Oil level sender cork gasket. Porsche 911 1978-89  ❭  91420189100

Oil Level Sender Unit Cork Gasket

Prevent oil leaks and maintain the integrity of your Porsche dry sump lubrication system with this OE Match Oil Level Sender Unit Cork Gasket. Designed for Porsche 911 models from 1965 to 1989, this gasket provides the critical seal between the oil level sender unit and the external oil tank.

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 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)

The oil level sender unit is responsible for monitoring the oil level within the tank and transmitting this information to the dashboard oil level gauge. The cork gasket creates a leak-free seal around the sender flange, preventing oil seepage while maintaining accurate oil level monitoring.

Although small and inexpensive, this gasket plays an important role in keeping the oil system properly sealed. During maintenance, sender replacement or oil tank restoration work, fitting a new gasket is highly recommended to prevent leaks and ensure reliable operation.

What Does an Oil Level Sender Unit Cork Gasket Do?

The gasket sits between the oil level sender unit and the oil tank mounting surface.

Its primary functions include:

• Creating a leak-proof seal
• Preventing oil seepage around the sender unit
• Maintaining oil tank integrity
• Supporting accurate oil level monitoring
• Preventing contamination from entering the oil tank
• Protecting surrounding engine bay components from oil leaks

A properly sealed sender unit helps maintain a clean engine bay and accurate oil system operation.

Why Do Oil Level Sender Gaskets Fail?

Cork gaskets naturally compress over time and are constantly exposed to oil, heat and vibration.

Common causes of failure include:

• Age-related hardening
• Compression set
• Shrinkage over time
• Heat cycling
• Oil saturation
• Improper installation
• Damage during sender removal
• Long-term storage deterioration

As the gasket loses elasticity, oil can begin to seep around the sender mounting flange.

When Should the Gasket Be Replaced?

The gasket should always be replaced whenever the oil level sender unit is removed.

Common signs of failure include:

• Oil leaks around the oil tank sender unit
• Oil residue on the oil tank
• Oil staining in the engine bay
• Perished or brittle gasket material
• Sender unit removal during servicing
• Oil tank refurbishment projects
• Oil level sender replacement

Replacing the gasket during routine maintenance is inexpensive insurance against future oil leaks.

Why Replacement Matters

A leaking oil sender gasket may appear minor but can lead to persistent oil leaks and unnecessary mess within the engine bay.

Benefits of replacement include:

• Prevents oil leaks
• Maintains proper oil tank sealing
• Protects engine bay components
• Supports accurate oil level monitoring
• Improves reliability
• Reduces maintenance clean-up
• Ideal for restoration projects
• Restores factory sealing performance

For classic Porsche 911 models, maintaining the dry sump oil system is essential for both reliability and originality.