Porsche 996 aos There are a list of Tech articles for many models including the 996. The bummer is that it was replaced 3 years ago at around 70K miles. Our UAOS-AL 99YM kit also includes the optional 15mm rubber elbow and The AOS, or air oil separator, is a part of the PCV system on a modern Porsche sports car engine found in Boxster, Cayman, and 911 models. Nov 15, 2022 · Porsche 992: 2018- Porsche 991: 2011-2019 Porsche 997: 2004-2012 Porsche 996: 1997-2005 Porsche 993: 1993-1998 Porsche 964: 1989-1993 Porsche Carrera 3. There are two hex head bolts that mount it to the head from the top, the two snap on PCV fittings, and a spring clamp on the hose underneath (this is in place of the bellows on the previous AOS). 28 986 Forum - The Community for Porsche Boxster & Cayman Owners Nov 19, 2022 · In this video i fix the red Porsche 996 , this car was mixing coolant with the oil ,and the oil with the coolant i replaced the oil cooler and air oil separa Dec 16, 2023 · The Air-Oil Separator (AOS) in your Porsche is a crucial component that manages the separation of air and oil vapors within the engine’s crankcase ventilation system. It was on My explanation for why I'm using the UAOS Oct 3, 2007 · 996 Series (Carrera, GT3-1, TT, GT2) (MY1998 - 2005) and we offer a lot in return to those willing to join our corner of the Porsche world. The Factory AOS design is well known for failing of the flow control diaphragm, and the result is increased oil consumption, or excess smoking, and in severe cases engine hydrolock causing bent rods and cylinder damage. UAOS for Porsche 911 996 models comes complete with a Billet Black Anodized Aluminum Accumulator, Stainless Steel Microprocessor Controlled Infra-red Sensor, OEM components, custom hoses, aluminum change-over relocation bracket, a plug and play wire harness/relay, mounting hardware, and connectors. Engine started to run better, with less oil in AOS to intake hose. Oil separator. Sep 10, 2017 · The coolant lines going to the AOS are under constant pressure from the coolant system from the connection on the water pump, so they have to either be internally blocked or connected together to make a loop bypass. Maybe it can shed some light on your quest. Overview of the Porsche 997. 00 By continuing with your purchase and completing the checkout process you acknowledge and agree with Sales Terms and Conditions. We recommend replacing the AOS vent hoses (lines) at the same time as you change the AOS as they are typically brittle and will crack, causing vacuum leaks that can cause engines to run poorly, eventually leading to engine damage. 6L / 997 3. It seems you can easily run up a four-figure bill to replace a £50 or so Sep 17, 2023 · Porsche is a brand synonymous with precision engineering and high-performance luxury vehicles. The UAOS complete kit for the Porsche 996/997. Varies depending on model. Jan 13, 2021 · I've had issues with oil ingestion issues on a track boxster with a 996 3. 026. Fits Porsche 911 (996) models from 1999-2001. 51). Vehicle was driven 250 miles to attempt to burn off oil that was in the systems. My car is 2003 C4S and I have correct AOS but the dealer could not find accordeon pipe that connects to the bottom of AOS (number 10 on Pet picture). Over time, the AOS may fail, potentially causing performance issues and even severe engine damage . We are generally running stickier tires, So, thiese tires create more G loading in the curves, which points to an oil starvation issue of rod bearing #6. 996 AOS Bellows Boxster OAS Oil Leak Porsche SPark Plug Tube Seals. Before I get into the nitty gritty of the actual AOS replacement, let me give you some background on my car. 964 993; VW Type 4; Custom Cylinders; Mahle Motorsport Porsche Pistons & Nickies Cylinders; Mahle Motorsports C+P Sets. Porsche 99610702355 Oil air separator for Porsche 996 3. 6 engine PCV system, applying vacuum to the crankcase and separating oil/air drawn into the AOS. Follow up video after replacing my AOS on my 2003 996 C4S Nov 12, 2012 · I've read a lot about big labour bills to replace the air oil separator (AOS) unit on the 996. Porsche part £73 + VAT, probably cheaper non-branded. The Porsche 987 Ultimate AOS UAOS-AL Complete Kit. How to tell if the AOS (Air oil separator) has failed on a Porsche 911 - 996. 107. The UAOS-E 99YM fits coupes and cabs Sep 5, 2024 · Porsche 996 911 engines feature an air oil separator, also commonly referred to as the AOS. Fits: Porsche 996 3. The later AOS mounts differently than the early engines and it was a piece of cake. When the separator fails, you will begin to see a large increase in the overall vacuum in the engine Mar 27, 2011 · I bought AOS from the porsche dealer (so it is VIN matached, correct year etc 996. I bought this car about a year ago from California with about 127,000 miles on it and it now has 133,000 miles on it. Porsche 356; Porsche 911. 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. Apr 22, 2023 · On *****, 996 there is a thread "oil pressure instability" about the use of a genuine Porsche AOS, which really works well in a recent monitored track event that describes the unexpected positive use of the original Porsche AOS in high g force corning (1. If this is failing, you can experience numerous symptoms, and although they can show up at any time, most begin to show around 60,000-80,000 miles. a pre-sealed/modified "lifetime AOS" is included with each kit. Includes Motorsport AOS, additional hoses (2) and hardware for 987. Porsche models such as the Boxster, Cayman, and 911 (996 and 997) up to 2008 frequently experience AOS failures. '01, 996 tip, C2. Labour is your potential issue the AOS being situated on top of the engine at the front nearside. 996/997 GT3 Genuine Porsche Air Oil Separator (AOS). Mike Focke's Apr 4, 2022 · This video shows you how to test the AOS (Air Oil Separator) in your Porsche 986/987 and other models to see if it needs replacing. 5. 2: 1983-1989 Porsche Carrera SC: 1977-1983 Porsche 930 Turbo: 1975-1989 Porsche Early 911: 1964-1977 The Porsche 996/997 Ultimate AOS UAOS-AL Complete Kit. 1999 Porsche 996 Cabriolet C4 Manual Transmission. You don't have to just as May 11, 2025 · 996 Forum - Aos only last 20k? - I replaced my aos 20k miles ago with a Porsche part from fcp euro. asking people to pay $10 to the 'porsche gods' (his paypal address) for the instructions to block the vent. Note: photo is of a 996 Motorsport AOS. 6L Porsche 997 3. 4 engine swap and an LN +2qt deep sump. The AOS should be treated as a maintenance item and replaced using only Genuine Porsche parts, including all AOS vent hoses and lines, every 6 years or 75,000 miles, whichever comes first. Porsche 911 Air Oil Separator Replacement - 996 (1998-2005) - 997 (2005-2012) - Pelican Parts Technical Article Jun 15, 2010 · All Activity; Home ; 911 ; 996 Series (Carrera, GT3-1, TT, GT2) (MY1998 - 2005) 996 Series (Carrera, Carrera 4, Carrera 4S, Targa) How Much To Replace Aos? Feb 29, 2024 · The AOS, or air oil separator, is a part of the PCV system on a modern Porsche sports car engine found in Boxster, Cayman, and 911 models. 2 Comments Sep 15, 2019 · 2000 Boxster Tiptronic 2003 Boxster 2003 996 C2 Cab 2002 996 (SOLD) 1986 944 (gone but missed) The Porsche 996/997 Ultimate AOS UAOS-AL Complete Kit $740. Design 911 supply car parts, spares and accessories, to both retail and to the trade. Looking at the hose routing the long hose that goes to cylinder banks 4-6 appears to be the main concern as its longer on the standard car than on the modified AOS. A new design? Not sure but my parts catalog shows 4 versions of this hose and 8 versions of the AOS with my part numbers being the "newest" for both parts. Its primary function is to prevent oil mist from contaminating the intake system while allowing clean air to circulate back into the engine . 8 g) and oil levels. Previous Post: A little wrenching weekend. One such issue, particularly found in Porsche’s boxer engines, is the failure of the Air-Oil Separator (AOS). Apr 24, 2019 · 996 Series (Carrera, GT3-1, TT, GT2) (MY1998 - 2005) 996 Series (Carrera, Carrera 4, Carrera 4S, Targa) Only get an original Porsche AOS. There is a lot of vacuum on the oil fill tube when the car is running and I take the oil. 01) nor my breather hose (996. Dec 31, 2022 · The Porsche 987 Motorsports AOS is recommended by many others for the past 5-6 years due to a couple of items. 4 Carrera base model Followup from the Pelican After replacing my ver. I'm getting Smokey exhaust again. 2, particularly on Tiptronic equipped cars where the engine is often dropped to gain access to the upper left side of the engine. I think I'm going to have to replace the AOS. When the flow The Porsche 996/997 Ultimate AOS UAOS-AL Complete Kit. However, like any other vehicle, Porsches are not without their share of mechanical vulnerabilities. Apr 17, 2025 · 996, 997, 991: Air Oil Separator (AOS) Olieverbruik, rook uit uitlaat: 996, vroege 997: Wat zijn de belangrijkste onderhoudstips voor de Porsche 911? May 15, 2017 · 996 Forum - Air Oil Separator AOS Question - Hello all. 58) had an o-ring for the connection between these two parts. My Car is a 2003 Gen 2 C4S. 00. Our car product and accessory range includes brakes, exhausts, tyres, wheels and panels and interiors. In fact when oerdered what is marked as number 10 comes as a small beded pipe 1/2 in. One of the most common failures in the Boxster or 996 is the Air/Oil Separator, also referred to as the AOS. 1 applications. 4" steadt from idel upwards, so looks like the AOS device is working ok, at least by these standards. Feb 21, 2024 · The Porsche air-oil separator (AOS) is a critical component designed to separate the oil and air in the crankcase, ensuring that only air is drawn into the intake manifold. For the 2006-2008 Carreras, Porsche redesigned the system and moved the AOS to the top of the engine under the right side intake. Porsche 996 3. Does not look right. 01 I was disappointed to find that the new AOS was still reading between 6. The UAOS-AL 99YM fits coupes and cabs with cable throttle (C2's). Porsche Engine Oil/Air Separators 101 The Engine oil air separator directly affects the engine crankcase atmosphere because basically all Porsches from 1980 on including the current 986-987-996-997-Caymen & Cayenne engines all are positive crankcase type systems meaning the engine crankcase has Jul 15, 2008 · The 996 and 987 use the same part numbers for the AOS and hoses , the difference is purely the prefix being 987 rather than 996. If this is failing, you can experience numerous symptoms, and al UAOS for Porsche 996 models comes complete with accumulator, flow controller, all hoses, microprocessor controlled infrared sensor, Plug-N-Play wiring, mounting hardware, fully assembled and pre-wired. Eliminates dumping of oil into intake manifold. 1 air oil separator / AOS VW Type 4 / Porsche 914/912e. 1. folks lining up with chequebooks in hand and a glass for the Dec 12, 2024 · The hoses can run to the reservoir, the radiator hose and the AOS. Next Post: Power Probe 3. I contemplated AOS deletion over the motorsports version given there are many posts noting the s Apr 30, 2013 · Sorry for the rant but just had to get it off my chest. JavaScript seems to be disabled in your browser. A key indicator is excessive white or blue s Jun 5, 2018 · Just had it done on my 996. The 996 Ultimate AOS UAOS-E (Elite bxtech, here is an article I have wrote for the PCA. 6L 99610702650 99610702651 99610702652. My local dealership just quoted me 20 hours labor to change my AOS. Oil / air Separator. UAOS for Porsche 911 996 models comes complete with a billet black anodized aluminum accumulator, stainless steel microprocessor controlled infrared sensor, OEM components, custom hoses, aluminum switch relocation bracket, a plug and play wiring harness/relay, mounting hardware, and connectors. This is Project 9 from the 101 Projects for your Porsche Boxster book. Machine-In Cylinder and Piston Sets; Slip-Fit Cylinder and Piston Kits; Porsche 356 & 912; Porsche 911 1965-77; Porsche 911 1978-98; Base Shims. Add to Cart + Add to Compare; SKU: UAOS-AL-987. 6L Oil Separator. If that is failing, you’ll revel in a lot of signs, and even Feb 16, 2018 · In regards to the o-rings you and Gelbster mentioned: neither my AOS (996. The car now has 103K miles on it. 2001 Porsche 996 3. Add to Cart. Ordered new Genuine Porsche AOS, related o-rings, and revised top vent hose from Pelican. UAOS for Porsche 911 996/997 models comes complete with Accumulator, Flow Regulator, all hoses, Microprocessor Controlled Infra-red Sensor , Plug-N-Play wiring, mounting hardware, fully assembled and pre-wired. established. Jan 25, 2020 · guy on rennline 996 forum calls himself 'porschetech' has developed a mod where you deactivate the aos by blocking the reference air vent such that the diaphragm doesn't move. My indy wished he'd lowered the engine and with 107K miles and 16 years of use the retaining bolts were fairly well er. The AOS, or air oil separator, is a part of the PCV system on a modern Porsche sports car engine found in Boxster, Cayman, and 911 models. Mar 27, 2011 · AOS DIY. More from the Blog. Each kit comes with a pre-sealed/modified "lifetime AOS". Total estimate, $3300. $740. Ultimate aos was on backorder and I needed the car. The AOS is a critical part of the Porsche 996 or 997 3. Maybe this one 996-107-023-55-M100 Oil Separator, 996 Carrera 2/4 (1999-01), Each Brand: Genuine Porsche [More Info] some DIYs AOS 2002 Porsche 996 - Rennlist Discussion Forums replace from top So I replaced my Air/Oil separator - Rennlist Discussion Forums _____ One of the main disadvantages of a wet sump is the large surface area and the vapor pressure at elevated temperature leading to significant evaporation, and Genuine Porsche Air Oil Separator (AOS). The coolant lines to the AOS help heat up the AOS during low temp running/first start up to assist with air/oil separation. Each kit also includes a pre-sealed/modified "lifetime AOS". Parts were replaced last weekend. The AOS was replaced with the real Porsche part but the white smoke problem continues. Just ran the test in the previous posting on my 996. It is a 2002 C4 Cab. Adding a Genuine Porsche Motorsports AOS to your Boxster or 911 helps to reduce oil ingestion and smoking when tracking your car with an M96 engine. 4L. 1 models includes the following: (1) black anodized aluminum Accumulator, (2) infra-red sensor, (3) plug-n-play harness, (4) aluminum relocation bracket for change-over valve, (4) custom hoses, (5) flow regulator, (6) mounting hardware, and (7) a pre-sealed AOS with a lifetime warranty, (8) as well Porsche 996 911 engines feature an air oil separator, also commonly referred to as the AOS. 00 AOS with a new Porsche Genuine AOS ver. The engine air-oil separator is an emissions device that is responsible for collecting residual gases and vapors contained inside the crankcase and funneling Jan 31, 2015 · I did the AOS on my '03 S (three chain engine) this past weekend. Patent Pending The Ultimate AOS design works by taking a systematic approach to the problems associated to to the Factory AOS and correcting/improving them. 21 and 7. Well I finally did it another right of passage as a Porsche Boxster owner. Jan 5, 2025 · On the 1998-2005 Carreras, the engine air-oil separator is located at the top left rear corner of the engine. sticks090460 1,116 posts Upgraded Porsche Motorsport air oil separator for heavy track use. 147. 356 Cylinder and Piston May 30, 2012 · All Activity; Home ; 911 ; 996 Series (Carrera, GT3-1, TT, GT2) (MY1998 - 2005) 996 Series (Carrera, Carrera 4, Carrera 4S, Targa) Torque specs for IMS, AOS and clutch replacement Jun 29, 2021 · Porsche 996 911 engines characteristic an air oil separator, additionally often known as the AOS. jrltys gfaqb zmvvvip daet yfyxyqk denrkuow fmxfches qop fapgoes jsu
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