Parts for your 2018 Toyota Corolla

Understanding the Role and Care of the PCV Valve in the 2018 Toyota Corolla

The 2018 Toyota Corolla is a reliable and efficient vehicle, well-regarded for its engineering and ease of maintenance. When looking under the bonnet, one component that often comes up in general automotive maintenance is the Positive Crankcase Ventilation valve, commonly known as the PCV valve. Does the 2018 Corolla have this part, and if so, what role does it play? Let's explore.

The PCV valve is a simple but important part found on many internal combustion engines. It helps control the release of harmful gases that build up in the crankcase, which is the housing for the engine's moving parts like the crankshaft and connecting rods. As the engine runs, combustion gases can leak past the piston rings into the crankcase, creating pressure and contaminants that need to be removed. The PCV valve vents these gases back into the intake manifold to be burned off during combustion, reducing pollution and preventing buildup that could harm engine performance.

When referring specifically to the 2018 Toyota Corolla, particularly the models powered by the 2.0-litre Dynamic Force engine or the 1.8-litre engine, it's interesting to note that Toyota uses an integrated PCV system without a traditional, serviceable PCV valve. Instead of a standalone PCV valve located in a valve cover or breather hose, Toyota's design incorporates a valve mechanism integrated into the valve cover assembly or uses a controlled breather system that doesn't require regular service or replacement.

This design choice reflects Toyota's focus on reliability and reducing maintenance needs for owners. The absence of a discrete PCV valve in the 2018 Corolla means there is no separate PCV valve to inspect, clean, or replace during routine servicing. Instead, the system is engineered to operate efficiently over the long term, reducing potential failure points and improving durability.

Why does Toyota opt for this approach? Traditional PCV valves can sometimes become clogged or stick due to the oil vapours and combustion residues circulating through the system. If the PCV valve fails, it can cause problems like increased crankcase pressure, oil leaks, poor fuel economy, rough idling, or even engine damage. Toyota's integrated design minimises these risks by using a component that is engineered to last the life of the engine, provided routine oil changes and engine maintenance are performed.

For 2018 Corolla owners, this means less fuss when it comes to the PCV system. While other car owners might be advised to check or replace their PCV valve every 30,000 to 50,000 kilometres, the Corolla's setup means the PCV mechanism is generally maintenance-free. This contributes to the Corolla's reputation for straightforward, low-cost upkeep and reliability.

That said, although the PCV valve itself does not require direct attention, maintaining the PCV system's function indirectly comes down to good engine care. Regular oil changes using the recommended oil viscosity and grade are crucial. Over time, sludge or deposits can build up inside the engine and related ventilation channels. Fresh oil helps minimise this buildup, ensuring the PCV system continues to work properly and crankcase gases are evacuated smoothly.

If the engine develops oil leaks, unusual oil consumption, or there's a noticeable drop in performance, it's worth having a qualified mechanic inspect the entire ventilation and breather system. Sometimes hoses or passages can become blocked or damaged. However, this is rare in the 2018 Corolla thanks to Toyota's robust design and quality tooling during the manufacturing process.

Additionally, some 2018 Corolla engines use a closed breather system with PCV functionality integrated into the valve cover and intake manifold. This can involve a small valve or membrane fitted inside the engine's cam cover, which is not designed as a user-serviceable part. If any issues arise here, rather than replacing a PCV valve, mechanics typically check for oil leaks or blockages and may replace the valve cover assembly or clean the breather passages during major servicing.

Owners who enjoy doing their own maintenance should note that chances are they won't see a traditional PCV valve sitting there like on older vehicles or other makes. Instead, focusing on routine oil and filter changes, using quality fuel, and adhering to the regular service schedule is the best way to keep the entire ventilation system running optimally. This care reduces the risk of carbon buildup or pressure problems inside the engine.

Overall, the 2018 Toyota Corolla employs an advanced and maintenance-free PCV solution rather than a classic removable PCV valve. This is why you won't hear many Kia or Holden owners talking about swapping out their PCV valve every few years. Corolla owners can enjoy peace of mind that their emission control and crankcase ventilation systems are finely tuned from the factory and built to last with minimal intervention.

So while the PCV valve as traditionally known might not be a headline part for Corolla owners, its job is still happening quietly under the hood. It's just done with a modern twist that helps keep maintenance simple and keeps the Corolla humming along efficiently and cleanly down the road.