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Old 11-13-2013, 09:26 PM   #57
TSI_mr.niceguy
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Interesting. So Bender, if the blow by that gets vented back into the intake manifold is the cause of the carbon buildup, why doesn't a catch can solve the problem if it's job is to catch the blow by so it doesn't have to be rerouted into the intake manifold? Or why not just route the blow by into the exhaust and have it go through the cats?
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Old 11-13-2013, 09:34 PM   #58
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So is 60K the recommended milestone or just your preference? I'm at 42K now.
I will be doing it again in 60. I think anywhere from 50-60 makes sense.

And agreed with Steve's comment. North Penn was nothing but fair and obviously Ken is great to deal with.
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Old 11-13-2013, 09:46 PM   #59
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Interesting. So Bender, if the blow by that gets vented back into the intake manifold is the cause of the carbon buildup, why doesn't a catch can solve the problem if it's job is to catch the blow by so it doesn't have to be rerouted into the intake manifold?
Honestly, I don't know the answer to this question. They don't work but I don't know why. I would theorize that it is because it is vaporized and there is little place for it to condense as the surfaces that it would condense on get water condensation on it first. Which would prevent or discourage carbon condensation. That is just a theory though.

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Or why not just route the blow by into the exhaust and have it go through the cats?
Not sure about the amount of vacuum that would be created by the exhaust. I could think of some negative side effects that I wouldn't want a daily driver (smell and occasional smoke) but it is likely doable. Frankly, I think the issue is controllable enough via other means that I wouldn't want to go down that road.
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Old 11-13-2013, 09:51 PM   #60
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I will be doing it again in 60. I think anywhere from 50-60 makes sense.

And agreed with Steve's comment. North Penn was nothing but fair and obviously Ken is great to deal with.
Oh Mr. Buildup expert...take from that what you will...

I will ask so that it is recorded in this here sticky; are there differences with the TDI vs other engines?
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Old 11-13-2013, 09:54 PM   #61
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I will ask so that it is recorded in this here sticky; are there differences with the TDI vs other engines?
I can't answer that question effectively.
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Old 11-13-2013, 10:20 PM   #62
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I can't answer that question effectively.
Access your databanks, damnit!
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Old 11-13-2013, 10:29 PM   #63
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Access your databanks, damnit!
That sector of his hard drive was corrupted.
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Old 11-13-2013, 10:55 PM   #64
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That sector of his hard drive was corrupted.
Corroded by Eagle Rare.
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Old 11-14-2013, 12:24 AM   #65
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catch cans help and definitely do slow it down but won't eliminate the issue. Vent to atmosphere is best i believe. But the mesh design has to be useful without restricting airflow, so i'm sure some of the thinner/higher temp blowby can still flow through. I always thought the biggest benefit was to get rid of the PCV that has been known to fail on 2.0T engines. Zhijj is dealing with that issue right now isn't he?
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Old 11-14-2013, 01:35 AM   #66
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My Pcv failed about a month ago. I thought even some of the catch can makers said they proved the cans don't really do anything to help the di carbon buildup though.
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Old 11-14-2013, 08:16 AM   #67
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catch cans help and definitely do slow it down but won't eliminate the issue. Vent to atmosphere is best i believe. But the mesh design has to be useful without restricting airflow, so i'm sure some of the thinner/higher temp blowby can still flow through. I always thought the biggest benefit was to get rid of the PCV that has been known to fail on 2.0T engines. Zhijj is dealing with that issue right now isn't he?
Not really correct

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My Pcv failed about a month ago. I thought even some of the catch can makers said they proved the cans don't really do anything to help the di carbon buildup though.
Correct.

A VTA Catch Can will have an impact. A traditional catch can has been shown (multiple times) to do exactly jack squat.
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Old 11-14-2013, 08:19 AM   #68
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That sector of his hard drive was corrupted.
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Corroded by Eagle Rare.
ERROR! ERROR! WHISKEY LEVELS LOW.
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Old 11-14-2013, 09:26 AM   #69
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ERROR! ERROR! WHISKEY LEVELS LOW.
I would hope so, at 7:19 am.

I'm a bit hungs though.

Since this is a sticky, I will contribute something. Bender and I did get as far as "uh...I dunno?" last night in deciding whether carbon buildup is an issue with the TDI. We did ascertain that the TDI has a ccv and an egr, not a pcv. Take that for what it's worth.
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Old 11-14-2013, 09:29 AM   #70
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Correct.

A VTA Catch Can will have an impact. A traditional catch can has been shown (multiple times) to do exactly jack squat.
like i said i think vent to atmosphere is best, but i still think the traditional one should do something. what would the oily residue that they pour out do if it wasn't caught in the catch can?
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