Do yourself a favor and get a catch-can...

[McFuzz]

... or you'll get this glorious goo caked and burned onto your intake valves...

[blbroo]

To make your own setup, vs $400+ for a kit, anyone can just start with this part. Then from there, you just need hoses and a can. I bought the $54 10AN hoses from USP too and a mishimoto catch can, but there are baffled options available, with hoses, for $80 and less. Would just need adapters to turn the 10AN fittings on the spulen part below to nipples. Something like this:



http://www.uspmotorsports.com/Engine...hIohoCqxjw_wcB

[McFuzz]

To make your own setup, vs $400+ for a kit, anyone can just start with this part. Then from there, you just need hoses and a can. I bought the $54 10AN hoses from USP too and a mishimoto catch can, but there are baffled options available, with hoses, for $80 and less. Would just need adapters to turn the 10AN fittings on the spulen part below to nipples. Something like this:



http://www.uspmotorsports.com/Engine...hIohoCqxjw_wcB

True true. I got lucky and found my CTS kit at a very reasonable price from a fellow member so that worked out for me. But nevertheless - anything is better than nothing!

[adamazing]

True true. I got lucky and found my CTS kit at a very reasonable price from a fellow member so that worked out for me.

You're welcome

[zcspec]

Even on the newer 2015 B8.5?

[The Infiltrator]

I have one am I'm glad I got one after seeing the crap that goes back into my intake manifold. Now i just need to take the manifold off and clean the inside to get that smoothness back.

[adamazing]

Even on the newer 2015 B8.5?

Absolutely. I fill my catch can full every other week. Most of it is condensate, but the bottom of it is milky, oily sludge.

[STA4]

I have a catch can and I'm not convinced that it's preventing carbon build-up. In the summer time, I collect nothing. In the winter I catch mostly water. Valve overlap is also a cause of build-up...and you can't do anything about that.

[adamazing]

I have a catch can and I'm not convinced that it's preventing carbon build-up. In the summer time, I collect nothing. In the winter I catch mostly water. Valve overlap is also a cause of build-up...and you can't do anything about that.

I think it's a general consensus that catch can's don't prevent buildup from happening. But it's a buffer to slow the accumulation dramatically.

[The Infiltrator]

I think it's a general consensus that catch can's don't prevent buildup from happening. But it's a buffer to slow the accumulation dramatically.

This

[blbroo]

This

That. Water / Meth injection can decrease build up by steam cleaning the valves regularly, and even more so combined with regular Italian tune-ups.

The catch can keeps the blow-by oil from entering the combustion chamber, which would lower octane. Also will help keep your intercooler more efficient.

[The Infiltrator]

That. Water / Meth injection can decrease build up by steam cleaning the valves regularly, and even more so combined with regular Italian tune-ups.

The catch can keeps the blow-by oil from entering the combustion chamber, which would lower octane. Also will help keep your intercooler more efficient.

This Water / Meth you talk to me about, it might be on my next mod list!

[adamazing]

and even more so combined with regular Italian tune-ups.

My favorite method.

Also will help keep your intercooler more efficient.

Yes, a thousand times yes. I saw nearly a 100% reduction in oil blow-by ending up in my charge pipes after I installed a can.

[zcspec]

My allroad just turned 10K so I guess now is a good time since the motor's still "fresh" and I'm close to installing the TR8.

[McFuzz]

I think it's a general consensus that catch can's don't prevent buildup from happening. But it's a buffer to slow the accumulation dramatically.

This x1000.


The best solution for carbon build-up is dual injection - port and direct. Unfortunately we get the short end of the stick with our VAG offerings...

[blbroo]

This Water / Meth you talk to me about, it might be on my next mod list!

It's cool to watch the IAT's drop 10+ degrees when the spray hits. More octane, cooler IAT and cleaner engine.

[STA4]

Yes, a thousand times yes. I saw nearly a 100% reduction in oil blow-by ending up in my charge pipes after I installed a can.

Sometimes I forget to drain the OCC and I assume that nice frothy crap that floats on the top gets sucked into the IC.

[shaunm82]

It's cool to watch the IAT's drop 10+ degrees when the spray hits. More octane, cooler IAT and cleaner engine.

I agree with this. Rain has been here for the past week, and will be here for at least another, so I can't play around with it as much as I want to lol.

[blbroo]

I agree with this. Rain has been here for the past week, and will be here for at least another, so I can't play around with it as much as I want to lol.

My fellow scientist in trading meth techniques. ^

Rule is though, that you have to have an M-class in the garage to run W/M on your A4. ;-)

[Audibot]

Absolutely. I fill my catch can full every other week. Most of it is condensate, but the bottom of it is milky, oily sludge.

That's insane. I find I'll fill it up once every 4 weeks in winter, and basically never during the summer. Like you, mostly condensate, but still not stuff I want going into the engine. Worse part is that in winter, it can be difficult to get it thaw out enough to dump. I need to do more romps.

[adamazing]

That's insane. I find I'll fill it up once every 4 weeks in winter, and basically never during the summer. Like you, mostly condensate, but still not stuff I want going into the engine. Worse part is that in winter, it can be difficult to get it thaw out enough to dump. I need to do more romps.

It's only become that often since winter/cooler months hit. During the warmer months I would dump it every 3-4 weeks and it would only be half full or less.

[o1turbo30v]

Catch cans do absolutely nothing for these cars if the cars are daily drivers.

[treginginco]

In the middle of 2012..... wasn't a 5th injector added to the engine to deal with the carbon buildup on the valves? At Camp allroad this summer, the injector was shown to me and an impressive explanation of how it works was given.

[B44]

Catch cans do absolutely nothing for these cars if the cars are daily drivers.

+1 if the car is driven hard each time driven with no short trips and proper warm up catch is not needed.

[adamazing]

In the middle of 2012..... wasn't a 5th injector added to the engine to deal with the carbon buildup on the valves? At Camp allroad this summer, the injector was shown to me and an impressive explanation of how it works was given.

It's only used on flex fuel cars to help aid ignition on start-up. Once the engine starts it stops cycling. It literally cycles for a couple seconds and then shuts off.

[adamazing]

Catch cans do absolutely nothing for these cars if the cars are daily drivers.

Even if the substantial service is minimal, the sheer reduction in oil blow-by into the IC piping is enough to justify it's purpose for me.

[treginginco]

+1 if the car is driven hard each time driven with no short trips and proper warm up catch is not needed.

Then I should be golden, because I spend 80% of my time blastin' down the highway.

[vsaudi]

I am glad I have one. Usually only empty at each oil change and about 8oz of yellow goo comes out.

[zokissima]

Catch cans do absolutely nothing for these cars if the cars are daily drivers.

How so? what's the difference in a daily driven vehicle?

[jfo]

Catch cans do absolutely nothing for these cars if the cars are daily drivers.

Is this just your supposition or do you have technical/test data that shows this?

[blbroo]

The PCV system is a compromise by auto makers due to environmental rules. Instead of the old methods of breathers or dumping the oil into the exhaust, to be burned off, it's now put back into combustion, ahead of the catalytic converter. Catch cans are a better route to handle blow-by, but aren't a consumer friendly option. Automakers would need to add some sort of tank that needs drained periodically, which would lead to issues with average owners. For a gently driven and non-modified A4, I agree with 01Turbo30V

Am I going to notice a big difference running the can, maybe not, but I bet someone like Lettuce, with his quart loss per 500 miles, will.

This is an interesting article with some equally interesting comments.

http://oppositelock.kinja.com/ditch-...ate-1634156554

"I had a 300,000+ mile VW Rabbit Diesel years ago that had so much blowby it would literally pool up oil in the intake manifold, and every now and then that puddle would overflow and feed the engine like fuel, at which time you were off to the races whether you wanted to or not! I used a 1 gallon windshield washer jug and some heater hose off the PCV system to build a 1 gallon catch can. I had to empty it every week or we were going for a random wild ride. I never had to change the oil because I needed to add a quart every time I filled up with gas... in addition to pouring the catch-can back into the crankcase!"

[The Infiltrator]

The PCV system is a compromise by auto makers due to environmental rules. Instead of the old methods of breathers or dumping the oil into the exhaust, to be burned off, it's now put back into combustion, ahead of the catalytic converter. Catch cans are a better route to handle blow-by, but aren't a consumer friendly option. Automakers would need to add some sort of tank that needs drained periodically, which would lead to issues with average owners. For a gently driven and non-modified A4, I agree with 01Turbo30V

Am I going to notice a big difference running the can, maybe not, but I bet someone like Lettuce, with his quart loss per 500 miles, will.

This is an interesting article with some equally interesting comments.

http://oppositelock.kinja.com/ditch-...ate-1634156554

"I had a 300,000+ mile VW Rabbit Diesel years ago that had so much blowby it would literally pool up oil in the intake manifold, and every now and then that puddle would overflow and feed the engine like fuel, at which time you were off to the races whether you wanted to or not! I used a 1 gallon windshield washer jug and some heater hose off the PCV system to build a 1 gallon catch can. I had to empty it every week or we were going for a random wild ride. I never had to change the oil because I needed to add a quart every time I filled up with gas... in addition to pouring the catch-can back into the crankcase!"

Great info!!! That's a lot of damn oil for your old rabbit, crazy!

[blbroo]

Great info!!! That's a lot of damn oil for your old rabbit, crazy!

I was quoting someone from that link. I've never owned a VW rabbit. When I was a kid though, we had pet rabbits and mine would sit on a skateboard while I pushed it around.

[The Infiltrator]

I was quoting someone from that link. I've never owned a VW rabbit. When I was a kid though, we had pet rabbits and mine would sit on a skateboard while I pushed it around.

Ha, didn't see the quotations.

Trying to read these posts and do work at the same time doesn't always work.

[99r6]

I was quoting someone from that link. I've never owned a VW rabbit. When I was a kid though, we had pet rabbits and mine would sit on a skateboard while I pushed it around.

Pics or it didn't happen

[Audibot]

I was quoting someone from that link. I've never owned a VW rabbit. When I was a kid though, we had pet rabbits and mine would sit on a skateboard while I pushed it around.

lol. Me too.

[hyperunion]

Catch cans do absolutely nothing for these cars if the cars are daily drivers.

Agree... Especially in our cold climates in PA possible more harm then good, main reason I am staying away... I've heard nightmare stories of lines freezing, valve covers over pressurizing, blowing engines.. Even ecs tuning , with their new catch can setup, recommends removing the system and reverting back to stock every winter in cold weather climates. Who wants to do that!...

[Party_Marty]

Alright, So I keep going back and forth between needing a catch can and NOT needing one. I drive my car daily and the drives are around 40 min one way. I have a 2014 B8.5 and I don't hound it everyday but I like speed . Over the weekend I changed out my fogs for LED Phillips 6000K (which are awesome btw ), to get to the drivers side I disconnected the one intercooler hose and a bunch of oil spilled out....I would say less than a 1/2 fluid ounce, not much, but oil none the less and that right before my intercooler which means to me my intercooler could be sludged up with the stuff.... Opinions?

[dennisA4]

+1 if the car is driven hard each time driven with no short trips and proper warm up catch is not needed.

What about 15-20 min trips, all city with tons of stop lights, max speed 35-40 mph?
That's my daily commute.

[JenteMachiels]

Might be a seriously stupid question, but I really don't know :x So please no raguing cause it might be stupid. Is a catch can any good for diesel engines also?