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You mean the SCREEN, right? Yes, that was discussed and is still under contention.
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I figure that 1) the oil passing through the screen comes directly from the oil filter, and 2) No other car except Subaru employs this strategy (and they make theirs easily accessible).
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If I can get the recall service tech to remove it completely, that's what I'll do. I may even bribe him
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Yes, I meant the screen. I have read of some who used a bypass mechanism but I forget who makes it- so they can inspect and change that screen at will. What I am wondering is if removing the screen is in any real way detrimental. I mean it is there by design, but it could be a faulty one, though looking at the numbers of incidents reported versus the numbers of potentially affected cars on the road, it is a smaller percentage than you'd expect- but that's only because those affected have all pretty much congregated in a few places and it looks huge from the outside looking in.
Sorry I was probably not clear. 2014 A8. At around 77K miles at failure. Last summer I was on a long highway trip and the turbos failed. I had to get it towed to the nearest Audi dealer (in NC). Took a few weeks, but they did full repair, including putting in the re-designed strainer. $11k repair bill. My question is whether that new oil strainer fixes the problem. The new oil strainer has about 10k miles. I am now doing oil changes every 5k miles.
the new strainer should prevent any issues. you changing oil at 5K is the best thing you can do. I do 5K OCIs on all the cars in the household and have never had issues with anything oil related (or oil consumption either).
What I am wondering is if removing the screen is in any real way detrimental. I mean it is there by design, but it could be a faulty one, though looking at the numbers of incidents reported versus the numbers of potentially affected cars on the road, it is a smaller percentage than you'd expect- but that's only because those affected have all pretty much congregated in a few places and it looks huge from the outside looking in.
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The screen is absolutely detrimental... when it clogs. The design flaw is that they put a 0.0015 inch filter screen in after a primary filter which lets enough particles through to clog the (inaccessible) filter screen over time. IMHO, that is absolutely stupid. Look for the numbers of turbo failures of similar cars with similar mileage, and I'll bet Audi comes in last.
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</opinion> Remove it! </opinion off>
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Have we seen any reports of a post-March 2017 D4 or any D5 4.0 with a turbo failure due to screen-related oil starvation? Even one?
I tend to agree that full removal on the surface *seems* to be the right idea, but then again I have no idea why Audi felt it necessary in the first place. They clearly had their reasons, and I'm not sure I want to put a bunch of us armchair engineers up against them. If the larger revision screen post 3/17 fixed it, I'm ok with that.
Short of bribery, there's no way you're going to get the screen removed on this recall repair. No way. That warranty on the turbos gives me another 5 years and 95k miles regardless. I'm good with this. The trick is getting it scheduled. Audi is going to have to move a ton of parts to be ready for it. You know they are going to have to replace turbos all over when they start checking. Better to replace on inspection now when it's torn down to replace the screen than have someone coming back with a warranty claim a year or two later. Audi dealers are going to hate what this will do to their loaner fleet.
Have we seen any reports of a post-March 2017 D4 or any D5 4.0 with a turbo failure due to screen-related oil starvation? Even one? I tend to agree that full removal on the surface *seems* to be the right idea, but then again I have no idea why Audi felt it necessary in the first place. They clearly had their reasons, and I'm not sure I want to put a bunch of us armchair engineers up against them. If the larger revision screen post 3/17 fixed it, I'm ok with that. Short of bribery, there's no way you're going to get the screen removed on this recall repair. No way. That warranty on the turbos gives me another 5 years and 95k miles regardless. I'm good with this. The trick is getting it scheduled. Audi is going to have to move a ton of parts to be ready for it. You know they are going to have to replace turbos all over when they start checking. Better to replace on inspection now when it's torn down to replace the screen than have someone coming back with a warranty claim a year or two later. Audi dealers are going to hate what this will do to their loaner fleet.
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Audi most likely was preparing for the contingency of a blocked primary filter.
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It's still up for grabs how they will deal with "worn" turbos! Let's hope their pockets are deep and flush with money. I have a feeling they will take a chance on the few callbacks, rather than generously lay out a ton of cash handing out turbos. ...which follows their past business model.
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I plan on bribing them However, if they do indeed renew a 5/95 on the turbos, I'd likely go with the new screen!
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I absolutely would not remove the screen. Removing the screen would void the extended warranty on the turbos. There have been no reports of turbo failures with the revised coarse-mesh screen. Audi is spending millions of dollars to do this campaign. There's no way they would do that if they didn't believe the revised screen fixes the problem and also prevents others.
Don't over-think this. Leave the engineering to Audi and not highly speculative forum posts. There is absolutely nothing indicating that removing the screen improves turbo reliability. Audi might have gotten it wrong the first time, but the millions of dollars they are spending on the campaign indicates that they have now put enough engineering resources on the problem to understand and resolved it.
isn't the oil filter in the car a bypass style where if it is completely clogged it will just stop filtering? like most other designs? I agree removing the filter would make for an interesting dealer visit if you go in for the work under warranty and don't have them... I see no issue with the larger hole revised screens.
I absolutely would not remove the screen. Removing the screen would void the extended warranty on the turbos. There have been no reports of turbo failures with the revised coarse-mesh screen. Audi is spending millions of dollars to do this campaign. There's no way they would do that if they didn't believe the revised screen fixes the problem and also prevents others.
Don't over-think this. Leave the engineering to Audi and not highly speculative forum posts. There is absolutely nothing indicating that removing the screen improves turbo reliability. Audi might have gotten it wrong the first time, but the millions of dollars they are spending on the campaign indicates that they have now put enough engineering resources on the problem to understand and resolved it.
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Most of my "remove it" sentiment was expressed pre-screen-recall, and as I said above, "if they do indeed renew a 5/95 on the turbos, I'd likely go with the new screen!". However, as I may eventually install larger/non-OEM turbos which generally require screen removal, there's still reason why I might want to pull it so that I don't need to do it later. So, this is still a choice for me. YMMV
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As far as "Leave the engineering to Audi", they obviously flopped on this marvel of engineering, and it may be only because of "highly speculative forum posts" that this recall was issued.
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Sorry to jump into this thread but I have a blown turbo on my 2015 Bentley Continental GT which I believe has the same V8 4.0 TT.
I'm based in the middle East where independent specialist mechanics ar few and far between and the only main dealer would want double the value of the car to do the repair.
The plan is to replace both turbos, the oil feed line, the oil screen, the check valve, and also the oil separator and intercooler.
How common is engine failure after blowing a turbo on these engines? A Google search on the subject doesn't make pleasant reading. The fins on my intake side were not broken but the edges are rough and chipped so I'm guessing there will be fragments in the system somewhere.
03-30-2022, 09:04 AM
