Engine Oil Tank. Porsche 911 1973-77  ❭  91110700630

Stainless Steel Engine Oil Tank 

Restore an essential part of your classic Porsche's lubrication system with this OE Match Stainless Steel Engine Oil Tank. Manufactured from painted stainless steel with brass pipes, this replacement tank provides a durable alternative to an ageing original oil reservoir and is particularly suitable for restoration, engine rebuild and long-term maintenance projects.

Fits:

• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

The oil tank is a vital component of the Porsche 911 dry-sump lubrication system, storing the engine oil externally and ensuring a reliable supply of lubricant is available to the air-cooled flat-six engine.

What Does the Oil Tank Do?

Unlike a conventional wet-sump engine, the classic Porsche 911 uses a dry-sump lubrication system where the majority of the engine oil is stored in a separate external tank.

Oil returning from the engine is pumped back into this reservoir before being circulated through the lubrication system again.

The oil tank therefore performs several important functions:

• Stores the engine's main oil supply
• Provides a reliable supply of oil to the engine
• Helps separate air from returning engine oil
• Helps reduce oil aeration and foaming
• Supports effective oil circulation
• Contributes to oil temperature management
• Helps maintain lubrication during acceleration, braking and cornering

Maintaining a clean, leak-free oil tank is therefore extremely important for the reliability and longevity of an air-cooled Porsche engine.

Why Choose a Stainless Steel Oil Tank?

Corrosion is one of the biggest problems affecting original classic Porsche oil tanks.

Stainless steel provides improved resistance to corrosion compared with conventional mild-steel construction, making this OE Match tank particularly attractive for restorations where long-term durability is important.

The tank is painted externally for additional protection and features brass pipework.

Why Do Oil Tanks Fail?

Original Porsche 911 oil tanks are now several decades old and can deteriorate both internally and externally.

Moisture, road dirt, temperature cycles and age can eventually cause corrosion, particularly around seams, mounting points and pipe connections.

Common causes of failure include:

• Internal corrosion
• External rust and corrosion
• Deterioration around seams and welded joints
• Corrosion around mounting points
• Oil leaks
• Damaged pipe connections
• Internal sludge and contamination
• Physical or accident damage
• Previous poor-quality welding or repairs
• General deterioration caused by age

Internal corrosion can be particularly difficult to detect because a tank may appear acceptable externally while deterioration is taking place inside.

When Should the Oil Tank Be Replaced?

Replacement should be considered when the existing tank can no longer provide a clean, secure and leak-free reservoir for the engine's oil supply.

Typical warning signs include:

• Visible oil leaks
• Heavy external corrosion
• Evidence of internal rust
• Corrosion around seams or mounting points
• Damaged or weakened pipe connections
• Persistent internal sludge or contamination
• Previous repairs of questionable quality
• Physical damage or deformation
• During a major engine rebuild or vehicle restoration

A badly corroded oil tank should not be ignored. Rust, debris and contamination entering the lubrication circuit can potentially damage expensive internal engine components.

Why Replace an Ageing Porsche 911 Oil Tank?

The dry-sump lubrication system is fundamental to the reliability of the air-cooled Porsche flat-six engine.

Replacing an ageing or corroded original tank helps restore the integrity of the lubrication system and provides confidence that clean engine oil is being stored in a secure, leak-free reservoir.

Choosing a stainless steel replacement also provides additional corrosion resistance, making it particularly suitable for classic Porsche 911s intended to remain in service for many years.

Stainless Steel Oil Tanks & Dry-Sump Lubrication Parts

The dry-sump lubrication system is one of the defining engineering features of the classic air-cooled Porsche 911, and the external oil tank plays a critical role in maintaining a reliable engine oil supply.

As original tanks age, corrosion, leaks and internal contamination become increasingly important concerns. A stainless steel replacement offers an effective long-term solution, providing improved corrosion resistance while restoring a critical part of the lubrication system.

When replacing an oil tank, it is also advisable to inspect the associated oil hoses, hard lines, seals, breather hoses, filler components, filter connections and mounting hardware for deterioration or leakage.

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

91110700630

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