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- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
The standard size (STD) engine crankshaft is a critical rotating component for Porsche 996 Carrera and 997.1 Carrera / Carrera S models equipped with the M96/M97 engines
Fits:
- Porsche 996 C2 3.6L 09/01-2005 (engine code M9603)
- Porsche 996 C4 3.6L 09/01-2005 (engine code M9603)
- Porsche 996 C4S 3.6L 09/01-2005 (engine code M9603)
- Porsche 997 MK1 Carrera 2 3.6L 2005-08 (engine code M9605)
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08 (engine code M9701)
- Porsche 997 MK1 Carrera 4 3.6L 2005-08 (engine code M9605)
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08 (engine code M9701)
Designed to maintain original journal dimensions and deliver balanced, dependable rotation, this crankshaft ensures proper bearing clearances, stable lubrication and smooth power delivery—essential for both everyday driving and spirited performance use.
Whether restoring a high-mileage engine, repairing bottom-end damage or conducting a complete power unit rebuild, this precision crankshaft is fundamental to achieving long-term reliability and authentic Porsche performance.
What the Crankshaft Does
This crankshaft performs multiple key functions at the heart
of the Porsche flat-six engine:
- Transforms piston motion into smooth, controlled rotational torque
- Maintains
exact journal sizing for correct oil clearance and bearing support
- Provides
balanced rotation across the engine’s full RPM range
- Supports
consistent lubrication through precision oil galleries
- Ensures
durable, stable bottom-end operation under high loads
- Forms the structural core of the M96/M97 rotating assembly
A correctly sized, properly balanced crankshaft is essential for engine health, power consistency and long-term performance.
Why Porsche Crankshafts Can Fail
While Porsche’s M96/M97 engines are known for performance,
certain conditions can cause premature crankshaft wear or failure. Common
causes include:
- Oil
starvation leading to bearing knock and journal scoring
- High
mileage fatigue causing cracks or out-of-round journals
- Worn
or failed bearings damaging crankshaft surfaces
- Contaminated
lubrication accelerating wear on critical journals
- Overheating
compromising crankshaft strength
- Imbalance
due to previous machining or improper rebuild work
- Harmonic vibration intensified by worn flywheel or pulley components
Symptoms often include low oil pressure, knocking noises, metal debris in oil filters, engine vibration or difficulty maintaining consistent RPM.
Why You Should Replace a Worn Crankshaft
Replacing a damaged crankshaft with a precision-built, standard size replacement designed to match Porsche performance characteristics restores the reliability and durability required from the M96/M97 engine.
Key benefits include:
- Restored journal accuracy and correct bearing clearance
- Improved lubrication and oil pressure stability
- Smooth, balanced rotation across all RPM ranges
- Prevention of major bottom-end failures
- Enhanced reliability for road and performance driving
- Extended lifespan of rods, pistons, bearings and related components
For 996 and 997.1 owners, a correct standard-size crankshaft is vital to a successful and lasting engine rebuild.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610201204
The product you are viewing cross references to these numbers
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Fits:
Porsche 911 Carrera 3.2L 1984-89
Porsche 924S 1986-88
Porsche 944 1982-91
Porsche 968 1992-95
Porsche 964 1989-94
Porsche 993 1994-98
Porsche 996 Turbo / GT2 / GT3 1999-05
Porsche 997 Carrera 2009-12
Porsche 997 Turbo / GT2 2007-09
Porsche 997 Turbo / GT2 RS 2009-14
Porsche 997 GT3 2007-13
Porsche 981 Boxster 2013>>
Porsche 987 Boxster 2009-12
Porsche 981C Cayman 2014>>
Porsche 987C Cayman 2009-13
Porsche 991 Carrera / 991 Turbo / 991 GT3
Click 'Zoom in' for large parts diagram.
Diagram ref no 1A
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90009503100
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
3G Mineral Grease: To coat journal prior to use of Plastigauge
3G Silicone Grease: To apply to surface of shell
Lubricants to assist with the measurement of clearance in automotive bearings.
Plastigauge Precision Clearance Gauges