Connection rod bolt. Porsche 911 1965-69 / 914  ❭  90110317200

Connecting Rod Bolt
Sold each - 12 required per engine

Maintain engine reliability during rebuild work with this OE Connecting Rod Bolt. The connecting rod bolt is a critical internal engine fastener used to secure the connecting rod cap to the connecting rod body around the crankshaft journal.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 914 (1970-1976)

Diagram Ref No 20

Although small, this component is subjected to extreme loads every time the engine runs. It must maintain precise clamping force under high RPM, combustion pressure, heat and vibration. For this reason, connecting rod bolts should be treated as essential engine rebuild hardware and replaced whenever the connecting rods are removed or serviced.

What Does a Connecting Rod Bolt Do?

The connecting rod bolt clamps the rod cap securely to the connecting rod.

Its main functions include:

• Securing the connecting rod cap
• Maintaining bearing alignment
• Supporting correct crankshaft rotation
• Preserving bearing crush
• Withstanding high engine loads
• Helping prevent internal engine failure

Correct clamping force is vital for engine durability and safe operation.

Why Do Connecting Rod Bolts Fail?

Connecting rod bolts operate under severe stress and can weaken over time.

Common causes of failure include:

• Metal fatigue
• Overstretching during previous installation
• Incorrect torque procedures
• High RPM engine use
• Heat cycling
• Thread damage
• Reuse during engine rebuilds
• General age and wear

Many connecting rod bolts are considered single-use components and should not be reused once removed.

When Should They Be Replaced?

Replacement is strongly recommended when:

• Rebuilding the engine
• Removing connecting rods
• Replacing big end bearings
• Servicing the crankshaft
• Building a performance engine
• Inspecting high-mileage engines
• Previous torque history is unknown

Replacing rod bolts during rebuild work is inexpensive protection against serious engine damage.

Why Replacement Matters

A failed connecting rod bolt can cause catastrophic engine failure.

Benefits of replacement include:

• Correct clamping force
• Improved engine reliability
• Protection of crankshaft and bearings
• Reduced risk of rod cap movement
• Professional rebuild standards
• Long-term engine durability
• Greater peace of mind