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Author Oil Breather Pipe (rocker cover into the induction pipe).......Why's it there??
MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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14th Jul 04 at 14:48   View User's Profile U2U Member Reply With Quote
I am considering a rethink of my induction set up which will involve removal of most of the standard OE induction piping, coz its too long and very restrictive.

At one point, a breather pipe (coming from the the rocker cover), joins the induction pipe (i've seen this on many cars), obviously carrying oil vapour.

However, why is it there? What is its use? What problems will i come accross if i remove the pipe, and replace with a little piper X breather filter thing.

thanks

Matt

PS: note, mine is a turbo, so are they any extra problems this could cause?

[Edited on 14-07-2004 by MattyB]
Adam-D
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Registered: 11th May 02
Location: Cheshire
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14th Jul 04 at 14:56   View User's Profile U2U Member Reply With Quote
you can make a oil catch tank and put a breather filter just after it, itll be ok
MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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14th Jul 04 at 15:02   View User's Profile U2U Member Reply With Quote
cool but i'd rather just not spend any money on it at all! lol.

Could i not just block it.
Adam-D
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Registered: 11th May 02
Location: Cheshire
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14th Jul 04 at 15:03   View User's Profile U2U Member Reply With Quote
dont block it
ak did it with a bit of pipe a small sprite bottle and a breather filter
Greasemonkey
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Registered: 17th Apr 02
Location: Drives a Tractor
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14th Jul 04 at 15:05   View User's Profile U2U Member Reply With Quote
its for environmental purposes, oil vapour is a little toxic, my breather runs down behind the front arch liner and exits towards the floor, ya dont want toxic vapour in ya engine bay, it smells and gets sucked into ya air vents and blown into the cabin,
MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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14th Jul 04 at 15:08   View User's Profile U2U Member Reply With Quote
Oh rite.....so i could run some 1" pipe down and away, and just leave the end open?

i dont see where the 'vapour' comes from? just from round the cams and stuff?

Matt
Adam-D
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Registered: 11th May 02
Location: Cheshire
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14th Jul 04 at 15:20   View User's Profile U2U Member Reply With Quote
you could but id advise a filter too
MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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14th Jul 04 at 15:34   View User's Profile U2U Member Reply With Quote
i've heard people say that the vapour acts a lubricant and rust prevention on the fins of the turbo? Or is this just crap?

[Edited on 14-07-2004 by MattyB]
Greasemonkey
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Registered: 17th Apr 02
Location: Drives a Tractor
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14th Jul 04 at 15:41   View User's Profile U2U Member Reply With Quote
i think the vapour is from the sump its what gets past the piston rings?????, i had a 7mm gouge in my no1 cylinder wall due to gugeon pin coming detached and man was there some vapour, my car became a kettle lol
Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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14th Jul 04 at 16:18   View User's Profile U2U Member Reply With Quote
i asked this exact question on mig yesturday, basically you need to keep it there as it lubricates the turbo and stops the veins rusting up. however a oil catch tank is the best option, but the chanes are there isnt much oil that goes down it anyway.
Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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14th Jul 04 at 16:19   View User's Profile U2U Member Reply With Quote
oh and dont block it up as your car will piss out blue smoke
iceman
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Registered: 22nd Jul 00
Location: Berkshire
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14th Jul 04 at 16:23   View User's Profile U2U Member Reply With Quote
get a catch tank from think automotive i paid 100 quid for a chrome 1 then get some pipe then bobs ur uncle
Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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14th Jul 04 at 16:23   View User's Profile U2U Member Reply With Quote
http://www.migweb.co.uk/forums/showthread.php?t=138550
MattyB
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Registered: 13th Nov 01
Location: 118.5bhp :D
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14th Jul 04 at 17:06   View User's Profile U2U Member Reply With Quote
cool
Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
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14th Jul 04 at 17:07   View User's Profile U2U Member Reply With Quote
im gonna get a catch tank, im liking doing engine stuff now
DaveC
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Registered: 29th Mar 02
Location: Buckinghamshire
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14th Jul 04 at 17:12   View User's Profile U2U Member Reply With Quote
in addition to the lubricating, its there as part of the crank case ventilation system, in the olden days this used to vent to atmosphere underneath the car, it vents blow-by gasses and toxic oil vapour that collects in the crankcase.

These days all vehical emmisions must be vented through the exhaust, so they are drawn from the crankcase via the rocker cover through this pipe then re-burned and shoved through the exhaust pipe.

Hope that helps a bit!

Dave

ps if you do a google search for positive crank case ventilation there are loads of topics on it
stripes1976
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Registered: 2nd Nov 04
Location: beer garden
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26th Mar 05 at 23:31   View User's Profile U2U Member Reply With Quote
If you pass too much vapour back into the inlet it can cause excessive carbon build up and pre-ignition and detonation. It also lowers the output of your engine it kinda defeats the object of putting say optimax in if its pumping gasses into the inlet which has the opposite effect that the higher RON rated fuel has. It wont be a significant difference but on say a high boost aplication it can dramatically effect the amout of boost you can run!!!
waynep
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Registered: 20th Apr 02
Location: london
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26th Mar 05 at 23:34   View User's Profile U2U Member Reply With Quote
this was over a year ago !! grr grave diggeeeeeer
Morley
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Registered: 17th Dec 03
Location: Lancaster, Lancashire
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27th Mar 05 at 00:23   View User's Profile U2U Member Reply With Quote
freaky shit, I was going to ask a similar question just now, the threads ancient, thats just fait that this was revived from the dead LOL

 
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