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- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
The OE Match S Hose Oil Cooler to Tank is a high-quality replacement hose designed to connect the engine oil cooler system to the oil tank in classic Porsche applications. Commonly referred to as the "S Hose" due to its distinctive shape, this component plays a critical role in the dry sump lubrication system by allowing oil to flow efficiently between the oil tank and engine cooling circuit.
Fits:
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Diagram Ref No 22
Manufactured from durable, oil-resistant rubber and engineered to OE specifications, this replacement hose provides reliable sealing, correct fitment and long-lasting performance. It is an essential component for maintaining proper oil circulation and protecting the engine from lubrication-related issues.
What This Product Does:
- Connects the oil tank to the engine oil cooler system.
- Allows the transfer of engine oil throughout the dry sump lubrication system.
- Maintains proper oil circulation and cooling efficiency.
- Helps regulate engine operating temperatures.
- Ensures a consistent supply of oil to critical engine components.
- Supports overall engine lubrication and longevity.
Symptoms Of Wear Or Failure:
- Oil leaks beneath the vehicle or around hose connections.
- Cracked, split or perished rubber.
- Soft, swollen or deteriorated hose material.
- Oil seepage around the hose body.
- Low engine oil levels due to leakage.
- Burning oil smells from oil contacting hot engine components.
- Reduced oil system efficiency.
- Visible ageing, hardening or deformation of the hose.
Why Replacement Matters:
- The S Hose is constantly exposed to hot engine oil, pressure fluctuations, engine vibration and age-related deterioration. Over time, the rubber can harden, crack or weaken, increasing the risk of sudden oil loss. Because this hose carries a significant volume of engine oil, failure can result in rapid oil leakage that may lead to severe engine damage if not addressed immediately.
- Replacing a worn or ageing S Hose helps maintain proper oil circulation, prevents potentially catastrophic oil leaks and protects vital engine components from lubrication failure. An OE Match replacement restores the integrity of the oil system and helps ensure reliable performance from your Porsche's dry sump engine.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110723300
The product you are viewing cross references to these numbers
- 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)
- 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 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
Collapsible oil tube kit for Porsche 911, 964 and 993 engines. Supplied as an assembled return tube with associated sealing components, intended as a direct-fit replacement where the original oil return tube has aged or started to leak.
Overview & Construction
This kit uses a telescopic tube design to mirror the layout of the original return assembly between the cylinder head/oil galleries and the crankcase or external oil tank, depending on application. The collapsible section allows the tube to be installed without splitting the crankcase, while the included O-rings and circlip provide axial retention and a radial seal at each end. The construction is aimed at withstanding typical air-cooled engine temperatures, oil exposure and vibration so that the tube can maintain a stable sealing interface over repeated heat cycles.
- Collapsible/telescopic tube body for in-situ installation
- Sealing rings for both ends of the tube
- Circlip for tube location and retention (where applicable)
- Designed around original routing and connection points on 911, 964 and 993 engines
- One kit services a single oil return position; four tubes are normally used per engine
Operational Symptoms
- Oil drips or wetness along the oil return tubes or at their joints to the crankcase or cam carrier
- Oil residue on heat exchangers, undertrays or the lower engine casing
- Smell of hot oil after driving, sometimes with light smoke where oil contacts hot exhaust parts
- Progressive oil consumption not explained by external gaskets or top-end components
- Leaks that become more evident after long, hot runs when oil is at full temperature
Replacement Rationale
On older air-cooled engines, rigid or early-pattern tubes can harden, corrode or lose tension at the sealing interfaces, leading to external leaks or reduced return flow from the heads back to the sump or tank. Replacing a tired tube with a collapsible assembly allows the return line to be renewed with the engine in situ, restoring a defined oil path and fresh sealing surfaces at both ends. This helps maintain predictable oil circulation, reduces the risk of oil mist on hot components, and can be combined with other oil system work during rebuilds or top-end refreshes to minimise repeat access.
Compatibility
- Porsche 911 2.0L 1965–1969
- Porsche 911 1970–1989
- Porsche 964 1989–1994
- Porsche 993 1994–1998
Support & Advice
Check the condition of all four return tubes when the engine is accessible, as similar age and exposure often mean that multiple tubes show seepage at the same time. Confirm fitment against your specific model year and engine variant before installation, and ensure all sealing surfaces are clean, undamaged and free from old O-ring material prior to assembly.
Search Context
Search context: Many searches use terms like 'genuine' or 'OEM'. This part is a compatible replacement engineered to match original specifications. It is not a Porsche Genuine Part.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010704001
The product you are viewing cross references to these numbers
- 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
Oil Pipe – Thermostat to Oil Filter
The Porsche 964 Oil Pipe from the thermostat to the oil
filter is a critical component within the engine's lubrication and oil cooling
system. Designed specifically for Porsche 964 models produced between 1989 and
1994, this oil line transfers engine oil between the thermostat assembly and
the oil filter housing, ensuring continuous oil circulation and filtration
before oil is distributed throughout the engine.
Fits:
- 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
Diagram Ref No 46
The Porsche 964 relies on a sophisticated dry-sump lubrication system that not only lubricates critical engine components but also assists in engine cooling. This oil pipe plays an important role in maintaining correct oil flow, pressure, and filtration efficiency, helping to protect the engine under both normal driving and high-performance conditions.
Whether you are restoring a Porsche 964, rebuilding an engine, or repairing a leaking oil system, replacing ageing oil pipes is essential for maintaining reliability and preventing costly engine damage.
What Does This Oil Pipe Do?
The thermostat-to-oil-filter pipe forms part of the engine's oil circulation circuit.
Its primary functions include:
- Transporting oil between the thermostat and oil filter housing
- Maintaining uninterrupted oil flow through the lubrication system
- Ensuring oil passes through filtration before recirculation
- Supporting stable oil pressure throughout the engine
- Assisting the operation of the Porsche dry-sump oil system
- Helping maintain proper engine cooling and lubrication
Without a properly functioning oil pipe, oil flow can be compromised, placing the engine at risk of lubrication issues and overheating.
Why Does This Oil Pipe Fail?
The oil pipe operates in a demanding environment where it is constantly exposed to heat cycles, oil pressure, vibration, road contamination, and age-related deterioration.
Common causes of failure include:
- Corrosion of metal pipe sections
- External damage from road debris
- Fatigue from vibration and engine movement
- Deterioration of sealing surfaces
- Cracked or weakened pipe connections
- Oil contamination and sludge build-up
- Damage during previous repairs or engine removal work
- Age-related wear on original factory-installed lines
As the vehicle ages, corrosion and fatigue become increasingly common, particularly on original oil system components.
Common Symptoms of a Failing Oil Pipe
Signs that the thermostat-to-oil-filter pipe may require
replacement include:
- Visible oil leaks
- Oil residue around the pipe or fittings
- Corrosion on exposed metal sections
- Reduced oil pressure
- Oil smells from the engine bay
- Damaged or crushed pipework
- Difficulty removing seized fittings during servicing
Because the oil system is vital to engine protection, even small leaks should be addressed promptly.
When Should You Replace It?
Replacement is recommended when:
- Oil leaks are present
- Corrosion becomes visible
- Pipe fittings become damaged or seized
- During engine rebuilds
- During oil thermostat replacement
- During major oil system refurbishment
- As part of preventative maintenance on ageing vehicles
- During restoration projects where long-term reliability is a priority
Replacing ageing oil lines before failure helps prevent oil loss, lubrication issues, and expensive engine repairs.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96420725414
The product you are viewing cross references to these numbers
- 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
Oil Pipe – Oil Filter Housing to Crankcase
The Porsche 964 Oil Pipe connects the oil filter
housing to the engine crankcase and forms an essential part of the Porsche 964
dry-sump lubrication system. This oil line allows filtered engine oil to be
transferred efficiently into the crankcase, ensuring critical internal engine
components receive the lubrication required for smooth operation, temperature
control, and long-term reliability.
Fits:
- 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
Diagram Ref No 54
On the Porsche 964, maintaining proper oil circulation is vital. The dry-sump lubrication system relies on a network of precisely engineered oil pipes to move oil throughout the engine, filtration system, oil tank, and cooling circuit. A damaged, leaking, or corroded oil pipe can compromise oil flow, reduce oil pressure, and potentially expose the engine to severe wear or damage.
Whether you are carrying out preventative maintenance, restoring a classic Porsche 964, or rebuilding an engine, replacing ageing oil system components helps preserve engine performance and reliability.
What Does This Oil Pipe Do?
The oil filter housing to crankcase pipe transfers filtered oil directly into the engine lubrication circuit after it has passed through the oil filter assembly.
Its functions include:
- Delivering filtered oil to the crankcase
- Maintaining continuous lubrication throughout the engine
- Supporting stable oil pressure
- Assisting proper operation of the dry-sump lubrication system
- Helping protect bearings, pistons, camshafts, and other critical components
- Supporting engine cooling through effective oil circulation
Without reliable oil flow through this pipe, engine lubrication efficiency can be significantly affected.
Why Does This Oil Pipe Fail?
The oil pipe is exposed to constant heat cycles, oil pressure, engine vibration, and environmental contaminants. Over time, these conditions can contribute to deterioration.
Common causes of failure include:
- Corrosion of metal pipe sections
- Age-related material fatigue
- Damage from road debris
- Cracked or weakened connections
- Oil leaks at joints or fittings
- Vibration-related stress fractures
- Damage during engine or oil system repairs
- Seized fittings caused by corrosion
As Porsche 964 models continue to age, original oil lines are increasingly susceptible to wear and deterioration.
Common Symptoms of a Failing Oil Pipe
Signs that the oil filter housing to crankcase pipe may
require replacement include:
- Visible oil leaks
- Oil residue around pipe connections
- Corrosion or rust on pipe surfaces
- Oil smells from the engine bay
- Damaged or crushed pipe sections
- Difficulty maintaining proper oil pressure
- Seized or damaged fittings during servicing
Because this component carries pressurised engine oil, any leak should be addressed immediately to avoid potential engine damage.
When Should You Replace It?
Replacement is recommended when:
- Oil leaks become visible
- Corrosion is identified during inspection
- Pipework becomes damaged or restricted
- During engine rebuilds
- During oil system refurbishment
- While replacing oil filter housing components
- As
preventoative maintenance on ageing vehicles
- During full restoration projectsil pipes
Replacing ageing before failure helps maintain oil pressure, improve reliability, and protect valuable engine components from unnecessary wear.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96420725216
The product you are viewing cross references to these numbers