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Surprisingly only broke the oil fill tube. Replacement of that required removal of the alternator which while difficult made installation of the AOS and intake less arduous. Even with a lot of accidental pushing and bending the small water tube didn't break nor did the many small hard vacuum lines and rubber mounts.
I had my own AOS thread going and 996.2 pointed me to this one. Not doing UAOS. 2003 C2, so it's the AOS that goes in the engine top and not the side. Seems to me this one is going to more difficult because raises up on removal. Anyone with experience on both types? Does Pelican Parts guide work well on this one?
Yes, it's just like all the 996.2 (2002+) C2s.
It's not that difficult, except for the left AOS bolt and of course the last "bitch bolt."
But there are a bunch of tips in this thread for getting the bitch bolt out.
Congratulation to Skip, his UAOS is on the verge of taking off even bigger with Barry Hart Hartech is also going to offer this product on Jake recommendation in Europe. Congrats. again on success.
Thanks JohnCA58, I have sold the UAOS units to Australia, Beijing, Canada, South Africa, Netherlands, and now with Hartech in Europe and FSI offering to their customers, the next issue for me will be supply...the 996 Market and customers are so fickle it makes it difficult to predict or get ahead of demand, and I'm not a rich man, on the contrary, just a retired Porsche Tech who has wrenched out a living.
To pcolapacker and 996.2 you shouldn't have installed the factory style AOS for ANY reason. The UAOS is superior in all ways , shapes, and forms, even in cost. You never have to replace it again, it protects against Hydrolock/engine failure by means of secondary oil separator and warning system, and is less expensive ( over time).
If you take a 4 hour labor estimate for an AOS replacement, and a 3 year interval as recommended by all businesses who know the frequency of failure of the AOS, the UAOS will have saved 12 hours labor alone ( @ $1800usd ) in a 9 year period......8 hours labor ( @$1200) in a 6 year period..... 4 hours labor ( @$600) in a 3 year period.
It's really a NO-BRAINER , y'all need to explain your decision...
1. Before I change a factory system I need to well understand that system and the all the ramifications of proposed changes. I had asked for diagrams and explanations of the factory AOS system and the changes the UAOS makes and did not get them. I have a lot of reference material so eventually I will get this information if it's not provided.
2. There is no timetable but in perhaps two years we will be dropping the engine and we could install the UAOS at that time.
It seems like one would remove enough from the top of the motor that doing injectors at the same time would make sense and give you some more space to work in. Thinking of tackling it that way...
1. Before I change a factory system I need to well understand that system and the all the ramifications of proposed changes. I had asked for diagrams and explanations of the factory AOS system and the changes the UAOS makes and did not get them. I have a lot of reference material so eventually I will get this information if it's not provided.
In the last year I have poured my heart out about all things AOS related in thousands of posts in only two threads, explaining the physics ,dynamics, design, differences, downfalls, advantages, every aspect of the Factory design, the Motorsport design, the UAOS design. ,this one has had 15k views and other 50k, that's 65k views of my posts in only two threads, so I'm pretty sure you are aware. DeJeeper just gave you a simplified overview, and the UAOS website has also a simplified overview. For a detailed understanding I suggest you read the thousands of my posts, I'm not a journalist and will not be trying to write a essay on the subject.
Last edited by Porschetech3; 02-24-2021 at 05:52 PM.
1. Before I change a factory system I need to well understand that system and the all the ramifications of proposed changes. I had asked for diagrams and explanations of the factory AOS system and the changes the UAOS makes and did not get them. I have a lot of reference material so eventually I will get this information if it's not provided.
2. There is no timetable but in perhaps two years we will be dropping the engine and we could install the UAOS at that time.
skip has explained the factory componants and what each items in his modification does in depth, in this and other uaos threads. I gave i an explaination of the factory system a few posts above. Post 233
this mod does not change how the factory system works, it just adds a resivior, sensor and moves the diaphram to an easy to replace location. The new diaphram is a bmw part and much cheaper then the entire porsche aos. As i said before the diaphram is what fails 90% of the time.
Choose to install or not... it really doesnt make a difference to me but if u do your research u will see this as a wise mod.
Starting to do the planning work of this job. Are there any things I should be changing while in there? Any other lines, hoses, fittings, connectors, etc. Have you guys broken anything during this job?
If you haven't replaced this factory plastic AOS coolant line connector with the upgraded URO Aluminum one like here, I would suggest that. I was contemplating including it in the UAOS kit, but figure many people already have this upgrade after 20 years.
Surprisingly only broke the oil fill tube. Replacement of that required removal of the alternator which while difficult made installation of the AOS and intake less arduous. Even with a lot of accidental pushing and bending the small water tube didn't break nor did the many small hard vacuum lines and rubber mounts.
Originally Posted by Porschetech3
If you haven't replaced this factory plastic AOS coolant line connector with the upgraded URO Aluminum one like here, I would suggest that. I was contemplating including it in the UAOS kit, but figure many people already have this upgrade after 20 years. https://www.amazon.com/URO-Parts-996.../dp/B079B77JPF
URO Aluminum replacement for factory plastic AOS coolant connector
A few years ago I broke the oil filler neck, and during replacement broke the AOS coolant connector.
02-24-2021, 01:29 PM
