A Guide to the 2012-2017 Toyota Highlander Engine Valve Cover Gasket Set
Leaking valve cover gaskets are a common issue as these Highlanders age; here's what you need to know to fix the problem correctly.
- A burning oil smell is the most common sign of a failing valve cover gasket on a 2012-2017 Highlander.
- On V6 models, the rear gasket is much harder to replace than the front; it's recommended to replace both at the same time to save on future labor costs.
- While budget brands are available, investing in a premium aftermarket gasket set from a brand like Beck Arnley or Victor Reinz is wise, given the labor involved.
- While you are performing the repair, it is a good time to also replace spark plugs, the PCV valve, and intake manifold gaskets (on V6 models).
Is Your Highlander's Valve Cover Gasket Failing?
As the 2012-2017 Toyota Highlander gets older, the rubber valve cover gaskets get hard and brittle from constant heat. This is a normal wear-and-tear item. When the gasket can no longer create a tight seal, oil begins to seep out. Ignoring a leak can lead to bigger problems, so it's important to recognize the signs of failure.
🎬 Watch this video to see common signs of a failing gasket.Key Symptoms of a Leak
- Burning Oil Smell: This is the most common symptom. Oil drips from the valve cover onto the hot exhaust manifold below, creating a distinct and unpleasant burning smell that you may notice inside or outside the vehicle, especially after it's warmed up.
- Visible Oil Residue: You may see wet, oily dirt and grime collecting on the valve covers at the top of the engine. In more advanced leaks, you might see oil trails running down the side of the engine block.
- Smoke from Engine Bay: If the leak is significant, you might see light smoke coming from under the hood when the engine is hot as the oil burns off the exhaust.
- Low Engine Oil: A leaking gasket can cause a gradual loss of engine oil, potentially triggering the low oil warning light on your dashboard between oil changes.
- Engine Misfires: The gasket set includes spark plug tube seals. When these fail, oil can leak into the spark plug tubes, fouling the spark plugs and ignition coils. This can cause the engine to run rough, hesitate, and may trigger the check engine light.
V6 vs. 4-Cylinder Engines
Your Highlander has either a 4-cylinder (1AR-FE) or a V6 (2GR-FE) engine. The V6 is more common and has two valve covers: one in the front (Bank 2) and one in the back near the firewall (Bank 1). The rear gasket is much more difficult to replace because the intake manifold must be removed for access. 🎬 See expert tips for navigating the V6 engine's valve covers. The 4-cylinder engine has only one, more accessible valve cover.
Choosing the Right Aftermarket Gasket Set
You don't need to buy the expensive OEM part from a Toyota dealer. Several reputable aftermarket brands offer high-quality gasket sets that meet or exceed original specifications. For a critical sealing component like this, it's best to avoid the absolute cheapest options and stick with trusted names.
- Premium Aftermarket (OEM-Equivalent): Brands like Beck Arnley and Victor Reinz (Reinz) are well-regarded in the industry. Beck Arnley is known for sourcing parts from various manufacturers, sometimes even providing the original OEM part in their own box. Victor Reinz is a major OEM supplier for many car brands, and their gaskets are known for excellent fit and durability.
- Quality Aftermarket: This tier offers a good balance of quality and price. These gaskets are reliable for daily driving and are a significant step up from budget parts.
- Budget-Friendly: Brands like Apex fall into this category. While they offer a low price point, reviews can be mixed and long-term durability may not match premium brands. For a job like the rear valve cover on a V6 Highlander, which requires significant labor, spending a little more on a premium gasket is a wise investment to avoid doing the job twice.
Cost Comparison for 2012-2017 Highlander Valve Cover Gasket Replacement
| Item | Estimated Cost |
|---|---|
| New Aftermarket Gasket Set | $22.65 - $54.62 |
| New OEM Gasket Set | $74 - $79 |
| Shop Labor | $467 - $685 |
| Total Professional Replacement (V6) | $541 - $1,135+ |
Note: Labor costs can vary significantly based on your location and whether you have the 4-cylinder or V6 engine. The V6 is more expensive due to the added complexity of removing the intake manifold to access the rear cover.
Frequently Asked Questions
Do I have to replace both valve cover gaskets on my V6 Highlander at the same time?
It is highly recommended. The gaskets are made of the same material and have been exposed to the same heat and age. If one is leaking, the other is likely not far behind. Since replacing the rear gasket requires removing the intake manifold, it is much more labor-intensive. Replacing both at once saves you from having to pay for that same labor again in the near future.
Is this a difficult job to do myself?
For a 4-cylinder engine, the job is straightforward for a DIY mechanic with basic tools. For the V6 engine, replacing the front gasket is also manageable. However, replacing the rear gasket is significantly more complex due to the need to remove the upper intake manifold and work in a tight space against the firewall. This is best left to experienced DIYers or a professional mechanic.
Are there any recalls or TSBs for this issue?
Searches for the 2012-2017 Highlander did not show any specific recalls or Technical Service Bulletins (TSBs) for valve cover gasket leaks. This type of leak is generally considered a normal maintenance issue due to the age and heat cycles the gaskets endure. Later model Highlanders (2020-2022) do have a technical tip related to valve cover leaks, but this does not apply to the 2012-2017 generation.
What else should I check when doing this repair?
While the valve cover is off, inspect the PCV valve and its grommet for wear and consider replacing them. For V6 models, you will need a new intake manifold gasket. It's also the perfect time to replace your spark plugs, especially if you found oil in the tubes. 🎬 Learn how to replace gaskets when oil leaks into spark plugs. Finally, a small amount of FIPG (Form-in-Place Gasket) sealant is required at the sharp corners where the timing cover meets the cylinder head.
Helpful Videos
Technical Specifications
OEM Part Numbers: 11213-31050 11214-31020 11193-70010
Fits 2012, 2013, 2014, 2015, 2016, 2017 Toyota Highlander models with the 2.7L 1AR-FE 4-cylinder or 3.5L 2GR-FE V6 engine. Gasket sets should include the main valve cover gasket(s), spark plug tube seals, and bolt grommets.
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.
- Toyota Highlander: