Oil Tank

Oil Tank.

Fits:
Porsche 911 2.7L / 3.0L (SC) and 3.2L 1974-89
Please note pre '78 models might require oil tank adapter kit as it may vary from original tank in the car.

May need this:
Cap – 034133335D
Hose clip – PCG51219802

Covers Porsche Old OE Numbers:
91110700620, 91110700621, 91110700622, 91110700624, 91110700626, 91110700630,

Click picture for large parts diagram.
Diagram Ref No 1.

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Related, superseded, cross reference or alternative numbers for comparison.

91110700631

The product you are viewing cross references to these numbers

Oil tank. Painted stainless steel and pipes in brass.
Only for manual gearbox cars

Fits:
Porsche 911 (3.0L-3.2L) 08/1977-07/1989

Data from supplier fits:
3.0L SC Carrera 07.1977 - 06.1980
3.0L SC Carrera 09.1979 - 06.1980
3.0L SC Carrera 03.1974 - 10.1983
3.0L SC 08.1980 - 07.1983
3.2L 08.1986 - 08.1989
3.2L SC Carrera 02.1984 - 06.1987
3.2L SC Carrera 08.1983 - 08.1989

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Related, superseded, cross reference or alternative numbers for comparison.

91110700631

The product you are viewing cross references to these numbers

Oil Filler Cap and O-ring

Fits:
Porsche 911 1978-89
Porsche 964 1989-94
Porsche 968 1992-95
Porsche 924S 1986-88
Porsche 944 2.7L 1989
Porsche 944 S2 3.0L 1989-91
Porsche 944 2.5L Turbo 1986-91
Porsche 944 2.5L Turbo S 1987-88
Porsche 928 S4 / GT / GTS 1987-95

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

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Related, superseded, cross reference or alternative numbers for comparison.

94410709101

The product you are viewing cross references to these numbers

Oil Filler Cap Seal 

High-quality replacement oil filler cap seal designed for a wide range of Porsche models.

This gasket fits within the oil filler cap, ensuring a tight and secure seal to prevent oil leaks and protect the engine from contamination. It is an essential component for maintaining proper engine sealing and cleanliness.

Fits:

• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988
• Porsche 968 3.0L 1992-94
• Porsche 968 Sport 3.0L 1994-95
• Porsche 968 CS 3.0L 1993-95
• Porsche 968 Turbo S 3.0L 1993-94
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

Diagram ref no 12

Manufactured to OEM specifications, this seal provides precise fitment and reliable long-term performance—ideal for routine maintenance or resolving oil seepage issues.

Key Features

• Direct replacement oil filler cap seal
• Suitable for multiple Porsche models
• Ensures secure sealing of oil filler cap
• OEM-style fit and performance
• Durable material resistant to heat and oil
• Ideal for maintenance and leak prevention

Function and Purpose

This seal ensures a proper closure of the oil filler cap.

It helps to:

• Prevent engine oil leaks
• Maintain engine cleanliness
• Protect against dirt and contamination
• Support consistent engine performance

Why Replace Your Oil Filler Cap Seal

Over time, seals can degrade due to heat and oil exposure.

Common issues include:

• Oil seepage around the filler cap
• Hardened or cracked seal material
• Reduced sealing effectiveness
• Increased risk of contamination

Replacing the seal restores proper engine sealing and prevents leaks.

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

99970184641

The product you are viewing cross references to these numbers

Oil Filler Cap.
The OE MATCH Oil Filler Cap is a replacement engine oil filler cap designed for compatible Porsche applications. Installed at the engine's oil filling point, the cap closes and seals the opening after engine oil has been added.

Fits:

• Porsche 911 SC 1974-83 SPORTMATIC ONLY
• Porsche 911 Turbo (3.3L) 09/1977-07/1989
• Porsche 964 1989-94
• Porsche 968 1992-95
• Porsche 924S 1986-88
• Porsche 944 2.7L 1989
• Porsche 944 S2 3.0L 1989-91
• Porsche 944 2.5L Turbo 1986-91
• Porsche 944 2.5L Turbo S 1987-88
• Porsche 928 S4 / GT / GTS 1987-95

Although relatively simple, the oil filler cap performs an important sealing function. A correctly fitted cap helps prevent engine oil from escaping while protecting the lubrication system from dirt, moisture and other external contamination.  

What This Product Does:
The oil filler cap seals the opening used when adding engine oil.

Once installed correctly, it helps:

• Close the engine oil filling point
• Prevent oil from splashing or escaping
• Reduce the risk of dirt entering the engine
• Reduce moisture and external contamination
• Maintain the intended sealing of the lubrication system
• Keep the engine bay cleaner
• Provide convenient access during oil servicing

The cap must fit securely and its sealing surface must remain in good condition.

Symptoms Of Wear Or Failure:
Oil filler caps are exposed to engine heat, oil vapour and repeated removal during servicing. Over time, the cap or its sealing components can deteriorate.

Common symptoms include:

• Oil residue around the filler opening
• Oil leaking or misting around the cap
• Oil staining nearby engine components
• Cap becoming loose
• Cap no longer tightening securely
• Cracked or damaged cap
• Hardened or deteriorated sealing surface
• Damaged threads or retaining features
• Cap becoming difficult to remove or install
• Visible deformation
• Missing oil filler cap

Any persistent oil leakage around the filler opening should be investigated rather than simply cleaned away.

Why Replacement Matters:
Replacing a worn or damaged oil filler cap helps maintain the integrity and cleanliness of the engine lubrication system.

A new cap can help:

• Restore a secure seal
• Prevent oil leakage around the filler opening
• Reduce oil mist in the engine compartment
• Protect against dirt and moisture
• Keep surrounding engine components cleaner
• Replace cracked or deteriorated material
• Restore secure engagement with the filler opening
• Maintain reliable access for routine oil servicing

A missing or severely damaged filler cap should be replaced promptly.

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

94410709101

The product you are viewing cross references to these numbers

Oil Tank Cap Bayonet fitting type

Fits:
Porsche 911 1973-86*
*fit oil tank 9111070061, 91110700620, 91110700630

Porsche 993 1994-98

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

91110707204

The product you are viewing cross references to these numbers

Oil Tank Cap Bayonet Fitting Type.

The OE MATCH Oil Tank Cap – Bayonet Fitting Type is a replacement engine oil tank filler cap designed for selected air-cooled Porsche 911 and Porsche 993 models equipped with the corresponding dry-sump lubrication system.

Fits:
Porsche 911 1978-86*
*fit oil tank 9111070061, 91110700620, 91110707203
Porsche 911 1970-98

Manufactured to match the original equipment fitting arrangement, this cap provides a secure closure for the external engine oil tank's filler opening, helping protect the lubrication system from dirt, dust, moisture and other environmental contaminants.

Unlike conventional engines that store most of their lubricating oil in a sump beneath the crankshaft, the air-cooled Porsche 911 uses a dry-sump lubrication system with a separate oil reservoir.

This external oil tank stores the engine oil and forms an important part of the circulation system that supplies lubrication to the engine's moving components.

The oil tank filler cap allows access to the reservoir when topping up engine oil or carrying out routine servicing.

Its bayonet-style fastening mechanism is designed to engage with the corresponding oil tank filler neck, providing a secure and convenient closure.

The correct fitting and condition of the oil tank cap are important for maintaining a clean, properly enclosed oil reservoir.

Over time, an original oil tank cap may deteriorate due to repeated removal, exposure to heat, oil residue, vibration and natural ageing. The sealing surface may become damaged, while the locking tabs or bayonet mechanism may become worn or distorted.

A loose, damaged or incorrectly fitting oil tank cap may allow oil mist or residue to escape around the filler neck and permit contaminants to enter the tank.

Replacing a deteriorated cap with the OE MATCH Oil Tank Cap 91110707204/1 helps restore secure closure of the oil filler opening, maintain the cleanliness of the lubrication system and preserve the original Porsche oil tank arrangement.

Ideal for routine servicing, oil tank refurbishment, engine bay restoration and classic Porsche maintenance.

What This Product Does:
The oil tank cap provides a removable closure for the engine oil reservoir's filler opening.

Its primary functions include:

• Closes the Oil Filler Opening: Provides a secure cover for the external engine oil tank.
• Helps Prevent Contamination: Reduces the entry of dust, dirt and debris during normal vehicle operation.
• Reduces Moisture Ingress: Helps prevent rainwater, splashes and other external moisture from entering through the filler opening.
• Provides Secure Bayonet Engagement: Uses the corresponding bayonet-style locking mechanism to retain the cap on the filler neck.
• Helps Contain Oil Mist: Reduces the escape of oil mist and minor oil residue around the filler opening.
• Maintains Oil Tank Cleanliness: Helps protect the oil stored within the dry-sump lubrication reservoir.
• Supports Routine Oil Servicing: Can be removed to allow engine oil to be added through the correct filler point.
• Maintains Original Equipment Fitment: Preserves the factory-style oil tank cap arrangement.
• Protects the Filler Neck: Covers the opening when oil is not being added.
• Supports Lubrication System Maintenance: Helps maintain a clean and properly closed oil reservoir.

Symptoms Of Wear Or Failure:
The oil tank filler cap is regularly removed during maintenance and is exposed to heat, engine oil and vibration.

Over time, the locking mechanism and sealing surfaces may deteriorate.

Common symptoms of a worn or failing oil tank cap include:

• Loose-Fitting Cap: The cap may not sit securely on the oil tank filler neck.
• Difficulty Locking the Cap: The bayonet tabs may no longer engage smoothly or correctly.
• Cap Not Remaining Secure: A damaged locking arrangement may allow the cap to loosen.
• Worn Bayonet Tabs: Repeated operation or incorrect installation may wear the retaining surfaces.
• Damaged Sealing Surface: The cap may no longer make proper contact with the filler neck.
• Hardened or Deteriorated Seal: Where a sealing element is fitted, ageing may cause it to become brittle, flattened or damaged.
• Oil Residue Around the Filler Neck: Oil mist or seepage may appear around a cap that is not closing correctly.
• Oil Smell in the Engine Compartment: Oil vapours escaping around the filler opening may produce a noticeable odour.
• Visible Cracks or Deformation: Physical damage may prevent the cap from fitting or locking correctly.
• Corrosion or Deterioration: Age-related damage may affect the cap's locking or contact surfaces.
• Missing Oil Tank Cap: The original cap may have been misplaced during servicing.
• Incorrect Replacement Cap: A cap with the wrong locking arrangement may not fit the oil tank correctly.
• Contamination Around the Filler Opening: Dirt and debris may accumulate where the filler neck is not adequately covered.

Why Replacement Matters:
Replacing a worn, damaged or missing oil tank cap is important for maintaining the cleanliness and correct closure of the dry-sump lubrication system.

• Restores Secure Oil Tank Closure: Replaces a loose or damaged cap with the correct bayonet-style fitting.
• Helps Prevent Dirt Ingress: Protects the oil reservoir against external contamination.
• Reduces Moisture Exposure: Helps prevent water and moisture entering through the filler opening.
• Maintains Oil Cleanliness: Supports the condition of the oil stored within the external reservoir.
• Reduces Oil Mist Escape: Helps contain oil mist and minor seepage at the filler neck where the cap is responsible.
• Supports Reliable Cap Retention: Provides the specified locking engagement for compatible oil tanks.
• Maintains Original Equipment Appearance: Restores the factory-style filler cap arrangement.
• Protects Lubrication System Components: Helps prevent foreign material entering the oil circuit through the filler neck.
• Improves Servicing Convenience: Provides a correctly fitting cap for routine oil top-ups.
• Supports Preventative Maintenance: Addresses wear before the cap becomes insecure or is lost.
• Original Equipment-Style Fitment: Designed to correspond with the specified Porsche bayonet filler arrangement.
• Suitable for Engine Bay Restoration: Helps maintain the original appearance of classic Porsche oil tank installations.
• Cost-Effective Replacement: A relatively simple component that helps protect an important lubrication system.

The external oil tank is a critical part of the dry-sump lubrication system used in air-cooled Porsche engines.

Keeping the oil reservoir properly closed helps prevent foreign material from entering the oil supply.

Dirt, water or other contamination introduced through an open or improperly covered filler neck can affect lubricant cleanliness and may contribute to unwanted wear if it circulates through the engine.

A damaged cap may also allow oil residue to accumulate around the filler opening, making the engine compartment harder to keep clean and potentially obscuring other leaks.

Although replacing the filler cap will not cure unrelated oil leaks or lubrication problems, fitting the correct cap restores an important protective feature of the oil tank.

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

91110707204

The product you are viewing cross references to these numbers

Oil tank cap gasket.

Fits:
Porsche 911 1984 - 1989
Porsche 964 1989 - 1994
Porsche 924S 1986 - 1988
Porsche 928 1987 - 1995
Porsche 944 1985 - 1991
Porsche 968 1992 - 1995

Diagram ref no 12

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

99970184641

The product you are viewing cross references to these numbers

Oil tank cap gasket.

Fits:
Porsche 911 1978-86
Porsche 993 1994-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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

93010727201

The product you are viewing cross references to these numbers

Oil tank cap gasket.

Fits:
Porsche 356 B-T6 / C
Porsche 911 1965-86
Porsche 914 1970-76
Porsche 993 1994-98

Diagram ref no 12

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

93010727201

The product you are viewing cross references to these numbers

Oil Tank Drain Plug. Porsche 911 1965-89

Fits:
Porsche 911 1965-89

Click 'Zoom in' for large parts diagram.
Diagram ref no 11.

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

91110717603

The product you are viewing cross references to these numbers

Oil tank drain plug. Galvanized. M22 x 1.5 x 13.5

Fits:
Porsche 911 1965-89

Click 'Zoom in' for large parts diagram.
Diagram ref no 11.

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

91110717603

The product you are viewing cross references to these numbers

Gasket between oil tank, oil filter and inner rear wing.

Fits:
Porsche 911 1973-89
Porsche 911 (930) Turbo 1975-89

Click 'Zoom in' for large parts diagram.
Diagram Ref No 13.

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

91110719203

The product you are viewing cross references to these numbers

Oil tank gasket. 
This precision-cut gasket seals the connection between the outer oil reservoir and the inner fender, preventing oil leaks and maintaining proper system pressure.

Fits:
Porsche 911 1973 - 1989
Porsche 911 (930) Turbo 1975 - 1989

Diagram Ref No 13.

As the oil tank gasket ages, it becomes brittle, compressed, or cracked from heat cycles and vibration. This leads to oil seepage around the tank area, creating drips beneath the car, engine-bay contamination, and potential loss of oil pressure. Replacing the gasket restores a proper seal, prevents oil leaks, and helps maintain the health and cleanliness of the lubrication system.

Replace the oil tank gasket when:
• You notice oil drips or seepage around the oil tank
• The gasket appears dry, brittle, cracked, or crushed
• The oil tank is being serviced or removed
• You smell oil fumes from the rear right side of the vehicle
• Oil pressure seems inconsistent due to possible leakage
• Performing a restoration or major engine/oil system refresh

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

91110719203

The product you are viewing cross references to these numbers

Stone guard for oil tank 

Fits:
Porsche 911 - 1974 to 1989

Protect the engine oil tank from stones and debris with this stone guard

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

91110714100

The product you are viewing cross references to these numbers