A Guide to the Engine Valve Cover Gasket Set for the 2016-2021 BMW M2
If you smell burning oil, it's likely time to inspect the valve cover gasket on your M2's N55 or S55 engine.
- A burning oil smell is the number one sign of a failing valve cover gasket on the M2.
- For a reliable repair, choose an OEM-supplier brand like Victor Reinz or Elring.
- Consider replacing the entire plastic valve cover on higher-mileage cars, as it can warp and cause future leaks.
- While replacing the gasket, also replace the small Valvetronic actuator gasket to prevent future leaks in the same area.
Is Your M2's Valve Cover Gasket Failing?
A leaking valve cover gasket is a very common issue on BMW engines, including the N55 (2016-2018 M2) and S55 (2019-2021 M2 Competition). The intense heat, especially from the turbocharger(s), speeds up the aging process of the gasket. When the gasket fails, oil seeps out and typically drips onto the hot exhaust components below, creating tell-tale symptoms that are hard to ignore.
Key Symptoms of a Leak
- Burning Oil Smell: This is the most common first sign. Oil drips onto the hot exhaust manifold or turbo, burning off and creating a distinct smell that you may notice in the cabin or when you get out of the car.
- Visible Smoke from Engine Bay: When stopped at a light, you might see faint smoke coming from under the hood, especially from the passenger side of the engine.
- Oil on the Engine: If you inspect your engine, you may see wet, dark residue or active oil trails on the side of the cylinder head, particularly on the exhaust side.
- Engine Misfires or Rough Idle: The valve cover gasket set includes seals for the spark plug tubes. When these fail, oil can fill the spark plug wells, fouling the plugs and ignition coils, which leads to a rough idle and a check engine light.
A Note on the Plastic Valve Cover
The original valve covers on both the N55 and S55 engines are made of plastic. With countless heat cycles, this plastic can become brittle or warp over time. If the cover itself is warped, simply replacing the gasket may not create a perfect seal, and the leak could return. For higher-mileage cars or persistent leaks, replacing the entire valve cover assembly is often the most reliable long-term repair.
Choosing the Right Aftermarket Gasket Set
When shopping for a replacement, you'll find different tiers of aftermarket brands. For a critical seal like this, quality matters.
- OEM Supplier Brands (Victor Gaskets/Victor Reinz, Elring): Brands like Victor Reinz and Elring are often the original equipment manufacturers (OEMs) for BMW. This means they produce the exact same part that goes into a Genuine BMW box, but sell it under their own name for less. These gaskets are designed to meet BMW's exact specifications for material, fit, and durability, making them an excellent choice for a reliable, long-lasting repair.
- Value Brands (URO Parts): URO Parts is a budget-friendly aftermarket brand. While the price is attractive, owner and mechanic feedback is often mixed. Some parts perform well, while others may have a shorter lifespan compared to OEM or OEM-supplier parts. For a labor-intensive job like this, saving a few dollars on the gasket itself might be a risk if it fails prematurely and requires doing the job all over again.
Pro Tip: While you are replacing the valve cover gasket, it is highly recommended to also replace the Valvetronic actuator gasket. This is another small, inexpensive seal in the same area that is prone to leaking.
Cost of Replacing the BMW M2 Valve Cover Gasket
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Gasket Set | $24.78 - $83.63 |
| New OEM Gasket Set | $90 - $105 |
| Shop Labor | $561 - $1,525 |
| Total Professional Replacement | $651 - $1,630+ |
Note: Labor costs vary significantly by model year, with 2019-2021 M2 Competition models (S55 engine) being more labor-intensive and therefore more expensive than the 2016-2018 models (N55 engine).
Frequently Asked Questions
Is it safe to drive with a leaking valve cover gasket?
You can drive for a short time with a minor leak, but it's not recommended. The primary risk is fire, as dripping oil can ignite on the hot exhaust manifold or turbocharger. Ignoring the leak can also lead to damage to belts, pulleys, and sensors, and cause engine performance issues.
Is replacing the valve cover gasket a DIY job?
For an experienced DIY mechanic, this job is feasible but time-consuming, often taking 3 or more hours. It requires removing strut braces, ignition coils, and the fuel rail. The rear bolts are difficult to access, and ensuring the new gasket seats correctly without falling out during installation is tricky. If you are not comfortable with this level of work, professional installation is recommended.
Should I just tighten the valve cover bolts?
Some owners have found loose bolts on the valve cover and had temporary success by re-torquing them. However, this is often a temporary fix. The reason the bolts are loose is usually because the gasket has hardened and shrunk with age, reducing its clamping force. The leak will likely return.
Are there any recalls for this issue?
There are no specific recalls for the valve cover or its gasket on the 2016-2021 BMW M2. Recalls for this vehicle have addressed other issues like the rear sub-frame and fuel injectors.
Technical Specifications
OEM Part Numbers: 11127587804
This gasket set fits both the N55 engine (2016-2018 M2) and the S55 engine (2019-2021 M2 Competition). The set includes the main perimeter gasket and the inner spark plug tube seals.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- BMW M2: