Engine Valve Cover Grommet Set

What Is an Engine Valve Cover Grommet Set?

Engine valve cover grommet sets are a small but critical component in your engine's sealing system. Valve cover grommets are rubber rings that create a secure seal between the valve cover and the components that pass through or mount to it — including the PCV (Positive Crankcase Ventilation) valve, breather valve, and the cover's own mounting bolts. Without a properly functioning grommet, oil can seep past these openings and onto hot engine surfaces below.

Why Valve Cover Grommets Fail — and Why It Matters

Grommets are made from rubber, and rubber is no friend of heat and age. Over time, the constant thermal cycling of an engine causes these small seals to harden, crack, and shrink. Once a grommet loses its flexibility, it can no longer maintain a tight seal around the PCV valve or the valve cover bolts, allowing oil to leak outward.

The consequences of a failed grommet go beyond a dirty engine bay. Oil leaking onto the exhaust manifold or other hot surfaces can create a burning smell, smoke, and in serious cases, present a fire risk. Low engine oil levels from unchecked leaks can also accelerate engine wear. When you notice oil seeping around your valve cover, the grommets are one of the first things to inspect — and replacing them as a complete set is a smart, low-cost way to restore a lasting seal.

What to Look for When Shopping Valve Cover Grommet Sets

• Correct fitment: Grommet dimensions — inside diameter, outside diameter, and thickness — vary by engine family. Always verify compatibility with your specific year, make, and model before purchasing.
• Material quality: Look for grommets made from durable, oil-resistant rubber or molded compounds engineered to withstand the heat and chemical exposure under the hood.
• Complete sets: Replacing all grommets at once while the valve cover is off saves time and avoids repeat disassembly later.
• Pair with a new valve cover gasket: Since accessing the grommets typically requires removing the valve cover, it's wise to replace the valve cover gasket at the same time for a fully renewed seal.

Top Brands in Engine Valve Cover Grommet Sets

MAHLE is a globally recognized name in OE-quality engine sealing. As a leading global supplier trusted by both OEMs and professional technicians, MAHLE manufactures valve cover grommets to meet or exceed original equipment specifications, using durable, oil-resistant materials precision-engineered to withstand heat and pressure over the long term.

Fel-Pro is widely regarded as one of the most trusted names in replacement sealing products for cars, light trucks, and heavy-duty vehicles. With a history dating back over a century, Fel-Pro brings application-specific engineering to its grommet sets, offering one of the broadest coverage ranges in the category to ensure a reliable, leak-free seal across a wide variety of domestic and import applications.

Federal Mogul is a longtime leader in automotive sealing and engine components, bringing decades of OE supply chain experience to its aftermarket grommet sets. Their products are designed to deliver consistent fitment and durability across a wide range of domestic and import vehicles.

Victor (Victor Reinz) is an original equipment supplier whose gaskets and grommets are engineered to application-specific standards. Victor Reinz grommet sets are manufactured to OEM-or-better quality levels, and each set includes all the components necessary for a complete, hassle-free repair.