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Porsche // 928 (1978-1995) // 928 4.5L 1978-82
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Oil Return Pipe.
The Genuine Porsche Oil Return Pipe (Part Number: 94810707855) is an original equipment engine lubrication component designed for the Porsche Cayenne (955 / 9PA) Turbo 4.5L V8 models manufactured between 2003 and 2006.
Fits:
Diagram Ref No 26
Manufactured to Porsche's original equipment specifications, this oil return pipe forms part of the turbocharger lubrication system, providing a dedicated passage for used engine oil to drain away from the turbocharger assembly and return to the engine's oil circulation system.
Designed specifically for the turbocharger serving cylinders 1–4, the pipe helps maintain efficient oil drainage, preventing excessive oil accumulation within the turbocharger bearing housing.
The Porsche Cayenne Turbo's twin-turbocharged V8 engine relies on continuous engine oil circulation to lubricate and cool the turbocharger bearings. After passing through the turbocharger, the oil must return efficiently to the engine to maintain reliable lubrication and prevent excessive pressure within the bearing housing.
Over time, the original oil return pipe may deteriorate due to heat exposure, vibration, corrosion or physical damage. Cracked pipework, damaged connections or deteriorated seals can result in oil leakage and potentially affect turbocharger reliability.
Replacing a damaged or leaking oil return pipe with a Genuine Porsche component helps restore the integrity of the turbocharger oil return system and maintain dependable engine operation.
Ideal for turbocharger servicing, engine oil leak repairs, lubrication system maintenance and Porsche Cayenne restoration projects, this Genuine Porsche oil return pipe provides a factory-specified replacement for compatible vehicles.
What This Product Does:
The oil return pipe is an essential component of the Porsche Cayenne Turbo's turbocharger lubrication system.
Its primary function is to provide a route for engine oil to drain away from the turbocharger after lubricating and cooling the internal bearing assembly.
During operation, pressurised engine oil is delivered to the turbocharger bearings, where it helps reduce friction and carry away heat generated by the rapidly rotating turbocharger shaft.
After passing through the bearing housing, the oil must be returned to the engine's lubrication circuit.
The oil return pipe allows this oil to flow away from the turbocharger, supporting continuous lubrication and preventing excessive oil accumulation.
Its main functions include:
- Returning engine oil: Provides a dedicated passage for used oil to flow away from the turbocharger and back towards the engine.
- Supporting turbocharger lubrication: Helps maintain continuous oil movement through the turbocharger bearing assembly.
- Preventing oil accumulation: Reduces the risk of excessive oil collecting within the turbocharger bearing housing.
- Supporting turbocharger cooling: Allows heated oil to leave the turbocharger and rejoin the engine lubrication circuit.
- Maintaining oil system integrity: Provides a secure connection within the turbocharger oil return arrangement.
- Preventing external oil leakage: Correctly fitted pipework and seals help contain engine oil.
- Protecting turbocharger components: Supports suitable oil drainage conditions for reliable turbocharger operation.
- Maintaining engine reliability: Helps preserve the intended oil circulation arrangement of Porsche's twin-turbocharged V8 engine.
Symptoms Of Wear Or Failure:
The turbocharger oil return pipe operates in a demanding environment, exposed to high temperatures, engine vibration, repeated thermal expansion and oil contamination.
Over time, the pipe, mounting points and associated sealing components may deteriorate.
Common symptoms of a worn or damaged oil return pipe include:
- Visible engine oil leaks: Cracked pipework, damaged connections or deteriorated seals may allow oil to escape around the turbocharger.
- Oil stains beneath the vehicle: Leaking oil may run down the engine and leave visible patches on the ground.
- Oil residue around the turbocharger: Damp or greasy deposits around the pipe connections may indicate oil seepage.
- Burning oil smell: Oil escaping from the return line may reach hot engine or exhaust components, producing a noticeable burning odour.
- Smoke from the engine compartment: Leaking oil contacting hot exhaust surfaces may generate smoke.
- Corrosion or surface deterioration: Exposure to moisture, road contaminants and repeated temperature changes may damage the pipe.
- Cracked or weakened pipework: Ageing, vibration or mechanical stress may cause cracks or deterioration around the connections.
- Damaged or loose fittings: Worn mounting hardware or damaged sealing surfaces may prevent secure attachment.
- Restricted oil drainage: A crushed, kinked or internally obstructed pipe may restrict oil returning from the turbocharger.
- Blue exhaust smoke: Severe oil drainage restrictions may contribute to oil passing through the turbocharger's internal sealing arrangement and entering the intake or exhaust system.
- Increased oil consumption: External leakage or oil drainage problems may contribute to abnormal engine oil loss.
- Abnormal turbocharger operation: Severe oil drainage problems may contribute to internal turbocharger lubrication issues and possible damage.
Why Replacement Matters:
Replacing a deteriorated turbocharger oil return pipe is important for maintaining reliable oil circulation, protecting the turbocharger assembly and preventing engine oil leakage.
A damaged or leaking pipe can allow engine oil to escape from the lubrication system, potentially reducing oil levels and exposing nearby engine components to contamination.
A restricted oil return passage may also prevent oil from draining efficiently from the turbocharger bearing housing. This can contribute to excessive oil accumulation and increase the risk of oil passing into the intake or exhaust system.
If left unresolved, serious oil drainage problems may contribute to turbocharger deterioration and expensive mechanical repairs.
Installing a Genuine Porsche replacement Oil Return Pipe helps to:
- Restore reliable oil drainage: Maintain an unobstructed oil return path from the turbocharger.
- Prevent engine oil leaks: Replace cracked, damaged or leaking pipework to restore secure oil containment.
- Protect the turbocharger: Help maintain the oil drainage conditions required for reliable bearing operation.
- Reduce excessive oil accumulation: Prevent oil from collecting unnecessarily within the turbocharger bearing housing.
- Maintain engine lubrication: Support the continuous circulation of oil through the engine and turbocharger system.
- Reduce burning oil smells: Help prevent leaking oil from contacting hot exhaust components.
- Protect surrounding components: Minimise oil contamination around the turbocharger and engine compartment.
- Improve long-term reliability: Replace ageing components before more serious leakage or restriction develops.
- Support turbocharger repairs: Provide replacement pipework during turbocharger removal, servicing or refurbishment.
- Maintain original Porsche specifications: Restore the intended oil return arrangement using a Genuine Porsche replacement.
- Reduce the risk of further damage: Address oil drainage or leakage faults before they contribute to secondary mechanical problems.
Replacement is particularly recommended when inspection identifies corrosion, cracking, damaged connections, oil leakage or restriction within the return pipe.
When replacing the oil return pipe, inspecting the corresponding turbocharger oil supply lines, breather components and associated sealing parts is advisable to ensure the complete lubrication system is functioning correctly.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810707855
The product you are viewing cross references to these numbers
- 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 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 914 (1970-1976)
Sold each
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
- 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 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 914 (1970-1976)
The Hex Head Bolt M8 x 16 is a versatile, high-strength fastener used in multiple locations across classic Porsche models—including the Porsche 911, 914, 924 and 928. As a critical component in securing brackets, covers, engine parts, underbody panels and suspension-related hardware, this bolt ensures structural integrity and reliability throughout the vehicle.
What This Bolt Does
The Hex Head Bolt M8 x 16 plays a crucial role in securing various mechanical and body components on a Porsche.
Common Functions
- Secures brackets, panels and trim pieces
- Anchors engine and drivetrain components
- Holds suspension hardware and mountings
- Fastens interior and underbody parts
- Provides structural rigidity where load-bearing fasteners are required
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90007508704
The product you are viewing cross references to these numbers