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Porsche // 928 (1978-1995) // 928GT 5.0L 1989-91
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- 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
Round oil return tube O-ring used at the outer ends of the crankcase oil distribution / return tubes. Each tube uses two seals, and a complete engine typically requires multiple O-rings depending on tube type and configuration (often eight per engine on many 911/964/993 applications).
Sold each.
Fits:
Porsche 911 1970 - 1989
Porsche 964 1989 - 1994
Porsche 993 1994 - 1998
Diagram ref no 14.
This seal provides a leak-tight joint between the oil return tube and the crankcase or associated oil galleries. By sealing the tube ends, it:
• Prevents engine oil leaks at the tube junctions.
• Helps maintain correct oil circulation and system pressure.
• Keeps oil off the heat exchangers, exhaust and underside of the engine, reducing smells, smoke and contamination.
With age, heat and constant oil exposure, original O-rings can harden, flatten, crack or shrink. When they fail:
• Oil begins to weep or drip from the crankcase / tube junctions.
• The underside of the engine, heat exchangers and exhaust can become oil-soaked, causing burning smells and smoke.
• You may see oil spots under the car and gradual oil loss between services.
Replacing tired seals is a low-cost, high-impact fix that significantly reduces leaks and keeps the engine bay cleaner.
When to Replace
Consider replacing these oil tube seals if:
• You see oil leaks or dampness around the oil return tubes or crankcase unions.
• The engine is undergoing an oil return tube replacement (solid or collapsible).
• You’re performing an engine refresh, top-end rebuild, or major oil system service.
• The car shows persistent oil drips on the floor despite other seals being renewed.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9997071124A
The product you are viewing cross references to these numbers
- Porsche 964 (911) TURBO 3.3L 1991-93
- 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
To Fit:
Porsche 911 (964 Turbo) 1990-1994 3.3 turbo Engines
The kit contains all necessary hose clamps to install the specified hose kit. The included clamps are a high quality standard design type in all stainless steel (W4 class) with a stamped band to minimize impact on hose surface.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
DO88-CLAMPKIT158
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
Length: 21.5mm, Diameter: 6.2mm
Fits:
Porsche 911 SC - 1978 to 1983 (6 required)
Porsche 911 3.2 Carrera - 1984 to 1989 (6 required)
Porsche 928 S4 / 928 GT - 1987 to 1992 (8 required)
Diagram ref no 15
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110101101
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
OE Match oil splash valve for selected Porsche 911 and 928 engines. This small internal engine lubrication component helps control and direct engine oil within the crankcase, supporting effective lubrication and temperature management of internal moving components.
Sold individually
Length: 21.5mm, Diameter: 6.2mm
Fits:
Porsche 911 SC - 1978 to 1983 (6 required)
Porsche 911 3.2 Carrera - 1984 to 1989 (6 required)
Porsche 928 S4 / 928 GT - 1987 to 1992 (8 required)
Diagram ref no 15
The oil splash valve is fitted within the engine crankcase as part of the internal lubrication system. It provides a controlled oil supply to the relevant internal engine area, helping support reliable lubrication during engine operation.
It is particularly suitable for engine rebuilds where the original valves are damaged, blocked, worn or being renewed as part of a complete crankcase overhaul.
What this part does
- Forms part of the internal engine oil system
- Helps direct and control engine oil flow
- Supports lubrication of internal engine components
- Contributes to effective internal engine cooling
- Suitable for engine rebuild and crankcase servicing
- Replaces damaged, blocked or deteriorated original valves
- OE Match replacement for classic Porsche engine applications.
Why Replace This Part?
Oil splash valves operate within the engine lubrication system and can become contaminated or damaged over time. During an engine rebuild, their condition should be checked to ensure that oil can flow correctly through the intended lubrication points.
A blocked or damaged valve may reduce effective oil delivery to the associated internal components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110101101
The product you are viewing cross references to these numbers
- 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 944 2.5L 8V 1982-87
- 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 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
Fits:
Porsche 928 - 1978 to 1986
Porsche 924 - 1976 to 1986
Porsche 924S - 1986 to 1988
Porsche 944 - 1982 to 1991
Porsche 968 - 1992 to 1995
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99951255400
The product you are viewing cross references to these numbers