EMPI Case Saver Insert, 1/2 x 10mm, Bulk, Each

The EMPI 00-4011-7 is a single 1/2 x 10mm case saver insert, packed in bulk, used to repair a stripped or worn cylinder head stud thread in a VW air-cooled crankcase. A case saver is a threaded insert. The case is drilled and tapped to accept the insert's larger outside thread, and the stock-size head stud then threads into the insert. In EMPI's 1/2 x 10mm size, the inside thread is 10mm-1.5 for the stud and the outside thread is 1/2-20 for the case. Because the insert spreads the load over a larger thread in the case, it gives the stud more hold than the worn case threads it replaces.

Buying one insert makes sense when a single stud hole has pulled and the rest are sound. EMPI also packs this size as a set of eight, 00-4011-0, for a case with several damaged holes. The other 10mm size, 00-4012-0, has a 14mm-2.0 outside thread. That is larger than 1/2 inch (about 12.7mm), so it removes more case material, and your machinist's tooling usually decides which one gets used. Head studs often get replaced at the same time; EMPI's 10mm chromoly case stud kits for dual port heads are 00-4009-0 (stock length) and 00-4010-0 (1/2 inch longer). For a quick repair without machining, EMPI also makes a self-tapping 10mm lower stud for 1500–1600cc engines, 00-4025-0.

Technical Details

• Manufacturer: EMPI
• Manufacturer part number: 00-4011-7
• Type: case saver insert
• Size: 1/2 x 10mm
• Inside thread: 10mm-1.5 (EMPI's specification for this size)
• Outside thread: 1/2-20 (EMPI's specification for this size)
• Sold as: each, bulk

Fitment & Compatibility

For VW air-cooled crankcases with 10mm-1.5 head studs. The engine must be disassembled and the case machined to install a case saver, so this is a teardown job. Check your stud thread first, because cases with 8mm studs need EMPI's 8mm inserts.

Common Questions

Can I install this without splitting the case?
No. EMPI states the engine must be disassembled and the case machined.

Is this one insert or a set?
One insert. The set of eight in this size is 00-4011-0.

PMB Performance can help you plan head stud repairs during an engine rebuild.