Crankshaft & Parts

Crankshaft / V-Belt Pulley Hex Head Bolt. M12 x 1.5 x 22.



Fits:
Porsche 911 1965-89
Porsche 914 1970-76
Porsche 964 Turbo 3.3L 1991-92

Click 'Zoom in' for large parts diagram
Diagram ref no 15

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99909300502

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Crankshaft drive gear.



Fits:
Porsche 911 / 912 / 930 1965-77
Porsche 914 / 914-6 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 13

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90110211501

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Crankshaft holder for Porsche 911



At last an elegant way to hold the 911 crankshaft for inspection, cleaning, disassembly, and rod bolt stretching. The crank rotates smoothly between centres to allow for complete access to all journals. Mounts vertically or horizontally in you bench mounted vice for optimal versatility.

Made from stainless steel and anodized aluminium.

Crankshaft radial sealing ring, undersize.
64.5 x 85 x 10



Fits:
Porsche 911 F 1965-73
Porsche 911 G 1974-77
Porsche 914/6 1970-72

Click 'Zoom in' for large parts diagram.
Diagram ref no 17

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90110291100

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Standard Size Crankshaft (STD)
The standard size (STD) engine crankshaft is an essential rotating component for the early air-cooled Porsche models.

Fits:

• Porsche 911 1972-1973 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1975-1977 3.0L Turbo (930)  

Designed to maintain original journal dimensions and deliver long-lasting structural integrity, this crankshaft provides the precision, balance and strength demanded by classic flat-six engines.

Whether performing a true-to-original restoration or a full bottom-end rebuild, this crankshaft ensures proper bearing clearances, smooth rotation and the reliability required to support both naturally aspirated and early turbocharged Porsche engines.

What the Crankshaft Does

This crankshaft plays a central role in engine operation by:

• Transforming piston movement into rotational torque to drive the transmission
  
• Maintaining exact journal sizing for correct oil film and bearing support
  
• Ensuring balanced rotation across the entire RPM range
  
• Supporting reliable lubrication through precision oil galleries
  
• Handling high load and thermal stress typical of air-cooled performance engines
  
• Providing dependable bottom-end stability for both normally aspirated and turbocharged setups

Without a properly sized and balanced crankshaft, the engine cannot run smoothly or reliably.

Why Crankshafts Can Fail

Although Porsche’s air-cooled crankshafts are renowned for durability, age, performance use and lubrication issues can lead to failure. Common causes include:

• Oil starvation causing bearing damage and journal scoring
  
• Contamination in the oil system leading to abrasive wear
  
• High-mileage fatigue resulting in stress cracks or journal out-of-round conditions
  
• Overheating reducing metallurgical strength
  
• Incorrect machining or imbalance from past rebuilds
  
• Detonation or pre-ignition placing excessive load on journals
  
• Corrosion from long storage or moisture intrusion

Symptoms can include low oil pressure, vibration, bearing noise, metal debris in the oil, or excessive crankshaft end-float.

Why You Should Replace a Worn or Damaged Crankshaft

Installing a new or precision-engineered standard size crankshaft—matched to original Porsche tolerances—provides the foundation for a reliable, long-lasting engine rebuild.

Benefits include:

• Restored bearing clearance and proper lubrication
• Smooth rotational balance and reduced engine vibration
• Improved reliability for both standard and turbocharged engines
• Protection against catastrophic bottom-end failures
• Extended lifespan for connecting rods, bearings and pistons
• Consistent performance in high-heat air-cooled environments

For valuable classics like the 1972–77 Porsche 911 and early 930 Turbo, a correct STD crankshaft is essential to preserving performance and longevity.

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91610201600

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Standard Size Crankshaft (STD)
The standard size (STD) engine crankshaft is an essential rotating component for the early air-cooled Porsche models.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 914-6 2.0L (1970-1976)

These first-generation air-cooled flat-six engines rely heavily on the strength, balance and accuracy of the crankshaft to deliver the smooth, free-revving performance that made the classic 911 legendary.

Whether performing a true-to-original restoration or a full bottom-end rebuild, this crankshaft ensures proper bearing clearances, smooth rotation and the reliability required to support both naturally aspirated and early turbocharged Porsche engines.

What the Crankshaft Does

This crankshaft plays a central role in engine operation by:

• Transforming piston movement into rotational torque to drive the transmission
  
• Maintaining exact journal sizing for correct oil film and bearing support
  
• Ensuring balanced rotation across the entire RPM range
  
• Supporting reliable lubrication through precision oil galleries
  
• Handling high load and thermal stress typical of air-cooled performance engines
  
• Providing dependable bottom-end stability for both normally aspirated and turbocharged setups

Without a properly sized and balanced crankshaft, the engine cannot run smoothly or reliably.

Why Crankshafts Can Fail

Although Porsche’s air-cooled crankshafts are renowned for durability, age, performance use and lubrication issues can lead to failure. Common causes include:

• Oil starvation causing bearing damage and journal scoring
  
• Contamination in the oil system leading to abrasive wear
  
• High-mileage fatigue resulting in stress cracks or journal out-of-round conditions
  
• Overheating reducing metallurgical strength
  
• Incorrect machining or imbalance from past rebuilds
  
• Detonation or pre-ignition placing excessive load on journals
  
• Corrosion from long storage or moisture intrusion

Symptoms can include low oil pressure, vibration, bearing noise, metal debris in the oil, or excessive crankshaft end-float.

Why You Should Replace a Worn or Damaged Crankshaft

Installing a new or precision-engineered standard size crankshaft—matched to original Porsche tolerances—provides the foundation for a reliable, long-lasting engine rebuild.

Benefits include:

• Restored bearing clearance and proper lubrication
• Smooth rotational balance and reduced engine vibration
• Improved reliability for both standard and turbocharged engines
• Protection against catastrophic bottom-end failures
• Extended lifespan for connecting rods, bearings and pistons
• Consistent performance in high-heat air-cooled environments

For early air-cooled Porsche models, the crankshaft is one of the most critical components that determines the success and durability of any engine rebuild.

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90110201101

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Crankshaft timing gear.
*** to be used for code no: 0



Fits:
Porsche 911 1965-89
Porsche 914-6 1970-76
Porsche 964 Turbo 3.3L 1991-92

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

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90110211102

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Crankshaft timing gear.
*** to be used for code no: 0



Fits:
Porsche 911 1965-89
Porsche 914-6 1970-76
Porsche 964 Turbo 3.3L 1991-92

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90110211102

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Crankshaft timing gear.
*** to be used for code no: 1



Fits:
Porsche 911 1965-89
Porsche 914-6 1970-76
Porsche 964 Turbo 3.3L 1991-92

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90110211120

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Crankshaft timing gear.
*** to be used for code no: 1

Fits:
Porsche 911 1965-89
Porsche 914-6 1970-76
Porsche 964 Turbo 3.3L 1991-92

Diagram ref no 11

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90110211120

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Crankshaft v-belt pully 116.5mm.

Fits:
Porsche 911 08/1968-75 (not Sportomatic)
Porsche 914 1970-76

Diagram ref no 15

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91110201750

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Lightened crankshaft for steel con rods. 



Fits:
Porsche 911 2.0ltr - 1965 to 1969
Porsche 911 2.2ltr - 1970 to 1971

Notes
Conforms to FIA Appendix K
Tested to 10,000 RPM

Increasing the performance of an engine via the crankshaft does not make sense at first glance, but it is worth taking a closer look. 

The mechanical efficiency of an engine, which, together with the thermodynamic efficiency and the volumetric efficiency, determines the rated output of an engine, depends fundamentally on the diameter of the crankshaft bearings and the friction in the bearings. 

Of course, the diameter cannot be easily changed, but the friction can, which in turn depends on the bending loads and the resulting vibrations of the crankshaft. This is exactly why the use of top-quality titanium connecting rods is of little use if the resulting significantly reduced rotating masses at the connecting rod foot are not also taken into account on the counterweight side of the crankshaft. 

Because only a perfectly designed crankshaft, calculated for the connecting rod weights, actually brings with it less bearing friction due to eliminated vibrations, and thus an increase in performance. Furthermore, this crankshaft is speed-resistant up to 11,000 rpm and tested in continuous operation up to 10,000 rpm. A pleasant side effect is of course a reduced load on the crankcase and less wear. 

This crankshaft is designed utilising the latest calculation methods using CAD and FE methods (finite elements), but is still FIA legal for historic motorsport and conforms to Annex K, but is only designed for operation with steel connecting rods. The focus was on the FIA ​​regulation that " in the case of a new production, the original or the newly manufactured component may be lightened, which was exactly the case with this crankshaft. 

If you want to run this crankshaft with titanium connecting rods, use crankshaft part number 91610201600/1 which is designed for the lower rotating masses of titanium connecting rods. Failure to comply with the mass balance will sooner or later lead to the crankshaft breaking at maximum speeds. 

Furthermore, this crankshaft is an authentic replacement for every standard crankshaft of the 911 from 1965 to 1971, i.e. every 2.0ltr and 2.2ltr engine. 


Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90110201101

The product you are viewing cross references to these numbers

Lightened crankshaft for titanium con rods. 

Fits:
Porsche 911 2.0ltr - 1965 to 1969
Porsche 911 2.2ltr - 1970 to 1971

Notes
Tested to 10,000 RPM

Increasing the performance of an engine via the crankshaft does not make sense at first glance, but it is worth taking a closer look. 

The mechanical efficiency of an engine, which, together with the thermodynamic efficiency and the volumetric efficiency, determines the rated output of an engine, depends fundamentally on the diameter of the crankshaft bearings and the friction in the bearings. 

Of course, the diameter cannot be easily changed, but the friction can, which in turn depends on the bending loads and the resulting vibrations of the crankshaft. This is exactly why the use of top-quality titanium connecting rods is of little use if the resulting significantly reduced rotating masses at the connecting rod foot are not also taken into account on the counterweight side of the crankshaft. 

Because only a perfectly designed crankshaft, calculated for the connecting rod weights, actually brings with it less bearing friction due to eliminated vibrations, and thus an increase in performance. Furthermore, this crankshaft is speed-resistant up to 11,000 rpm and tested in continuous operation up to 10,000 rpm. A pleasant side effect is of course a reduced load on the crankcase and less wear. 

This crankshaft is designed utilising the latest calculation methods using CAD and FE methods (finite elements) and is designed for operation with titanium connecting rods only.

If you want to run this crankshaft with steel connecting rods, use crankshaft part number 90110201100/1. Failure to comply with the mass balance will sooner or later lead to the crankshaft breaking at maximum speeds. 

Furthermore, this crankshaft is an authentic replacement for every standard crankshaft of the 911 from 1965 to 1971, i.e. every 2.0ltr and 2.2ltr engine. 

You can easily swap out any 2.0ltr or 2.2ltr 911T crankshaft that doesn't have factory counterweights for this crankshaft with counterweights.  

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91610201600

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Lock snap ring for brass gear. Number 0



Size: 2.4mm

Fits:
Porsche 356
Porsche 911
Porsche 912
Porsche 964
Porsche 993
Porsche 914
Porsche 996 Turbo / GT3
Porsche 997 Turbo / GT3

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

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