Is this normal??..

[europeanme]

having started to look at changing hoses in my avant, I noticed the moisture on the 2 hoses in the pictures below.....

should I be worried??...and how should I fix it??....

these are probably 'normal and common' amongst the 5 pot but to me they look a little worrying...as if something was blocked....

any ideas??.....thanks for any help...

cheers

Mike

[Rusty]

It's an engine bay that's not been cleaned in XX years, a bit of oil is to be expected. Give everything a good check over, looks like the PCV and cam cover gasket are leakign a touch from the pics, keep an eye on it.

[europeanme]

PCV??...a valve of sorts??...

I was wodering if these pipes were breather pipes of some description...as I am potentially looking at a catch tank....would this help??...

[s2_bo]

Looks to me like your crank case breather is in need of a clean and most likely replacing too.

I bet those hoses are split, so the moisture that your seeing there is actually oil vapor that's leaking and should be vented through the PCV system.

[s2_bo]

Catch tank would solve that. Have a search.

[Error404]

Positive Crankcase Ventilation - breather system basically. Might be a bit blocked and sweating, as Andy says its probably never been cleaned either.
IIRC some of those breather hoses are uber expensive / NLA so if you take it off to clean up etc, go easy

[europeanme]

positive crankcase ventilation??...

[europeanme]

Looks to me like your crank case breather is in need of a clean and most likely replacing too.

I bet those hoses are split, so the moisture that your seeing there is actually oil vapor that's leaking and should be vented through the PCV system.

would a standard hose be ok or is it better to go silicone??...I am looking at ordering some hoses from roose for my suspected boost leak...

[UrS4boy]

having started to look at changing hoses in my avant, I noticed the moisture on the 2 hoses in the pictures below.....Mike

Mike: As others have suggested, that is not "moisture", it's oil vapour from the crankcase ventilation system. While I do not have any specific ABY info, this AAN info should help you to figure out what the deal is:


http://forums.audiworld.com/showthread.php?p=18856239

PS: I've been working in Sooke again this year. Still *REAL* quiet out there.

[Jamo]

You need a new PCV valve and clean the fire trap, car will go 100% better after it I was shocked after changing mine on my Coupe.

[S2central.net]

Yep - the goo that collects in there is dizgusting...

Get a new PCV valve and flame trap (looks like metal coily brushy thing).
Suggest you check all the PCV pipes too for cracks or splits before you order parts up - they are a stupid price from Audi... I have long talked about getting replacements made by Samco but never organised that (amongst other things).

Give the pipes a good check and flush if necessary - the lower section near the valve is always the gooiest... Catch/cyclone tank is your friend - don't vent it open near the bulkhead unless you really like the smell of hot oil.

[europeanme]

cheers boys...I'll get and order one....

is the PCV system under negative pressure only when the engine is running or is it permanently pressurised??....sorry for the numpty questions...

[Error404]

only when the engine is running - the PCV is drawn by the engine "breathing in" the vapour

[UrS4boy]

only when the engine is running - the PCV is drawn by the engine "breathing in" the vapour

Disagree. The AAN and I presume the ABY crankcase ventilation system is a two way street. One way, over to the turbo under idle and the other way under full/part throttle, as shown in the post I gave above and repeated here:

http://forums.audiworld.com/showthread.php?p=18856239

[Error404]

Surely if its plumbed in before the turbo its always under vacuum?