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Crankcase Parts

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DISPLAYING 1 to 16 (of 24 products)
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35660310100/1KIT1
Product Information
Product Information
Conversion kit 6v dynamo to 12v alternator


Fits:
Porsche 356A - 1955 to 1959
Porsche 356B T5 - 1959 to 1962


12v Alternator Conversion Kit for all three piece engines on 356A  and 356B T5 
Perfect for 12v power upgrades without the concourse look

Kit includes:
High output 12v 55 amp alternator
Early Adaptor plate (Only required for early style oil filler)
Fan Housing Backing Plate
Alternator Stand, Alternator Strap
Pulley Hub
Gaskets & Hardware



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Related, superseded, cross reference or alternative numbers for comparison.

35660310100
61660310201

The product you are viewing cross references to these numbers
35660310601/1KIT1
Product Information
Product Information
Conversion kit 6v dynamo to 12v alternator. 


Fits:
Porsche 356B T6 - 1962 to 1963
Porsche 356C - 1963 to 1965
Porsche 912 - 1965 to 1969

12v Alternator Conversion Kit for all three piece engines on 356B T6 , 356C and 912
Perfect for 12v power upgrades without the concourse look

Kit includes:
High output 12v 55 amp alternator
Fan Housing Backing Plate
Alternator Stand
Alternator Strap
Pulley Hub
Gaskets & Hardware

35660310100/1KIT
Product Information
Product Information
Conversion kit 6v dynamo to 12v alternator. 


Fits:
Porsche 356A - 1955 to 1959
Porsche 356B T5 - 1959 to 1962


12v Alternator Conversion Kit for all three piece engines on 356A  and 356B T5 
Perfect for 12v power upgrades without the concourse look

Kit includes:
High output 12v 100 amp alternator
Early Adaptor plate (Only required for early style oil filler)
Fan Housing Backing Plate
Alternator Stand, Alternator Strap
Pulley Hub
Gaskets & Hardware



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Related, superseded, cross reference or alternative numbers for comparison.

35660310100
61660310201

The product you are viewing cross references to these numbers
35660310601/1KIT
Product Information
Product Information
Conversion kit 6v dynamo to 12v alternator. 


Fits:
Porsche 356B T6 - 1962 to 1963
Porsche 356C - 1963 to 1965
Porsche 912 - 1965 to 1969

12v Alternator Conversion Kit for all three piece engines on 356B T6 , 356C and 912
Perfect for 12v power upgrades without the concourse look

Kit includes:
High output 12v 100 amp alternator
Fan Housing Backing Plate
Alternator Stand
Alternator Strap
Pulley Hub
Gaskets & Hardware

61608134/1
Product Information
Product Information
Blanking cover plate mechanical fuel pump. 

Fits:
Porsche 356A - 1955 to 1959
Porsche 356B - 1959 to 1963
Porsche 356C - 1963 to 1965


Fuel Pump Cover Plate to be used when converting the mechanical fuel pump to an electric fuel pump.
Produced from high quality cast alloy to match the engine case.



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61608134
61608134

The product you are viewing cross references to these numbers
54701135/1
Product Information
Product Information
Bleeder pipe for Carrera engine 547 and 692/0.

klassiek


Fits:
Porsche 356 with Carrera engine 547 and 692/0

Click 'Zoom in' for large parts diagram.
Diagram ref no 47

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

54701135
547 01 135
54701135

The product you are viewing cross references to these numbers
Special Order item
99907000403
Product Information
Product Information
Cap nut for crankcase.

porsche

Fits:
Porsche 914/6 (1970 - 1972)
Porsche 356 Pre A (1948 - 1955)
Porsche 356 A (1955 - 1959)
Porsche 356 B (1959 - 1963)
Porsche 356 C (1963 - 1965)
Porsche 911 (1965 - 1977)
Porsche 911 Turbo (1975 - 1977)

Click 'Zoom in' for large parts diagram.
Diagram ref no 28

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

99907000403
99907000403
99907000402

The product you are viewing cross references to these numbers
35660310100/1
Product Information
Product Information
Conversion kit 6v dynamo to 12v alternator. 


Fits:
Porsche 356A - 1955 to 1959
Porsche 356B T5 - 1959 to 1962


12v Alternator Conversion Kit for all three piece engines on 356A  and 356B T5 
Perfect for 12v power upgrades without the concourse look

Kit includes:
Early Adaptor plate (Only required for early style oil filler)
Fan Housing Backing Plate
Alternator Stand, Alternator Strap
Pulley Hub
Gaskets & Hardware

Please Note
Alternator NOT included

35660310601/1
Product Information
Product Information
Conversion kit 6v dynamo to 12v alternator. 


Fits:
Porsche 356B T6 - 1962 to 1963
Porsche 356C - 1963 to 1965
Porsche 912 - 1965 to 1969

12v Alternator Conversion Kit for all three piece engines on 356B T6 , 356C and 912
Perfect for 12v power upgrades without the concourse look

Kit includes:
Fan Housing Backing Plate
Alternator Stand
Alternator Strap
Pulley Hub
Gaskets & Hardware

Please Note
Alternator NOT included



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

35660310601
35660310601

The product you are viewing cross references to these numbers
Special Order item
50004103
Product Information
Product Information
Crankcase Cylinder (80mm) Gasket.
porsche

Fits:
Porsche 356 1300 / 1500 /S 1950-59

Click 'Zoom in' for large parts diagram.
Diagram ref no 9

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50004103
50004103

The product you are viewing cross references to these numbers
Special Order item
99911302951
Product Information
Product Information
Crankshaft seal rear. DG 60 X 80 X 10/1.

Fits:
Porsche 356 / 356A 1950-59
Porsche 356 B/ 356 C 1600-SC 1965-65
Porsche 912 1965-69

Click 'Zoom in' for large parts diagram.
Diagram ref no 48

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99911302951
99911302950
81-17085-00
811708500

The product you are viewing cross references to these numbers
99911302951/1
Product Information
Product Information
Crankshaft seal rear. DG 60 X 80 X 10/1.

Fits:
Porsche 356 / 356A 1950-59
Porsche 356 B/ 356 C 1600-SC 1965-65
Porsche 912 1965-69

Click 'Zoom in' for large parts diagram.
Diagram ref no 48

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

99911302951
99911302950
99911302951

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Special Order item
PCG00113300
Product Information
Product Information
Engine oil drain plug.

porsche

Fits:
Porsche 912 1965-69
Porsche 356 1950-59 1300 / 1500 / 1600 (not GS or GT)
Porsche 356 1960-65 1600 SC

Click 'Zoom in' for large parts diagram.
Diagram ref no 27

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

PCG00113300
53901133

The product you are viewing cross references to these numbers
PCG00113300/1
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Product Information
Engine oil drain plug.

Fits:
Porsche 912 1965-69
Porsche 356 1950-59 1300 / 1500 / 1600 (not GS or GT)
Porsche 356 1960-65 1600 SC

Diagram ref no 27

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

PCG00113300
53901133
1613800200

The product you are viewing cross references to these numbers
53901150/1
Product Information
Product Information

Billet Aluminium Oil Drain / Strainer Cover

Upgrade one of the most commonly disturbed sealing surfaces on your classic Porsche engine with this OE Match Billet Aluminium Oil Drain and Strainer Cover. Designed for all Porsche 356 and 912 engines using the 3-piece engine case, this upgraded cover is CNC machined from aluminium to provide a precise, perfectly flat contact surface.

Fits:

  • Porsche 912 SWB 1965-1968 (F)
  • Porsche 356 1950-55
  • Porsche 356A 1955-59
  • Porsche 356B 1959-63
  • Porsche 356C 1963-65

Diagram ref no 31

The improved rigidity of the billet aluminium construction helps maintain an even sealing surface when installed, making it a worthwhile upgrade over an old, distorted or damaged original cover.

Magnet Installation

Please note that a magnet is not included with this cover.

The magnet from the existing oil strainer cover must be transferred to the new billet aluminium cover and secured using the supplied rivet.

This allows the original magnetic function to be retained while benefiting from the upgraded CNC-machined cover.

Finished in black for a discreet appearance, the cover can be installed using the original engine studs, with no longer replacement studs required.

What Does the Oil Strainer Cover Do?

The oil strainer cover is fitted to the underside of the engine and closes the opening for the engine oil strainer.

The strainer itself helps prevent larger particles and contaminants from circulating through the engine lubrication system, while the cover provides the sealing surface required to contain the engine oil.

Because the cover is removed during servicing and oil strainer maintenance, maintaining a flat and correctly sealed surface is particularly important.

A correctly fitted oil strainer cover helps:

  • Seal the engine oil strainer opening
  • Prevent engine oil leaks
  • Secure the oil strainer assembly
  • Provide access during oil system servicing
  • Maintain the integrity of the engine lubrication system

Why Do Original Oil Strainer Covers Fail?

Original-style covers can become distorted after years of use and repeated removal and installation.

One of the most common problems is deformation around the mounting holes caused by repeated tightening of the retaining nuts. Once the plate is no longer completely flat, the gasket may struggle to seal evenly against the engine case.

Other causes of deterioration can include:

  • Repeated tightening and removal
  • Over-tightening of mounting hardware
  • Distortion around the stud holes
  • Damage to the sealing surface
  • Corrosion and general age
  • Scratches or previous incorrect installation

A distorted cover can contribute to the familiar oil seepage sometimes found around the bottom of older Porsche 356 and 912 engines.

Why Upgrade to Billet Aluminium?

The main advantage of this upgraded cover is its CNC-machined billet aluminium construction.

Rather than relying on a thinner plate that can become distorted over time, the billet design provides a rigid and accurately machined sealing surface.

Benefits include:

  • CNC machined from aluminium
  • Perfectly flat contact surface
  • Increased rigidity
  • Reduced tendency to distort
  • Improved support for the sealing gasket
  • Durable replacement for an ageing original cover
  • Black finish for a discreet appearance
  • Reuses the original mounting studs

For engines that are regularly serviced or have experienced persistent seepage around the strainer cover, upgrading to a rigid billet version can provide a more dependable foundation for achieving a good seal.

Installation

The 53901150 cover has been designed to fit using the original engine case studs.

There is no requirement to replace the standard studs with longer versions, simplifying installation and maintaining the original mounting arrangement.

Oil Strainer Covers, Drain Plates & Engine Lubrication Parts

Oil leaks around the lower engine area are a common concern when maintaining older Porsche 356 and 912 engines. While replacing gaskets is often the first step, a gasket cannot always compensate for a cover that has become warped or distorted.

A CNC-machined billet aluminium oil strainer cover provides a rigid, accurately machined sealing surface and is therefore a useful upgrade during an engine rebuild, restoration or routine oil system refurbishment.

When replacing the oil strainer cover, it is also worthwhile inspecting the strainer, gaskets, mounting hardware and surrounding sealing surfaces. Correct installation and tightening are important to avoid damaging components and to achieve an effective seal.




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

53901150
53901150

The product you are viewing cross references to these numbers
53901150/2
Product Information
Product Information

Billet Aluminium Oil Drain / Strainer Cover with Cooling Fins

Upgrade the engine lubrication system on your classic Porsche with this OE Match Billet Aluminium Oil Drain and Strainer Cover with 21 Cooling Fins.  Designed for all Porsche 356 and 912 engines using the 3-piece engine case, this upgraded cover is CNC machined from aluminium to provide a precise, perfectly flat contact surface.

Fits:

  • Porsche 912 SWB 1965-1968 (F)
  • Porsche 356 1950-55
  • Porsche 356A 1955-59
  • Porsche 356B 1959-63
  • Porsche 356C 1963-65

Diagram ref no 31

The improved rigidity of the billet aluminium construction helps maintain an even sealing surface when installed, making it a worthwhile upgrade over an old, distorted or damaged original cover. In addition, 21 integral cooling fins increase the cover's external surface area, helping transfer heat from the engine oil to the surrounding airflow. This provides a useful additional oil-cooling effect while retaining a straightforward bolt-on installation.

Magnet Installation

Please note that a magnet is not included with this cover.

The magnet from the existing oil strainer cover must be transferred to the new billet aluminium cover and secured using the supplied rivet.

This allows the original magnetic function to be retained while benefiting from the upgraded CNC-machined cover.

Finished in black for a discreet appearance, the cover can be installed using the original engine studs, with no longer replacement studs required.

What Does the Oil Strainer Cover Do?

The oil strainer cover is located on the underside of the engine and closes the opening containing the engine oil strainer.

The strainer helps prevent larger particles and contaminants from circulating through the engine lubrication system, while the cover seals the assembly and keeps the engine oil contained.

Because this area is accessed during oil and strainer servicing, the condition and flatness of the cover are particularly important for achieving a reliable seal.

A correctly fitted oil strainer cover helps:

Seal the engine oil strainer opening Prevent oil leakage Secure the oil strainer assembly Provide access during oil system servicing Maintain the integrity of the lubrication system

What Do the 21 Cooling Fins Do?

This upgraded version incorporates 21 cooling fins directly into the aluminium cover.

The fins increase the surface area exposed to airflow underneath the vehicle. As heat passes from the engine oil into the aluminium cover, the increased surface area helps dissipate some of this heat into the surrounding air.

The fins therefore provide supplementary oil cooling without requiring an additional external oil cooler or major modifications to the engine.

This can be particularly useful on engines exposed to sustained higher temperatures during enthusiastic road driving or other demanding operating conditions.

Why Do Original Oil Strainer Covers Fail?

Original-style covers can deteriorate or become distorted after decades of use and repeated servicing.

One of the most common problems is deformation around the mounting holes caused by repeated tightening or previous over-tightening. Once the cover is no longer completely flat, the gasket may not be compressed evenly against the engine case.

Common problems include:

  • Warping or distortion
  • Deformation around mounting holes
  • Over-tightened mounting hardware
  • Damaged sealing surfaces
  • Scratches and corrosion
  • Repeated removal and installation
  • General age-related deterioration

A distorted cover can contribute to oil seepage even when new gaskets are fitted.

Why Upgrade to a Billet Aluminium Version?

The major advantage of this upgraded cover is its rigid CNC-machined aluminium construction.

Machining the component provides a precise, flat sealing surface, helping the gasket sit evenly between the cover and engine case. The increased rigidity also makes the cover less prone to the distortion commonly found on older conventional drain plates.

Benefits include:

  • CNC-machined aluminium construction
  • Perfectly flat contact surface Increased rigidity
  • Reduced tendency to distort
  • Improved support for the sealing gasket 21 integrated cooling fins
  • Additional oil heat dissipation
  • Durable replacement for an ageing original cover
  • Black finish
  • Straightforward installation using original studs

For Porsche 356 and 912 engines suffering from a distorted original cover, or where improved oil cooling is desirable, the billet finned version combines improved sealing characteristics with an additional cooling function.

Easy Installation

The cover has been designed to fit using the original engine case studs.

No longer studs are required, helping maintain the original mounting arrangement and making this a straightforward upgrade during routine oil system servicing or an engine rebuild.

Finned Oil Strainer Covers & Engine Oil Cooling Upgrades

Maintaining effective lubrication and controlling engine oil temperature are important considerations for classic Porsche 356 and 912 engines.

Original oil strainer covers can become distorted after years of servicing, potentially making it difficult for the gasket to seal correctly. Replacing a warped cover with a CNC-machined billet aluminium version provides a flatter and more rigid sealing surface while retaining straightforward access to the oil strainer.

The addition of 21 cooling fins provides another useful advantage. By increasing the surface area of the aluminium cover exposed to airflow beneath the vehicle, additional heat can be dissipated from the oil system.

This makes the finned billet cover a practical upgrade for owners looking to combine improved sealing, increased component rigidity and supplementary oil cooling in a single direct-fit component.

When replacing the oil strainer cover, it is also worthwhile inspecting the oil strainer, gaskets, magnet, mounting hardware and engine case sealing surface before reassembly.



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

53901150
53901150

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 24 products)
1 2
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About Crankcase Parts

Precision Crankcase Parts – Strength, Balance, and Reliability for Porsche Engines

The crankcase forms the core of every Porsche engine, housing key rotating components such as the crankshaft, bearings, and connecting rods. It provides structural rigidity, oil containment, and precise alignment for the engine’s moving parts — making it critical to both performance and longevity.

At Design911, we offer a wide range of precision-engineered crankcase components, including bearing shells, seals, breather valves, dowels, plugs, and fasteners, all manufactured to exacting tolerances. Each part is crafted from high-strength, heat-resistant materials to ensure lasting durability and performance under the most demanding driving conditions.

Whether you’re restoring an air-cooled 911 or maintaining a modern 992, our manufacturer-quality crankcase parts ensure perfect fitment, oil-tight sealing, and reliable performance for years to come.

What Do Crankcase Parts Do?

Crankcase components perform vital structural and lubrication roles within the engine, protecting internal parts and maintaining pressure balance.

Core Functions:

  • House and support the crankshaft, connecting rods, and bearings.
  • Contain and distribute oil to lubricate moving components.
  • Maintain structural rigidity to prevent vibration and misalignment.
  • Control crankcase ventilation to reduce oil contamination and pressure build-up.

In performance and classic Porsche engines alike, the crankcase ensures stability, smooth rotation, and reliable oil management — key to consistent power and reduced wear.

Why Do Crankcase Parts Fail?

Over time, crankcase components can degrade due to heat cycles, vibration, oil contamination, and mechanical fatigue. When neglected, these failures can lead to oil leaks, pressure imbalance, and even catastrophic engine damage.

Common Causes of Failure Include:

  • Oil seal wear causing leaks and pressure loss.
  • Bearing fatigue from prolonged high load or low oil pressure.
  • Warped surfaces due to overheating or corrosion.
  • Clogged breather valves causing pressure build-up and oil blow-by.
  • Fastener fatigue leading to structural loosening or vibration.

Replacing worn crankcase parts during an engine rebuild or maintenance interval is essential to preserve oil control, alignment, and crankshaft integrity.

Why Replace with Precision-Engineered Crankcase Parts?

High-quality crankcase components ensure your Porsche engine retains its strength, sealing capability, and precise alignment — essential for performance, reliability, and longevity.

Key Benefits:

  • Restores internal alignment for smooth crankshaft rotation.
  • Prevents oil leaks and pressure loss, maintaining engine performance.
  • Improves lubrication control and bearing life.
  • Reduces vibration and noise caused by worn or loose components.
  • Crafted from corrosion- and heat-resistant materials for lasting strength.
  • Perfect fitment and tolerance for air-cooled and water-cooled Porsche engines.

Engineers and restorers trust precision crankcase parts to maintain Porsche’s legendary reliability and mechanical balance — whether on the road or the track.

Highlights:

  • Comprehensive range of crankcase seals, bearings, bolts, and breather components.
  • Precision-machined parts designed for high-load, high-temperature performance.
  • Manufacturer-quality materials and tolerances.
  • Perfect for classic engine restorations and high-performance rebuilds.
  • Improves oil management, structural rigidity, and reliability.
  • Compatible with air-cooled and modern Porsche engine architectures.

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