SIERRA GM 2.5L / 3.0L Marine Head Gasket Set – 18-1274

Description

SIERRA GM 2.5L / 3.0L Marine Head Gasket Set – 18-1274

Cylinder-head/valve-grind gasket set for Chevrolet/GM four-cylinder marine engines. It groups the principal upper-engine gaskets required when removing and reinstalling the cylinder head for valve work, head service or major top-end repairs.

• Upper-engine/head gasket set
• For GM/Chevrolet marine four-cylinder engines
• Supports cylinder-head and valve-service work
• Covers multiple 2.5L and 3.0L generations
• Verify year and engine casting before installation

For marine engine and drive parts, fitment can vary by serial number, gear ratio, casting, or prior service history. Compare the original part number and physical configuration before installation; replace related gaskets, seals, races or hardware when their condition requires it.

Specifications

• Manufacturer: Sierra
• Part Number: 18-1274
• Application: Chevrolet 153 CID / 2.5L (approximately 1965-1988), 181 CID / 3.0L (1973-1989) and selected 3.0L high-output applications through the late 1990s; verify engine configuration.

Interchange / OEM References

• Mallory 9-61705