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Oil / Air Separator Pipe. Porsche Boxster 986 2.5L ❭ 99610714506
- Porsche Boxster 986 2.5L 1997-99
Fits:
Porsche Boxster 986 2.5L 1999
Vehicles with chassis numbers from 65X01420
Diagram Ref No 5.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610714506
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Engine oil separator also known as a crankcase vent valve or AOS. It functions as part of the engine’s positive crankcase ventilation (PCV) system, managing and separating blow-by gases and oil vapour to help maintain engine performance and emissions compliance.
Fits:
Porsche Boxster 986 2003 - 2004
Porsche Boxster 987.1 2005 - 2008
Porsche Cayman 987C.1 2005 - 2008
Diagram Ref No 1.
The AOS is basically a small diaphragm distillery which distills the minute amounts of oil mist in the crankcase, liquifies it and sends it back to the crankcase. The "clean" air is now sent into the air intake (after the throttle body) to be burned off by the engine.
When the AOS starts to fail it cannot separate all of the oil out of the mist and some liquid oil is sent to the air intake.
A few drops of oil is enough to generate the GREAT SMOKE BOMB for which our cars are famous for.
A big smoke bomb once in a while is completely normal, due to the architecture of the flat-6 engine, which may let a drop of oil flow into one of the combustion chambers sporadically.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610702602
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01

Fits:
Porsche 996 1998-02 3.4L
Porsche Boxster 986
Click 'Zoom in' for large parts diagram.
Diagram Ref No 10.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610723752
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05

Fits:
Porsche 986 Boxster - 1997 to 2004
Porsche 996 - 1997 to 2005
Porsche 996 turbo - 2000 to 2005
- Guaranteed fitment
- Helps prevent harmful fuel vapors from escaping into the atmosphere
- Failing Vapor Canister Purge Valve can create a vacuum leak and cause rough idle.
- Helps restore proper air to fuel ratio for optimal gas mileage.
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660521301
The product you are viewing cross references to these numbers
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