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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
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
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 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13
- 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 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 Cayman GT4 3.8L 2015-16
Fits:
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2009-12
Porsche 981 Boxster / S 2012>>
Porsche Boxster Spyder 2016>>
Porsche 981 Cayman / S 2013>>
Porsche Cayman GT4 2016>>
Porsche 991 2012>>
Porsche 991 Turbo 2014>>
Porsche 997 MKII 2010>>
Porsche 997 TURBO / S 2010-13
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A110703276
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 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII Turbo 2010-13
- 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 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 Cayman GT4 3.8L 2015-16
Fits:
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2009-12
Porsche 981 Boxster / S 2012>>
Porsche Boxster Spyder 2016>>
Porsche 981 Cayman / S 2013>>
Porsche Cayman GT4 2016>>
Porsche 991 2012>>
Porsche 991 Turbo 2014>>
Porsche 997 MKII 2010>>
Porsche 997 TURBO / S 2010-13
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
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9A110732502
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- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- 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 Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- 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 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 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 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 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- 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 Cayman GT4 3.8L 2015-16
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
This small but critical component creates a secure, leak-proof seal between the oil drain plug and the engine’s oil pan to prevent engine oil seepage. It is sized and manufactured to match the original Porsche specification for a reliable fit and sealing performance.
Sold each
Fits:
Porsche 986 Boxster
Porsche 987 Boxster
Porsche 981 Boxster
Porsche 982 (718) Boxster
Porsche 987C Cayman
Porsche 981C Cayman
Porsche 982 (718) Cayman
Porsche 996
Porsche 997
Porsche 991
Diagram ref no 24
This premium OE Match seal ring (also referred to as a crush washer or gasket) is engineered to the correct inner/outer diameters and material thickness used by Porsche on multiple model platforms.
The seal ring is ideal for use during every oil change where the drain plug has been removed and reinstalled, and whenever the original ring shows signs of compression set, distortion, corrosion, or damage. This OE Match version delivers a direct fit and consistent sealing performance comparable to the factory-specified part.
The oil drain plug seal ring sits between the oil drain plug head and the engine oil pan surface. When the drain plug is torqued to specification, the seal ring compresses slightly to form a fluid-tight barrier, preventing engine oil from escaping the sump under pressure or vibration. A proper seal helps maintain correct oil levels and prevents messy leaks on the road or in the garage.
Function: Installed each time the engine oil drain plug is removed, the seal ring is “crushed” into place during installation, creating an even seal around the drain hole. Its function is critical because even small oil leaks can lead to reduced oil levels, potential engine damage, and contamination of suspension or exhaust components. The OE Match ring reproduces the original’s sealing surface characteristics so that torque and compression behavior remain within factory-designed tolerances.
Oil drain plug seal rings are single-use sealing components that deform each time the plug is installed. Reusing an old or compressed ring can lead to oil drips or leaks, especially under heat cycling and vibration. A proper OE Match seal ring ensures a dependable oil-tight seal, helping to preserve engine lubrication integrity, avoid oil loss, and protect against environmental contamination.
When to replace:
• Every time the **oil drain plug is removed”
• If existing seal ring shows cracks, flattening, or corrosion
• When performing routine oil and filter service
• After discovering minor oil seepage at the drain plug
• During engine maintenance or oil pan removal
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90012310630
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