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 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Upgrade or restore critical engine hardware on your Porsche 911 (997-series) with this genuine OEM bolt with washer. Designed for the crankshaft assembly on M97.01 engines, this fastener ensures correct clamping, correct load distribution and secure attachment.
Fits:
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Diagram Ref No 31
What This Product Does:
- This bolt with integrated washer (combination screw) clamps the crankshaft/flywheel assembly to the engine block or connection plate, allowing torque transmission from the engine.
- Because it's in a high-load, rotating, high-temperature environment, the bolt must maintain specification: correct size, correct material strength, proper washer preload, and correct torque/installation.
- The washer portion helps distribute clamping load and prevent loosening under vibration and rotational forces.
- If this bolt fails, loosens or is incorrect, it could lead to flywheel/shaft movement, mis-alignment, major engine damage or catastrophic failure.
When You Might Need Replacement:
- You are removing the crankshaft, flywheel, or performing engine teardown/major service.
- The bolt appears corroded, damaged, stretched, or shows evidence of prior over-torque or reuse beyond specification.
- The washer portion is deformed, missing, or not the correct factory spec.
- You’re assembling a high-performance or rebuilt engine and want to ensure all critical bolts meet original Porsche specification rather than reuse old hardware.
Why Replacement Matters:
- Engine safety & reliability: Securing the crankshaft/flywheel area is essential for the engine’s mechanical health. A compromised bolt here can lead to misalignment, vibration, failure of bearings, or worse.
- Maintaining OEM integrity: Using the correct Porsche part (99710220200) ensures correct dimensions, material, washer design, and correct preload/torque spec.
- Avoiding long-term risk: Because this bolt operates in a high-stress rotating environment, replacing it when doing major work means you don’t risk future failure or damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710220200
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
