vwxyzero
Veteran Member
- Joined
- Jul 12, 2004
- Location
- Los Angeles, CA
- TDI
- '96 Passat Sedan, '96 TDI Passat Wagon, & Jetta Sedan, '83 Turbodiesel (IDI)
I've just read this entire thread. I know some members will wonder why I'm interested in this topic since I still drive B4's. So let's get that out of the way first: My wife is looking at the new Audi A3 TDI, and two friends of mine who are not on this form own 2010 TDI's; one is an Audi A3 and the other is a Jetta SW. Both of my friends currently live close to a station in Marina Del Ray, CA that sells B5 and they both consistently drive on B5 whenever possible and neither one of them has had any problems. Yet. I can get back to you with milage stats if you like, but I can't do it now, both friends just happen to be out of town for the weekend.
First: Does the Audi A3 have the exact same IP that is in question in this thread? (I would assume that they do, but assumptions can be dangerous.)
If my wife actually buys the A3 TDI with in the next year she will also have 24 hour access to B5 though either the station mentioned above or from the Co-op I belong to that distributes commercially made ASTM spec. B99 to it's members. So I'm not particularly concerned about her running into lubrication problems in the IP.
Also after reading this thread, I think I would insist on an after-market in-line water separator should my wife actually make the TDI commitment. So, there is also a question here, and maybe someone can answer it: Is anyone currently using an after-market in-line water separator? Would VW or Audi approve of this addition or would it void the warranty? Is anyone else considering this, or has anyone already installed one on the new CR's?
I am also concerned about the design of the IP. From a design perspective, I agree, it looks flawed. The flaw as I see it, is in the design of the roller as mentioned before. However I have a slightly different take on the issue: There is nothing inherently wrong with the idea of a roller on a cam. The problem is that without any way to stabilize the the IP's piston from rotating, a single roller, no mater the diameter is going to wobble. Not even a spring from hell will ever keep that piston on a straight path through it's cylinder. I know I'm going to hear s**t about this because I don't work on them; but, contrary to the opinion of Oilhammer (who I do respect); if any modifications could be made to to the IP's piston it would be much better to add an additional roller in parallel. The Big question here; is it possible to redesign just the roller piston? Where am I coming from on this since I have no experience with rebuilding IP's? Racing roller cams. Yeah, I know we are talking Apples and Oranges here, but based on ancient experience building racing engines, I do understand the issue.
First: Does the Audi A3 have the exact same IP that is in question in this thread? (I would assume that they do, but assumptions can be dangerous.)
If my wife actually buys the A3 TDI with in the next year she will also have 24 hour access to B5 though either the station mentioned above or from the Co-op I belong to that distributes commercially made ASTM spec. B99 to it's members. So I'm not particularly concerned about her running into lubrication problems in the IP.
Also after reading this thread, I think I would insist on an after-market in-line water separator should my wife actually make the TDI commitment. So, there is also a question here, and maybe someone can answer it: Is anyone currently using an after-market in-line water separator? Would VW or Audi approve of this addition or would it void the warranty? Is anyone else considering this, or has anyone already installed one on the new CR's?
I am also concerned about the design of the IP. From a design perspective, I agree, it looks flawed. The flaw as I see it, is in the design of the roller as mentioned before. However I have a slightly different take on the issue: There is nothing inherently wrong with the idea of a roller on a cam. The problem is that without any way to stabilize the the IP's piston from rotating, a single roller, no mater the diameter is going to wobble. Not even a spring from hell will ever keep that piston on a straight path through it's cylinder. I know I'm going to hear s**t about this because I don't work on them; but, contrary to the opinion of Oilhammer (who I do respect); if any modifications could be made to to the IP's piston it would be much better to add an additional roller in parallel. The Big question here; is it possible to redesign just the roller piston? Where am I coming from on this since I have no experience with rebuilding IP's? Racing roller cams. Yeah, I know we are talking Apples and Oranges here, but based on ancient experience building racing engines, I do understand the issue.
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