Toyota 4Runner PCV Valve Replacement | 5th Gen DIY Maintenance

In this video, we walk you through how to replace the PCV valve on a 5th Gen Toyota 4Runner, and explain what it does, why it matters, and how this simple part can save you from expensive repairs.

What is a PCV valve? The Positive Crankcase Ventilation (PCV) valve is a one-way valve that routes harmful engine gases back into the intake to be re-burned—keeping emissions down and oil leaks at bay. Over time, it can clog with oil and sludge, leading to poor fuel economy, rough idle, and even internal pressure that causes oil leaks.

Why replace your 4Runner's PCV valve? It's a key part of routine maintenance Prevents rough idle and poor MPG Helps avoid rear main seal and valve cover leaks Super cheap and easy DIY fix!

This job is beginner-friendly and only requires basic hand tools. We’ll show you where the PCV valve is located, how to remove it, and what to look for in a clogged or failing valve.

Applies to: 2010–2024 Toyota 4Runner (5th Gen) with the 4.0L V6 (1GR-FE)

This is the part we used

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