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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.
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The oil sump return seal is a small but critical component within the engine lubrication system, designed to provide a secure seal at the oil return connection between engine components and the sump (oil pan). This seal ensures that engine oil returning to the sump remains contained within the system, preventing leaks and maintaining proper oil circulation.
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Diagram Ref No 6
What This Product Does:
- Seals oil return passages leading back to the sump
- Prevents engine oil leaks at connection points
- Maintains proper oil pressure and circulation
- Ensures efficient return flow of oil within the engine
Symptoms Of Wear Or Failure:
- Oil leaks from the lower engine or sump area
- Oil residue around return pipe or connection points
- Gradual drop in engine oil level
- Burning oil smell from oil contacting hot components
- Visible cracking or hardening of the seal material
Why Replacement Matters:
- Prevents oil leaks and engine contamination
- Maintains correct oil pressure and circulation
- Protects engine components from inadequate lubrication
- Reduces risk of oil-related engine damage
- Ensures a clean and efficient engine bay
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The oil sump seal ring is a critical sealing component within the engine lubrication system, designed to provide a tight, leak-proof seal between the oil sump (oil pan) and adjoining engine components or fittings. This seal ring helps maintain the integrity of the oil system by preventing oil from escaping at key connection points.
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Diagram Ref No 7
What This Product Does:
- Creates a secure seal at sump connection points
- Prevents engine oil leaks from the sump area
- Maintains proper oil pressure within the system
- Ensures efficient oil circulation and system integrity
Symptoms Of Wear Or Failure:
- Oil leaks from the sump or lower engine area
- Oil residue or wetness around sump connections
- Gradual drop in engine oil level
- Burning oil smell from leaks contacting hot components
- Hardened, cracked, or flattened seal ring upon inspection
Why Replacement Matters:
- Prevents oil leaks and loss of engine oil
- Maintains correct oil pressure and circulation
- Protects engine components from insufficient lubrication
- Ensures a clean and efficient engine bay
- Helps avoid costly repairs caused by oil loss or contamination
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