or a low-grade one. The problem might not be solved by the replacement of your diaphragm because it fails to maintain negative pressure needed to prevent oil leaks and excessive oil consumption by your engine. The semi-flexible material could be rubber or some sort of synthetic plastic.
- The Hallmarks of an Excellent PCV Valve Diaphragm: Your PCV valve diaphragm replacement should not require special tools in order to be installed—it should be easy to install on your own and is a direct replacement for a proper fit with your vehicle. The diaphragm in question should also undergo rigorous inspection to ensure that it's a high-quality product. The proof of such tests is in the pudding, so to speak.
- Replacing Just the Part vs. Getting the Whole Assembly: When getting a replacement PCV valve diaphragm, you need to decide whether you'll get just a replacement part or buy the complete valve cover assembly. Some may tell you that it's easier to buy a complete assembly than just a single part. But that's not always the case since this part is now sold separately online, making it a more practical purchase.
Additional Shopping Tips
You should be eagle-eyed in regards to the specs of the product you're searching for. Check out the material used on the round diaphragm and reviews on its ability to help assist the PCV valve in its job of removing moisture and regulating air flow. Read the reviews on the diaphragm to see customer sentiment on it as well. Going OEM is best if your car is still in warranty when the original diaphragm gets busted. Otherwise, thorough research on your part and mechanic recommendations on cheaper aftermarket parts is your best bet to save money.