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Author Topic: Why get a catch can?  (Read 2563 times)

Offline Hurdy

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Why get a catch can?
« on: July 30, 2009, 12:35:46 pm »
FSI engine after 19k miles!!!!!! :scared: :surprised:

http://i10.photobucket.com/albums/a140/pippyrips/DSCN3441-1.jpg

http://www.clubgti.com/forum/showthread.php?t=189147

I'll be looking at mine with interest as it has 18k miles on it at the moment!
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Offline SteveP

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Re: Why get a catch can?
« Reply #1 on: July 30, 2009, 01:33:41 pm »
Dread to think what mine look like now with 43K on  :scared:

Probably a like "shutting the stable door after the horse has bolted" by me putting the BSH can on last week  :fighting2:
« Last Edit: July 30, 2009, 01:49:29 pm by SteveP »
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Offline MAT ED30

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Re: Why get a catch can?
« Reply #2 on: July 30, 2009, 01:39:40 pm »
Mines done same as u steve milage wise so should I worry  :scared: or do I just get the can put on ? Might get vwr to have a look at mine when I am down next
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Offline Hurdy

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Re: Why get a catch can?
« Reply #3 on: July 30, 2009, 01:40:11 pm »
Put the thankyou on this post for the info in the PM Steve :wink:

My engine will be swapped for a low mileage one in the next month or so, which means it'll get a good fettle and a catch can system fitted. :happy2:
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Offline RedRobin

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Re: Why get a catch can?
« Reply #4 on: July 30, 2009, 01:47:47 pm »
^^^^
And mine at 71k?

So, is there a thread here about how to check this yet please?

[Just seen Mat's post....Yep, it'll be on my list for VWR too :happy2:]
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Offline SteveP

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Re: Why get a catch can?
« Reply #5 on: July 30, 2009, 01:53:56 pm »
Quote from: Hurdy on July 30, 2009, 01:40:11 pm
Put the thankyou on this post for the info in the PM Steve :wink:

My engine will be swapped for a low mileage one in the next month or so, which means it'll get a good fettle and a catch can system fitted. :happy2:

No probs, you have another PM about the catch can's too  :happy2:

So what your saying is we should all go big turbo so we can swap the engine and know we have a nice clean set of valves  :laugh: :laugh:
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Offline iainalpine

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Re: Why get a catch can?
« Reply #6 on: July 30, 2009, 01:56:53 pm »
Think i will be joining you guys in this mod. Looks quite bad at the valves. This would end up showing signs of poor compression would it not?

Iain
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Offline DanoGTI

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Re: Why get a catch can?
« Reply #7 on: July 30, 2009, 03:33:42 pm »
Yeh, PippyRips has had some interesting times with his RS4. I know him from Scoobynet too (we seem to follow each other around from Scoobs, to Audi - but I crept off to you guys now!!!)


I'd read about his FSi findings before - quite shocking to be honest. All I can say is that at the moment, thank god for warranty.
2yrs time I might be looking at a catch can....

Dan  :happy2:
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Offline Strat

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Re: Why get a catch can?
« Reply #8 on: July 30, 2009, 03:42:44 pm »
Can someone explain this whole thing in english please!  :smiley:
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Offline joesgti

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Re: Why get a catch can?
« Reply #9 on: July 30, 2009, 03:45:26 pm »
Quote from: Strat on July 30, 2009, 03:42:44 pm
Can someone explain this whole thing in english please!  :smiley:

+1  :smiley:
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Offline bacillus

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Re: Why get a catch can?
« Reply #10 on: July 30, 2009, 04:35:05 pm »
In a nutshell, some oil vapour gets recirculated through your oem pcv back to the inlet valve port. Some of these vapours settle on the intake valves and, over time, the crud you see in the above pic builds up.

What a "normal recirculating" catch can does is condense most of these vapours and store them within the can itself thereby reducing the amount of vapour reaching your inlet valves.

The race type catch can goes one step further by venting any vapour to atmosphere so no vapour reaches the inlet valves. Whilst this sounds ideal vs the "normal recirculating" catch can, you will most likely fail your MOT emission test plus you may also get an oily smell in the car with a light oil coating in your engine bay with it installed.

hth
« Last Edit: July 30, 2009, 04:38:09 pm by bacillus »
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