Mahle 1178BS Engine Cylinder Head Gasket

Mahle 1178BS Cylinder Head Gasket

The Mahle 1178BS is a steel engine cylinder head gasket built for performance-focused sealing in a wide range of Chevrolet, GMC, Cadillac, Pontiac, Buick, and Oldsmobile applications. It is engineered for engines with a 4.10 in. cylinder bore diameter and a 0.04 in. thickness, helping maintain a precise seal under demanding operating conditions.

Key Features

• Steel construction for durable cylinder head sealing
• 0.04 in. thickness for accurate gasket fitment
• 4.10 in. cylinder bore diameter
• Performance grade type
• No gasket sealant included
• Mahle sealing technology trusted by OEMs and technicians

Product Details

Mahle 1178BS is an engine cylinder head gasket for applications that require a beaded steel sealing design. It is listed across a broad range of GM vehicles, including Chevrolet Express 1500, Chevrolet Tahoe, GMC Savana 2500, and Cadillac Escalade, along with classic platforms such as Chevrolet Camaro, Pontiac Firebird, and GMC Jimmy. This part cross-references FEL-PRO 7733SH-1 for the same application.

Use Mahle 1178BS when replacing a cylinder head gasket on compatible Chevrolet C1500, GMC K1500, or Chevrolet Corvette applications where the specified bore and thickness match the engine build. The part number 1178BS is also useful when matching OE-style service references during engine repair.

Common Problems This Part Can Address

• Coolant or combustion leakage at the cylinder head sealing surface
• Compression loss between the cylinder head and engine block
• Oil seepage caused by a worn head gasket seal
• Sealing issues after cylinder head service or engine teardown
• Replacement needs on engines requiring a steel performance gasket

Installation Notes and Tips

Confirm cylinder bore diameter, gasket thickness, and engine code before installation. The fitment notes specify cylinder head bolt replacement recommended, so inspect fasteners and follow the service procedure for the engine being repaired. Clean both mating surfaces thoroughly and verify head and block flatness before assembly.

Quality Assurance

Mahle gaskets are used by OEMs and technicians worldwide for engine sealing applications. The 1178BS is a steel, performance-grade cylinder head gasket built to meet the demands of service and rebuild work across the listed GM fitments.