Sierra 18-0680 Exhaust Manifold Gasket, Replaces 912164, Pack of 2

The Sierra 18-0680 Exhaust Manifold Gasket is a replacement gasket engineered to seal the exhaust manifold joint on inboard and sterndrive engines, sealing against exhaust gas and coolant leakage at the manifold mating surface. It is built to meet or exceed the quality of the original equipment part it replaces, giving installers a dependable seal without the premium of a dealer-sourced OEM part. The gasket is round in shape and finished in white, and it ships as a pack of 2, which covers a typical single-manifold replacement or gives a spare on hand for a future service. Because exhaust manifold gaskets are compression-sealed and exposed to repeated heat cycling, they are a wear item that should be replaced any time the manifold is removed for service, rather than reused. This gasket carries the Sierra part number 18-0680 and directly replaces OEM number 912164, making it straightforward to identify against the number stamped on or referenced for the original gasket being removed. At 0.03 pounds, it is a lightweight, low-cost component that is inexpensive insurance against exhaust leaks compared to the labor cost of re-pulling a manifold to fix a failed seal.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-0680
• Product Type: Exhaust Manifold Gasket
• Package Quantity: Pack of 2
• Color: White
• Shape: Round
• Weight: 0.03 pounds
• UPC: 808282105938

Replaces (OEM)

• 912164

Frequently Asked Questions

What does the Sierra 18-0680 gasket fit? The 18-0680 is an exhaust manifold gasket that seals the manifold mating joint and directly replaces OEM number 912164.

Is OEM part number 912164 the same as the Sierra 18-0680? Yes, Sierra 18-0680 is the direct replacement for OEM number 912164, so it can be ordered in place of that original part.

How many gaskets come in one package of 18-0680? Each package of the 18-0680 contains 2 exhaust manifold gaskets, enough for a manifold replacement plus a spare.

What color is the 18-0680 exhaust manifold gasket? The 18-0680 gasket is white in color and round in shape.

How much does the Sierra 18-0680 gasket weigh? The 18-0680 exhaust manifold gasket weighs 0.03 pounds.

Can I reuse an old exhaust manifold gasket instead of buying the 18-0680? No, exhaust manifold gaskets like the 18-0680 are compression seals meant for one-time use; reusing a removed gasket often leads to leaks since it has already been crushed to seal the original joint.

Is the Sierra 18-0680 genuine OEM or aftermarket? The 18-0680 is a Sierra-brand replacement gasket built to meet or exceed the original equipment part it replaces, rather than being sourced from the original engine manufacturer.

What is included when I order the 18-0680? An order of the Sierra 18-0680 includes a package of 2 exhaust manifold gaskets.

Why does an exhaust manifold gasket need replacing? Exhaust manifold gaskets like the 18-0680 are subjected to repeated heat cycling and compression, which over time causes them to lose their seal and allow exhaust or coolant leakage at the manifold joint.

Does the Sierra 18-0680 gasket handle exhaust manifold heat cycling? Yes, the 18-0680 is designed as an exhaust manifold gasket, meaning it is built to seal against the repeated heat exposure at the manifold joint.