EMPI 00-4004-0 VW Case Savers - 8mm ID x 12mm OD (Set of 8)

EMPI Case Saver Set – 00-4004-0

The 00-4004-0 Case Savers are a mandatory upgrade for any serious engine builder. Magnesium VW cases are notorious for "pulling" head studs out of the block under high heat or increased compression. These steel inserts provide a much larger surface area and a more durable thread than the original case material.

By installing these, you transition from a weak thread in the soft case to a robust steel-threaded insert. This set is specifically designed for 8mm head studs, which were standard on many later 1600cc dual-port engines and are often preferred by performance builders for their ability to stretch slightly without snapping.

Detailed Vehicle Compatibility

VW Beetle (Standard):

• 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977

VW Super Beetle:

• 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979

VW Karmann Ghia:

• 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974

VW Type 2 Bus:

• 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971

VW Type 3:

• 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973

Product Highlights & Features

• High-Strength Steel: Far more durable than the original magnesium-alloy case threads, preventing future stud failure.

• Large Diameter OD: The 12mm outer diameter spreads the load over a wider area of the engine case.

• Precision Machined: Ensures a perfect 1.25 pitch for standard 8mm Volkswagen head studs.

Technical Specifications

• Part Number: 00-4004-0

• Inside Thread: 8mm x 1.25

• Outside Thread: 12mm x 1.5

• Quantity: 8 Pieces

• Material: Steel

Installation & Maintenance Tips

• Machining Required: Installing these requires the engine case to be bored and tapped to 12mm-1.5. This should ideally be done by a professional machinist to ensure the studs remain perfectly perpendicular to the case.

• Loctite Usage: Use a high-strength, high-temp thread locker (like Red Loctite) when installing the inserts into the case to prevent them from backing out when the head is removed.

• Bottoming Out: Ensure the inserts are installed slightly below the deck surface of the case so they do not interfere with the cylinder seating.