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Fuel tank cap Genuine Porsche part 91110707204

Code: 91110707204

Genuine Porsche part

Fuel tank cap

The product code 91110707204 was also found on these diagrams

104-25 - fuel tank cap

engine lubrication 911 1973 ONWARDS

104-00 - fuel tank cap

engine lubrication oil pump 911 1978-83

104-01 - fuel tank cap with bayonet lock

Engine lubrication oil tank lines 911 1984-86

104-00 - fuel tank cap

Engine lubrication 911 1974-77

104-00 - fuel tank cap

engine lubrication 911 TURBO 1975-77

104-01 - fuel tank cap

oil tank lines 993 1994-98

Additional information:

• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.

Before purchasing thoroughly check part to confirm compatibility.

Related products

Engine oil pump. Porsche 911 1977-89

91110700805/1

Product Information

Oil Pump

The Porsche 911 & 911 turbo Oil Pump is one of the most critical components within the engine's dry-sump lubrication system. Responsible for circulating oil throughout the engine, the oil pump ensures that vital moving components receive a continuous supply of lubricating oil, helping to minimise friction, control temperatures, and protect against premature engine wear.

Fits:

Porsche 911 1974-1977 2.7L
Porsche 911 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)*

*Requires extra part No. 93010190200 Lid

Diagram Ref No 1

Unlike conventional wet-sump systems, Porsche's legendary dry-sump design relies heavily on the oil pump to both supply pressurised oil to the engine and scavenge oil back to the external oil tank. This constant circulation is essential for maintaining stable oil pressure under all driving conditions, particularly in high-performance and turbocharged applications.

Whether you're rebuilding an engine, restoring a classic Porsche, or replacing worn internal components, the 91110700805 oil pump plays a crucial role in maintaining engine reliability and long-term performance.

What Does the Oil Pump Do?

The oil pump is the heart of the Porsche lubrication system. It draws oil from the oil tank and distributes it under pressure to critical engine components including:

Crankshaft bearings
Connecting rod bearings
Camshafts and valve train components
Pistons and cylinders
Timing chains and associated components
Turbocharger lubrication systems (where applicable)

The pump also scavenges used oil from the engine and returns it to the oil tank, ensuring continuous circulation throughout the dry-sump system.

A correctly functioning oil pump helps:

Maintain stable oil pressure
Reduce internal engine wear
Support effective engine cooling
Ensure reliable lubrication under high-performance driving
Protect expensive engine components from damage

Why Does an Oil Pump Fail?

Although Porsche oil pumps are engineered for durability, wear can occur over time, especially in high-mileage engines or engines that have experienced poor maintenance.

Common causes of oil pump failure include:

Internal gear wear
Contamination from debris or metal particles
Oil starvation events
Poor maintenance history
Engine overheating
Excessive bearing material circulating through the oil system
Damage following engine failure
Wear to internal clearances reducing oil pressure

As oil pumps age, efficiency can decline, leading to reduced oil pressure and compromised lubrication performance.

When Should You Replace It?

Replacement should be considered whenever there are signs of oil pressure issues, excessive internal wear, or during major engine rebuild work.

Typical replacement scenarios include:

Full engine rebuilds
Low oil pressure diagnosis
Internal engine failure repairs
High-mileage engine restorations
Excessive wear found during engine inspection
Metal contamination within the lubrication system
Preventative replacement during performance engine builds

Because oil pump failure can lead to catastrophic engine damage, replacing a worn unit during rebuild work is often considered inexpensive insurance compared to the cost of a complete engine failure.

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

91110700805

PS9314

91110700805

1613100200

The product you are viewing cross references to these numbers

Radiator engine oil cooler front "Snake Type". Porsche 911 1970-73

91110704700/1

Product Information

Radiator Engine Oil Cooler Front "Snake Type"

Maintain the correct operating temperature of your classic air-cooled Porsche with this OE Match Front Engine Oil Cooler, commonly known as the Snake Type or Trombone Oil Cooler. Designed as a direct replacement for the original factory oil cooler fitted to Porsche 911 models from 1970-1973, this OE-quality component restores efficient engine oil cooling while preserving the originality of your vehicle.

Fits:

Porsche 911 1965-1968 2.0L / 912 SWB (F)
Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

Diagram ref no 22

Unlike later finned oil coolers, the trombone oil cooler uses a continuous loop of oil pipe mounted in the front wheel arch. As airflow passes over the curved tube, excess heat is dissipated from the engine oil before it returns to the engine. Its distinctive looped design earned it the nickname "Trombone Oil Cooler", and it remains an iconic feature of early long-wheelbase Porsche 911 models.

Manufactured to OE specifications, this replacement oil cooler offers excellent fitment, corrosion resistance and long-term durability, making it ideal for restorations, maintenance or replacing damaged original units.

What Does the Oil Cooler Do?

Engine oil performs two vital functions in an air-cooled Porsche: lubricating internal engine components and carrying away excess heat.

The front-mounted Snake Type oil cooler helps to:

Reduce engine oil temperature.
Improve lubrication under demanding driving conditions.
Protect internal engine components from excessive heat.
Maintain stable oil viscosity.
Increase engine reliability and longevity.
Support consistent engine performance during warm weather and spirited driving.

Although simple in design, the trombone cooler provides a significant improvement in oil temperature control compared to engines without a front-mounted oil cooler.

Why Do Oil Coolers Need Replacing?

After decades of service, oil coolers can become damaged or less effective due to:

External corrosion.
Stone impacts and road debris.
Internal contamination.
Oil leaks caused by corrosion or physical damage.
Accident damage.
Previous poor repairs or deformation of the cooling loop.

Replacing a damaged oil cooler helps maintain correct oil temperatures while preventing potentially expensive engine damage caused by oil loss.

Symptoms of a Failing Oil Cooler

Common warning signs include:

Visible oil leaks around the cooler.
Rising engine oil temperatures.
Oil residue around the front wheel arch.
Corroded or damaged cooling tube.
Reduced cooling efficiency.
Oil pressure concerns caused by oil loss.
Physical damage from road debris.

If any oil leakage is present, the cooling system should be inspected immediately.

When Should the Trombone Oil Cooler Be Replaced?

Replacement is recommended when:

Oil leaks develop.
Corrosion weakens the cooling tube.
Accident damage has occurred.
Restoring a classic Porsche to factory specification.
Replacing damaged front oil lines.
Carrying out a complete oil cooling system overhaul.

Replacing ageing cooling components helps maintain reliable engine temperature control and protects your investment.

Why Choose an OE Match Oil Cooler?

Our OE Match Snake Type oil cooler has been engineered to closely replicate the original Porsche component.

Benefits include:

Correct Trombone (Snake Type) design.
OE-quality construction.
Precision-formed cooling loop.
Corrosion-resistant finish.
Excellent oil flow characteristics.
Straightforward installation using factory mounting points.
Ideal for restorations and originality-focused vehicles.

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

91110704700

91110704700

91110704600

The product you are viewing cross references to these numbers

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Fuel tank cap Genuine Porsche part 91110707204