Cometic Gasket

Fits BMW 318 and Z3 1989–1998 with 85mm Bore

Part #: C4348-120

Overview

The Cometic BMW 318 and Z3 MLS Head Gasket is a high-performance replacement designed specifically for engines with an 85mm bore, covering models from 1989 to 1998. Crafted from multiple embossed layers of stainless steel, this gasket features a durable Viton rubber coating on the outer layers, ensuring a reliable seal under demanding conditions. Its compressed thickness of 0.120 inches makes it suitable for high-output engines, providing excellent sealing performance without the need for additional sealants. This gasket is ideal for enthusiasts and professionals seeking a durable, high-quality solution to maintain engine integrity and prevent leaks during rebuilds or performance upgrades. Designed to withstand the shearing forces created by different materials in the engine, the MLS (Multi-Layer Steel) construction offers increased strength and resilience. It is compatible with both aluminum heads and blocks, as well as cast iron components, making it a versatile choice for a variety of engine configurations. The gasket’s robust design helps maintain proper compression and prevents coolant or oil leaks, supporting engine longevity and optimal performance.

Key Features

This MLS head gasket combines advanced materials and engineering to deliver dependable sealing and durability. Key features include:

• Multi-layer steel construction with embossed layers for enhanced strength
• Viton rubber coating for improved sealing and chemical resistance
• Compressed thickness of 0.120 inches for high-performance applications
• Designed for BMW 318 and Z3 engines from 1989 to 1998 with 85mm bore
• Suitable for aluminum and cast iron engine components
• No sealants required, simplifying installation
• Engineered to withstand high shearing forces and thermal expansion

Construction & Design

The gasket’s multilayer steel design features embossed layers that provide structural integrity and flexibility, accommodating engine movement and thermal cycling. The Viton rubber outer layers enhance sealing capabilities, ensuring a tight fit between the cylinder head and engine block. This combination of materials results in a gasket that is both durable and reliable, capable of handling high-performance engine conditions.

Installation & Fitment

Proper installation requires clean mating surfaces and correct torque specifications to ensure optimal sealing. This gasket is designed as a direct replacement for OEM parts on compatible BMW 318 and Z3 models, making it suitable for engine rebuilds, head gasket replacements, or performance upgrades.

Ideal For

This gasket is perfect for automotive enthusiasts, professional rebuilders, and performance tuners looking to restore or enhance engine reliability in BMW 318 and Z3 models from the late 80s to the late 90s. It supports high-output applications and ensures long-lasting sealing performance under demanding conditions.