Purchase a Pcv Valve Assembly to Fix Dipstick Pop Out

If your engine's dipstick keeps popping out while you drive, you're dealing with a crankcase pressure problem that won't fix itself. One of the most effective solutions is to purchase a PCV valve assembly that matches your vehicle. A stuck or failing PCV valve is one of the top reasons excess pressure builds inside the crankcase and pushes the dipstick right out of its tube. Ignoring this problem can lead to oil leaks, gasket damage, and bigger repair bills down the road.

Why Does the Dipstick Pop Out in the First Place?

Your engine produces pressure inside the crankcase as a natural byproduct of combustion. Some combustion gases slip past the piston rings this is called blowby. The PCV (Positive Crankcase Ventilation) system is designed to route those gases back into the intake manifold so they can be burned safely. When the PCV valve gets clogged, stuck shut, or fails, that pressure has nowhere to go. It builds up and pushes against anything in its path including your dipstick.

If you're new to this issue, our article on what causes the oil dipstick to pop out from high crankcase pressure breaks down the full list of reasons this happens and how blowby plays into it.

What Does a PCV Valve Assembly Actually Do?

The PCV valve assembly is a small but important part of your emissions and ventilation system. It typically includes the valve itself, a grommet or seal, and sometimes a hose or fitting. The valve opens and closes based on engine vacuum, allowing gases to flow out of the crankcase and into the intake. When it works correctly, crankcase pressure stays low and stable.

When it doesn't work, pressure climbs. You might notice your dipstick popping out, oil seeping from seals, or even a rough idle. The valve is cheap, but the problems it causes when it fails are not.

When Should You Buy a PCV Valve Assembly for This Problem?

Not every dipstick pop-out issue means you need a new PCV valve. Before you purchase a replacement, it's worth confirming that the valve is actually the problem. You can do this with a simple test. Our guide on how to test a PCV valve for high crankcase pressure problems walks you through checking whether your valve is stuck or clogged.

You should consider purchasing a PCV valve assembly if:

The valve rattles very little or not at all when you shake it
There's visible sludge, oil buildup, or carbon inside the valve
You can't blow air through it in one direction (or air passes through in both directions)
The rubber grommet or seal is cracked, hard, or doesn't seat tightly
Your dipstick keeps popping out even after cleaning the valve

How to Choose the Right PCV Valve Assembly

Buying the wrong PCV valve won't solve your problem and could make things worse. Here's what to look for:

Match It to Your Exact Vehicle

PCV valves are not universal. They vary by engine size, year, and make. Use your vehicle's year, make, model, and engine code to find the correct part. Most auto parts store websites let you enter your vehicle info and filter results. If you're buying online, double-check the part number against your owner's manual or the OEM part number stamped on your existing valve.

Buy the Full Assembly, Not Just the Valve

Some vehicles use a PCV valve that presses into a rubber grommet in the valve cover. If the grommet is old, cracked, or loose, replacing just the valve won't fix the pressure problem. Buying the full assembly valve plus grommet and any included fittings gives you a better seal and a more reliable fix.

OEM vs. Aftermarket

OEM (Original Equipment Manufacturer) parts are made to the exact specs of your vehicle. Aftermarket parts can work well too, but quality varies. Stick with well-known brands like Dorman, Standard Motor Products, or the OEM brand for your vehicle. Cheap no-name valves may not open and close at the right pressure, which defeats the purpose.

Check Reviews for Your Specific Application

Look for reviews from people who own the same vehicle. A PCV valve that works great on a Ford 5.0 might not be the right fit literally or functionally for a GM 3.8. Application-specific feedback matters more than overall star ratings.

Common Mistakes People Make When Buying a PCV Valve Assembly

Buying based on price alone. The cheapest valve on the shelf might not match your engine's vacuum specs. A valve that opens at the wrong pressure can still let crankcase pressure build up.
Skipping the grommet. Old, hardened grommets don't seal properly. Even a brand-new valve won't work right if the grommet is letting pressure escape around it.
Not addressing the root cause. A bad PCV valve can be a symptom of excessive blowby from worn piston rings. If your engine is burning oil or has high mileage, the PCV valve fix might only be a temporary improvement. Run a full crankcase pressure diagnosis to understand what you're dealing with.
Ignoring the hose. If your PCV system uses a hose between the valve and the intake, check it for cracks, collapse, or clogging. A restricted hose can cause the same pressure buildup as a bad valve.

How Much Does a PCV Valve Assembly Cost?

Most PCV valve assemblies cost between $8 and $40, depending on your vehicle and whether you go OEM or aftermarket. Some integrated PCV assemblies especially those built into valve covers on newer engines can cost $50 to $150 or more. For most vehicles, this is one of the least expensive engine repairs you can do yourself.

Can You Install It Yourself?

In most cases, yes. On many vehicles, the PCV valve simply pulls out of the valve cover grommet and the new one pushes in. Some engines require removing a hose clamp or a small bracket. The entire job usually takes 10 to 30 minutes with basic hand tools. If your PCV valve is located in a hard-to-reach spot, a pair of pliers and some patience usually do the trick.

After installation, start the engine and listen. The dipstick should stay seated, and you should notice a smoother idle if the old valve was causing issues. Check for any vacuum leaks around the new grommet.

What If a New PCV Valve Doesn't Fix the Dipstick Pop-Out?

If you've replaced the PCV valve and the dipstick still pops out, the problem likely goes deeper. Possible causes include:

Excessive blowby from worn piston rings the PCV system can only handle so much pressure
Clogged PCV passages in the valve cover or intake manifold
A blocked or collapsed PCV hose between the valve and the intake
Other crankcase ventilation issues like a blocked breather element

At this point, you'll want to do a deeper diagnostic. Start by checking the full range of causes behind a dipstick popping out to figure out your next move.

Quick Checklist Before You Purchase

✅ Confirm the PCV valve is actually faulty using a proper PCV valve test
✅ Look up the exact OEM part number for your year, make, model, and engine
✅ Buy the full assembly (valve + grommet + hose if applicable)
✅ Choose a reputable brand OEM or trusted aftermarket like Dorman or Standard Motor Products
✅ Inspect the PCV hose for cracks or clogs while you're working on it
✅ Run a crankcase pressure diagnosis if the dipstick keeps popping out after replacement
✅ Keep your receipt if the part doesn't fit or solve the issue, you'll want easy returns

Tip: After installing the new PCV valve, drive the vehicle for a few days and check the dipstick frequently. If it stays put, you've likely solved the problem. If it pops out again, the root cause is deeper than the valve and needs further investigation before you spend more money on parts.