Genuine Elring part for BMW Head Bolt Set - 802.700

This set (802.700) is designed for specific BMW models (E34, E32, E28, E24, E23, E12) and Chevrolet models (Chevy Kombi, Chevy Stufenheck). Always verify your vehicle's specifications against the product details.

Head bolts are often torque-to-yield fasteners, meaning they are designed for single use to ensure precise clamping force. It is highly recommended to use new head bolts whenever a cylinder head is removed and reinstalled.

The thread size is M12x1.75x157, and the spanner size (wrench/socket size) required is 19 mm.

You will need a 19mm socket or wrench and, crucially, a calibrated torque wrench to ensure the bolts are tightened to the manufacturer's specifications. A breaker bar might be useful for initial tightening stages.

This set contains 14 bolts, which is the standard quantity required for many compatible engines.

Elring is a German brand known for producing high-quality automotive parts. Specific manufacturing location can vary.

If the thread size, length, and head type match the specifications (M12x1.75x157, 19mm hex head), they are likely compatible. However, it is always best to consult your vehicle's service manual for precise OEM specifications before installation.

Ensure you are using the correct bolt for the correct hole and that the bolt threads are clean and undamaged. Verify the vehicle compatibility. Never force a bolt; clean the threads in the block if necessary.

Ensure you are using a calibrated torque wrench and following the vehicle manufacturer's specified torque sequence. Verify that bolt threads are properly lubricated as per the service manual.

Use a high-quality 19mm socket that fits snugly. Ensure the socket is fully seated on the bolt head. If damage occurs, specialized bolt extractors may be needed.