Mounting. This part number supersedes to 99610113781 Genuine Porsche part 99310113701

Solves the problems of loose head studs, The exhaust leak you hear in the 911 may actually be the cylinder head leaking where the studs have pulled loose. As Porsche increased displacement of the 911 engine, the different rates of thermal expansion have caused head studs to break or pull out from the engine case.

Superior Tested/Proven strength. (compared to Dilavar & Raceware)

Fits:
Porsche 911 1965-89
Porsche 964 1989-94
Porsche 993 1994-98

This product supersedes Porsche's old part numbers:
- 993 101 170 51

Click picture for large parts diagram.
Diagram Ref No 2.

Retaining Bar for Crankcase 

Restore your Porsche 993 turbo engine with this OE Match Crankcase Retaining Bar.
Designed for use within the crankcase assembly, this component helps maintain the correct positioning and retention of associated engine components. Accurate fitment is particularly important on a high-performance air-cooled engine such as the Porsche 993 Turbo, making a correctly manufactured replacement an essential consideration during an engine rebuild or crankcase overhaul.

Fits:

• Porsche 993 (911) TURBO 1994-96
• Porsche 993 (911) TURBO S 1994-97

Diagram Ref No 38

This OE Match component provides a practical replacement where the original retaining bar has become damaged, worn or unsuitable for reuse.

What Does a Crankcase Retaining Bar Do?

The retaining bar forms part of the crankcase assembly and is designed to secure and correctly locate the components it supports within the engine.

Its functions include:

• Providing secure retention within the crankcase assembly
• Maintaining correct component positioning
• Supporting reliable engine assembly
• Helping restore the crankcase to the correct configuration during rebuilding

Although relatively simple in appearance, retaining components are important to the correct assembly and long-term reliability of the engine.

Why Do Crankcase Retaining Bars Fail?

Unlike routine service components, a crankcase retaining bar does not normally have a fixed replacement interval. Replacement is generally required because of age, damage or issues discovered during engine disassembly.

Common reasons for replacement can include:

• Physical damage during previous engine work
• Corrosion or deterioration
• Distortion
• Damaged mounting or contact areas
• Previous incorrect installation
• Unsuitability for reuse during a comprehensive engine rebuild

When Should It Be Replaced?

The retaining bar should be inspected whenever the relevant crankcase components are dismantled.

Replacement is recommended when:

• The original component is damaged or distorted
• Corrosion or deterioration is present
• Correct fitment can no longer be guaranteed
• Carrying out a major Porsche 993 Turbo engine rebuild
• Restoring an engine where previous repair quality is unknown
• The original retaining component is missing

Replacing questionable retaining hardware during an engine rebuild can help ensure the assembly is returned to the correct specification.

Porsche 993 Turbo Crankcase and Engine Rebuild Parts

Rebuilding a Porsche 993 Turbo engine requires careful attention to both major internal components and the smaller retaining hardware used throughout the crankcase assembly.

Components such as the crankcase retaining bar should be carefully inspected during disassembly. Reusing damaged, distorted or heavily deteriorated parts can compromise the quality of an otherwise comprehensive engine rebuild.

For customers searching for Porsche 993 Turbo crankcase parts, Porsche 993 engine rebuild components or replacement part number 99310115150, this OE Match retaining bar provides a suitable solution for maintenance, restoration and complete engine overhaul projects.

Benefits of OE Match Porsche 993 Turbo Engine Parts

• Suitable for specialist Porsche engine rebuilds
• Replacement for ageing or damaged original components
• Helps restore correct engine assembly
• Ideal for Porsche 993 Turbo restoration projects
• Useful during crankcase inspection and overhaul
• Cost-effective alternative when replacing worn components