do not press the back button…
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Con Rod Nut
Sold each - 12 required per car
The OE Match Con Rod Nut is a critical internal
engine fastener used to secure the connecting rod cap to the connecting rod
assembly. Suitable for various Porsche 911, 964, 993, 996 Turbo and 997 Turbo
engines, this precision-engineered component plays a vital role in maintaining
the structural integrity of the engine's rotating assembly.
Fits:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Diagram Ref No 11
The connecting rod assembly is subjected to enormous forces during engine operation, particularly at high RPM. The con rod nuts must maintain precise clamping force to ensure the connecting rod cap remains securely attached under extreme combustion and inertial loads. Even the slightest loss of clamping force can result in catastrophic engine failure.
For this reason, con rod nuts are considered a critical engine rebuild component and should always be replaced during engine overhauls, connecting rod servicing or performance engine builds.
What Does a Con Rod Nut Do?
The con rod nut secures the connecting rod cap to the connecting rod body, clamping around the crankshaft journal bearing.
Its functions include:
- Maintaining connecting rod cap security
- Preserving bearing crush and alignment
- Supporting crankshaft rotation
- Withstanding high engine loads
- Maintaining precise clamping force
- Supporting engine reliability
- Protecting internal engine components
The connecting rod assembly relies entirely on the integrity of its fastening hardware to survive the extreme loads generated during operation.
Why Do Con Rod Nuts Fail?
Con rod nuts are subjected to repeated tensile loads, heat cycles and vibration throughout their service life.
Common causes of failure include:
- Metal fatigue
- Repeated engine stress cycles
- Overstretching during previous installation
- Improper torque procedures
- High mileage wear
- Performance engine operation
- Corrosion during storage
- Reuse during multiple rebuilds
Many con rod nuts are designed as single-use fasteners and can lose their ability to maintain proper clamping force if reused.
When Should Con Rod Nuts Be Replaced?
Replacement is strongly recommended whenever the connecting rods are disassembled.
Typical situations include:
- Engine rebuilds
- Crankshaft replacement
- Connecting rod servicing
- Bearing replacement
- Performance engine upgrades
- Motorsport engine preparation
- Full engine restoration projects
- Preventative rebuild maintenance
As con rod nuts are relatively inexpensive compared to the cost of engine repairs, replacing them during rebuild work is considered essential best practice.
Why Replacement Matters
The con rod nut is one of the most critical fasteners within the entire engine.
Benefits of replacement include:
- Maintains correct clamping force
- Supports bearing integrity
- Reduces risk of engine failure
- Improves engine reliability
- Protects expensive internal components
- Essential for professional engine builds
- Supports high-performance applications
- Provides peace of mind during rebuilds
For air-cooled and turbocharged Porsche engines, correct connecting rod hardware is fundamental to long-term durability and performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310317403
The product you are viewing cross references to these numbers
100 Plasigauge strips per box
PLASTIGAUGE PL-A is widely used in the measurement of clearance in plain automotive bearings. Measurement of clearance in big-end bearings can be achieved without dismantling the crankshaft.
For measurements of: 0.001″ to 0.007″ (0.025mm – 0.175mm)
Suitable for use at temperatures between 0°C and 35°C
Contents:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PLA007
The product you are viewing cross references to these numbers
