Mahle GS33221 Engine Cylinder Head Bolt Set

Engine Cylinder Head Bolt Set for Ford and Mazda

The Mahle GS33221 engine cylinder head bolt set is an OEM-standard fastening solution for select Ford and Mazda applications. Built with steel construction and a Torx 55 head, it is specified for engines that require precise clamping force and reliable head retention.

Compatible with 1986-2000 Ford Ranger, 1991-2000 Ford Explorer, 1990-1997 Ford Aerostar, 1986-1990 Ford Bronco II, 1994-2000 Mazda B4000, and 1991-1994 Mazda Navajo, this Mahle GS33221 set supports common cylinder head service work on these platforms.

Key Features

• OEM-standard engine cylinder head bolt set
• Steel fastener material for engine assembly use
• Torx 55 head style for proper tool engagement
• M12 bolt diameter with 1.75 mm pitch
• Maximum length of 87 mm
• Washers not required

Product Details

Mahle GS33221 is engineered as a direct-fit cylinder head bolt set for service on select Ford and Mazda engines. The fasteners use an OEM-standard design with a Torx 55 head style, which helps provide consistent torque application during cylinder head installation. Mahle is known for sealing and engine hardware products used by OEMs and technicians worldwide, and this part follows that service-focused approach.

This part cross-references FEL-PRO ES 72794 for the same application. The Mahle GS33221 part number is also commonly referenced in cylinder head bolt replacement searches for Ford Ranger, Ford Explorer, and Mazda B4000 engine repair.

What This Part Helps Address

• Damaged or stretched cylinder head bolts during head gasket service
• Loss of proper cylinder head clamping force after engine teardown
• Fastener replacement needs during overheating-related repairs
• Head bolt service on Ford Ranger, Ford Explorer, and Mazda B4000 engines
• Torque retention concerns when reassembling the cylinder head

Installation Notes and Tips

Verify engine code and fastener specifications before installation. Clean bolt holes thoroughly, follow the factory torque sequence, and use the correct Torx 55 driver to avoid fastener damage. Always compare the removed hardware to the new bolts for length, thread pitch, and head style before assembly. For best results, follow the vehicle manufacturer’s service procedure for cylinder head tightening.

Quality Assurance

Mahle supplies engine sealing and hardware products used in OEM and professional repair environments. The GS33221 is built to OEM-standard specifications for the listed Ford and Mazda applications.