Original Porsche Part Genuine Porsche part 90110139100

Sump gasket
This OE match sump gasket is a direct replacement for the original Porsche sealing gasket used on the oil sump strainer plate assembly fitted to a wide range of air-cooled Porsche engines. The sump gasket seals the oil sump plate and oil strainer assembly to prevent engine oil leakage. It helps maintain proper oil containment and supports reliable lubrication system operation.
Sold each, 2 gaskets required per engine

Fits:
Porsche 911 1965 - 1989
Porsche 930 Turbo 1975 - 1989
Porsche 964 1989 - 1994
Porsche 993 1994 - 1998
Porsche 914 1970 - 1976

Diagram ref no 42.

Installed at the lower section of the engine crankcase, the gasket seals the oil sump plate and helps prevent oil leakage from the engine lubrication system. Proper sealing is critical for maintaining correct oil retention, preventing contamination, and ensuring reliable engine lubrication. The gasket is commonly replaced during oil changes, sump plate servicing, or engine rebuild work.

Function
•  Seals oil sump plate and oil strainer assembly
•  Prevents engine oil leakage
•  Maintains proper oil retention within crankcase
•  Supports reliable engine lubrication system operation
•  Resists oil exposure and engine heat

Over time, sump gaskets can harden, compress, or deteriorate due to constant exposure to engine oil and heat. A worn gasket may cause oil leaks, reduced sealing performance, and contamination around the sump area. Replacing the gasket during servicing helps maintain proper oil sealing and prevents oil loss from the lubrication system.

When to replace
•  Oil leakage around sump plate area
•  During oil strainer or sump plate servicing
•  Hardened, cracked, or compressed gasket material
•  During engine rebuild or maintenance work
•  Preventative replacement during oil service

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Related, superseded, cross reference or alternative numbers for comparison.

93010139101

The product you are viewing cross references to these numbers

Crankcase Oil Strainer 

Protect your Porsche engine with this OE Match Crankcase Oil Strainer. Manufactured to OE specifications, this precision-engineered replacement oil strainer plays a vital role in safeguarding the lubrication system by preventing large debris from entering the oil pump while ensuring unrestricted oil flow throughout the engine.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 914-6 (1970-1976)

Diagram ref no 38

Located within the engine crankcase, the oil strainer acts as the first line of defence for the lubrication system. It filters larger contaminants before the oil reaches the pump, helping to protect critical internal engine components from premature wear and damage. A clean, undamaged oil strainer is essential for maintaining consistent oil circulation and reliable engine lubrication.

Whether you're carrying out a routine oil service, rebuilding an engine or undertaking a complete restoration, replacing a worn or damaged oil strainer is a sensible preventative maintenance measure that helps preserve long-term engine reliability.

What Does the Crankcase Oil Strainer Do?

The crankcase oil strainer performs several important functions within the engine lubrication system:

• Filters larger particles from the engine oil.
• Protects the oil pump from debris.
• Maintains unrestricted oil flow.
• Supports consistent oil pressure.
• Helps extend engine life.
• Prevents contaminants circulating through the lubrication system.
• Contributes to reliable engine performance.

Working alongside the oil filter and oil pump, the oil strainer helps ensure clean, uninterrupted lubrication reaches every critical engine component.

Why Replace the Crankcase Oil Strainer?

Over time, oil strainers can become contaminated or damaged through years of service.

Common reasons for replacement include:

• Sludge accumulation.
• Metal debris contamination.
• Damaged or distorted mesh. Corrosion.
  
• Engine rebuilds.
• Preventative maintenance.
• Oil starvation investigations.
• High-mileage servicing.

Replacing the oil strainer during engine maintenance helps ensure maximum lubrication efficiency and provides valuable insight into the condition of the engine by revealing any abnormal debris trapped within the screen.

Symptoms of a Worn or Contaminated Oil Strainer

Signs that the oil strainer should be inspected or replaced include:

• Reduced oil pressure.
• Sludge build-up inside the engine.
• Restricted oil flow.
• Oil pressure warning light.
• Metallic debris discovered during servicing.
• Engine lubrication concerns.
• Evidence of contamination during oil changes.
• Engine rebuild or restoration work.

Regular inspection of the oil strainer is considered good practice during major engine servicing.

Benefits

• Protects the oil pump from debris.
• Supports reliable oil circulation.
• Helps maintain correct oil pressure.
• Improves lubrication system reliability.
• Reduces the risk of oil starvation.
• Long-lasting construction.
• Factory-quality fitment.
• Excellent value OE Match replacement.

Installation Recommendations

When replacing the crankcase oil strainer, it is recommended to inspect or replace associated service components, including:

• Engine oil.
• Oil filter.
• Oil strainer gasket.
• Sump plate gasket.
• Drain plug sealing washer.
• Oil pump pick-up.
• Oil pressure relief valve.
• Oil lines and fittings.

Always refill the engine with the correct Porsche-approved engine oil and inspect the removed strainer for signs of excessive metal particles or debris that may indicate internal engine wear.

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

93010731400

The product you are viewing cross references to these numbers

Sump gasket
This Porsche Genuine OE Sump Gasket is an original factory oil strainer / sump plate sealing gasket designed for a wide range of classic air-cooled Porsche engines. This gasket fits between the engine sump plate (oil strainer cover) and the engine crankcase, creating a leak-free seal within the engine lubrication system. It is commonly referred to as an oil strainer gasket, sump plate gasket, or oil sump gasket.
Sold each,  2 gaskets required per engine. 

Fits:
Porsche 911 1965 - 1989
Porsche 930 Turbo 1975 - 1989
Porsche 964 1989 - 1994
Porsche 993 1994 - 1998
Porsche 914 1970 - 1976

Diagram ref no 42.

Cross Reference / Superseded Numbers: 90110139100 / 93010139100 / 93010139101

The sump gasket seals the joint between the engine sump plate and crankcase, preventing engine oil leaks while maintaining proper oil circulation and pressure. It is used during servicing of the oil strainer and sump plate assembly, ensuring a reliable seal after removal or maintenance.

Functions & Technical Role
• Oil sealing: Prevents leaks around the sump plate and oil strainer
• Pressure retention: Helps maintain correct lubrication system integrity
• Service component: Replaced whenever the sump plate is removed
• Engine protection: Supports proper oil containment and circulation
• OEM specification: Manufactured to Porsche factory dimensions and material standards

Fitment / Position on car
•  Fitting position: Engine lubrication system
•  Location: Between the oil sump plate / oil strainer cover and engine case
•  System: Engine oil circulation and filtration

Over time, sump gaskets can become:
•  Compressed or brittle
•  Damaged during removal
•  Unable to seal properly after reuse

A failing gasket can lead to:
•  Engine oil leaks
•  Reduced oil retention
•  Contamination around the sump plate area

 Replacing with a genuine Porsche OE gasket ensures proper sealing and helps protect the engine lubrication system.

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

93010139101

The product you are viewing cross references to these numbers

Oil strainer. Porsche 911 1965-77 / 914-6
Old type design.

Fits:
Porsche 911 1965-83
Porsche 911 (930) Turbo 1975-77
Porsche 914-6 1970-76

Diagram ref no 38

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

90110138002

The product you are viewing cross references to these numbers