Case Savers, for 8mm Stud, 12mm Outer Thread, 8 Pieces

EMPI Case Savers for VW Aircooled Engines - 8mm Stud to 12mm Outer Thread

Product Overview

The EMPI Case Savers (Part #00-4004-0) are essential for restoring stripped threads in Volkswagen engine cases or as a preventative upgrade for high-performance builds. These inserts provide a significantly stronger thread surface than the original magnesium or aluminum case material, ensuring your head studs remain secure under high torque. This kit includes 8 pieces, specifically designed to adapt 8mm head studs into a case machined for a 12mm outer thread.

Fitment and Compatibility

These case savers are compatible with VW Type 1 (Beetle, Karmann Ghia, Thing), Type 2 (Bus), and Type 3 aircooled engines. They are specifically intended for cases using 8mm x 1.25 studs. The outer thread of the insert is 12mm x 1.5, requiring the case to be drilled and tapped to match these dimensions.

Pro Tech Tips

Tip 1: Use a Precision Drill Press. Proper alignment is critical when installing case savers. Because the head studs must be perfectly perpendicular to the case deck, it is highly recommended to use a drill press or a specialized engine case boring jig. Hand-drilling often results in crooked studs, which will prevent the cylinder heads from seating correctly.

Tip 2: Apply High-Strength Thread Locker. To ensure the case savers remain permanently seated even when removing studs in the future, apply a high-strength (red) thread-locking compound to the 12mm outer threads before installation. Ensure the case threads are completely free of oil and grease using a brake cleaner or solvent to achieve a maximum bond.

Tip 3: Meticulous Cleaning Post-Machining. Installing these inserts requires significant metal removal. After drilling and tapping the case, the entire block must be thoroughly cleaned. Use compressed air and an engine degreaser to flush out every oil gallery and crevice. Any remaining magnesium or aluminum shavings can quickly destroy bearings and oil pumps once the engine is started.