kermitt

Hi all have vented my breather to air using a wee filter and blocked the return to metering unit.

Problem is its now smoking heavily on startup which it did not due the day before I changed things.

Might try putting it back the way it was but can't fathom why this would happen all of a sudden.

escort_matt

iTrader: (1)

put it back to meetering unit mate,as it might help control the flow of air or sumthink,

botters

iTrader: (2)

take the filter off the breather and see if it stops it may be restricting your breather system and pressurising the block its a longshot but worth a try

kermitt

Yeah think its defo something to do with the way it is now setup. Was doing some research on other breathers and have seen ones that have a small outlet for what looks like a vacuum hose.

So with the Bailey kit there is no vaccuum hose so when the car is started the oily vapour that has gone through the separator is being drawn back into the engine somehow under pressure and out through my exhaust.

Have I got the right idea here?

Also cheap filter was only £7?

botters

iTrader: (2)

never seen one with a vacuum hose mate the bailey kits should have two feeds going to them at the top from either side of the rocker
an oil drain to the back of the block from the bottom and a vent to atmosphere also at the bottom

kermitt

exactly what i have mate and the way its setup. But was having a look at the autospecialists one and it had what appeared to be an extra outlet that was smaller than the other normal breather hose ones. Unless i never looked at it properly lol.

botters

iTrader: (2)

just seen that on thier website, never seen that before i have a bailey setup like ive mentioned above but with no airfilter on it and ive never had any smoking problems from it

mattman1234

I personally think the crankcase should have a vacum on it,I have a baily sepatator on mine(cosy),and i have the same problem.I'm going to connect the "to atmosphere" pipe,to the intake pipe to pull a vacum on the crankcase,but still have a "t" in the pipe to half vent it to air,otherwise the pull will be to great.Also will just vent the rocker cover to air,to allow air in,rather than connect it to the bailey separator,as this will pull air out,and stop oil from draining from the head..........Its like if you turn a bottle of water upside down,it glugs out,if you make a hole in the bottom(or the top ,as its upside down),the water will pour out.
I think my head is filling up with oil,and seeping past the valve seals,as there is no pull as such ,to pull the oil out.

Tell me if this makes any sense

kermitt

problem with an rst is there is only the two vac outlets on top of the inlet and one of them i use for my boost gauge. So i wonder if i replace the breather with one that has a vac outlet and tee that into the pipe for the boost gauge if that would work better. Should stop it reeking of oil everywhere i go.

kermitt

Spoke with Bruce at Bailey and was informed that I should not be venting to atmosphere when running MFI cos the system needs the vacuum through the metering unit. So I have connected it back up and all is well.

stevealien

iTrader: (1)

It's stopped it smoking by sending back to meter unit ?

kermitt

Yup. The metering unit creates the necessary vacuum to remove the build up of crank pressure.

stevealien

iTrader: (1)

Interesting. My car was smokin. Put a new turbo on cos had loads of play and still smokin. Fitted alloy breather and vented to atmos and blocked meter unit. Still smokin. Not sure if it's burnin old oil off in system or same prob as you. Might try re connecting to meter unit.
Was it instantly better mate ?

kermitt

mine was only smoking on startup after venting to atmosphere. Now that its reconnected it no longer smokes at all. Is yours doing it constantly?

Versus_Creations

iTrader: (1)

You cant just remove and block pipes or change where they go without setting up the whole MFi system.

If it was me i would not return to the metering unit as the used and waste gas will be put back through the engine. With a std running engine thats fine. Anything else needs a seperator and vent to atmosphere.

kermitt

yeah i know i don't want to return but it was smokin oil and stank when warming up. Most tracks won't allow you to vent due to the inherent dangers unless you have a catch tank (which i don't). Evidently there must have been alot of crap going through the system judging by the smoke.

rickbartlett

thats very strange that u had smoke on start up venting to atmos,and now uve gone bk to standard its fine,very weird!

Karlos G

iTrader: (4)

It is very strange, if anything you should have more smoke by not venting to atmosphere because you are burning all those oily vapours! lol
What colour was this smoke? Could be that you just needed the fuelling adjusting and was very rich as the metering unit flap was being sucked down a little further.

kermitt

yes it will be setup soon just waiting on sitech moving premises which will be much closer to me. As far as i was aware the vacuum via the metering unit is lost when venting to atmos. The car stank and was embarrassing to drive. The autospecialists breather looks different and appears to have a vac inlet on top.

kermitt

The smoke out of the exhaust during warm up was blue/grey and stank of oil. There was not a hint of fuel which would have been black smoke. I also had smoke coming through the bonnet vents occasionally.

Now that it is re-connected there is no smoke at all.

essexRSTSouthend

I had trouble with oil going into the metering unit.Its blocked off as jano says above,with no problems.Sounds very strange the problem your having.

Karlos G

iTrader: (4)

If that was the case the car would not run at all.
Your right blue is oil and black is fuel so that rules out over fueling, sounds to me like some how oil/vapour was being sucked out of the engine and fed into the inlet?! lol
Is your metering unit and/or IC full of oil, have you checked?

kermitt

The return to the metering unit was correctly blocked and the breather was already connected correctly.

I haven't check for oil but don't see the need as its no loger smoking anyway and wasn't before I vented.

Will have a look tonight anyway and see if anything has gathered under the flap of the metering unit but I don't see any reason why it should cos everything is new and I am not going through oil.

Karlos G

iTrader: (4)

Yeah it's very odd!
Blue smoke is oil, so that oil is coming from some where and getting into your chambers to be burnt, it's either coming in the inlet or it's getting passed your piston rings (you've already said valve stem seals are new so not that)..... not exactly a lot of options that I can think of.

kermitt

Yeah I know!

As far as I know blue smoke on startup is either turbo, stem seals or valve guides but as I said this is all new and done professionally.

Also if it were any of these I think it would be doing it on startup irrespective of whether the return is connected to the metering unit or vented to atmosphere.

Am gonna remove the breather and hoses and give them a thorough clean then try venting again to see if it makes a difference to the smoking.

kermitt

From Bruce @ Bailey;

Thanks for your e-mail. We only recommend using the return to go through the metering head on S2 RS Turbos, unless the engine is a very heavy breather, then this will cause no problems whatsoever with mixture etc. I am not sure who advised you to vent it to atmosphere, but we strongly recommend that you return it through the metering unit ASAP, before any damage is caused (due to the pressurised cranckase design on MFI CVH turbo units).