Elring 707.640 Engine Cylinder Head Bolt Set

Elring Cylinder Head Bolt Set for Mazda Applications

The Elring 707.640 engine cylinder head bolt set is built for Mazda and related compact applications that require an M11 x 1.5 x 122 mm head bolt with a male star drive. It is a direct-fit hardware solution for engine rebuilds and head service on select Mazda Miata, Mazda 323, Mazda MX-3, Ford Escort, and Kia Sephia models.

Key Features

• Elring Part Number: 707.640
• Engine cylinder head bolt set for head fastening service
• Male star bolt head/nut design for proper tool engagement
• Thread size: M 11x1.5x122
• Spanner size: 12 mm
• Engine hardware for Mazda Miata, Mazda 323, Mazda MX-3, Ford Escort, and Kia Sephia applications
• This part cross-references MAHLE GS33556 and 14-55074-01 for the same application.

Detailed Description

Elring 707.640 is an engine cylinder head bolt set specified for select Mazda Miata, Mazda 323, Mazda MX-3, Ford Escort, and Kia Sephia vehicles. The bolt design uses a male star head and an M11 x 1.5 thread pitch with 122 mm length, making it a fitment-specific hardware choice for cylinder head service where the original fastener dimensions must be matched. The Elring 707.640 part number is also referenced by MAHLE GS33556, which helps simplify cross-checking during engine repair planning.

Fits 2003-2005 Mazda Miata, N/A. Fits 1999-2001 Mazda Miata, N/A. Fits 1990-1997 Mazda Miata, N/A. Fits 1988-1989 Mazda 323, N/A. Fits 1990-1995 Mazda 323, N/A. Fits 1986-1987 Mazda 323, N/A. Fits 1993-1996 Mazda MX-3, N/A. Fits 1991-1996 Ford Escort, N/A. Fits 1994-1996 Kia Sephia, N/A.

What This Part Helps Address

• Replacing stretched or worn cylinder head bolts during engine rebuilds
• Restoring proper clamping force after head gasket service
• Correcting fastener mismatch when original head bolts are damaged
• Supporting accurate reassembly on Mazda Miata, Mazda 323, and Mazda MX-3 engines
• Providing the specified thread size and drive style for listed applications

Installation Notes and Tips

Verify the engine code, bolt length, thread size, and drive style before installation. Clean the head and block threads thoroughly, follow the factory tightening sequence, and use the torque procedure specified for the engine. Because this is a fitment-sensitive cylinder head fastener set, confirm the vehicle year and model against the listed applications before assembly. Elring 707.640 should be matched to the exact M11 x 1.5 x 122 mm specification shown for the vehicle.

Quality Assurance

Elring is an established engine sealing and hardware brand used in professional repair environments. This cylinder head bolt set is built to the stated dimensions and application coverage for consistent engine service on the listed Mazda, Ford, and Kia models.