BOV spraying oil

[Guest]

hi there. I just got a 97 legacy RSB. i got a BOV recently put in. It has now started to spray oil into my engine bay. HELP!!!!

[Joker]

is normal

advice now : plumb it back, kills plugs and generally not advised to VTA on a TT

[BC5RA]

Normal? I don't so.

A little bit overtime is okay, how much are we talking here?

[Guest]

 JoKer said:

advice now : plumb it back, kills plugs and generally not advised to VTA on a TT

whys that?

[Guest boostcut]

because spaghetti unction of vacuum hoses etc rely on vacuum and boost being switched and the bov not being vented to atmosphere.... when you fit a bov on a bd/bg they idle funny and overfuel if i remember rightly

[mazdahard]

mine seems to be fine so far with an atmo venting valve seems to run a little rich on a coldstart but thats it

[DRFVDR]

yup would have to say it not overly uncommon

as the air that is being taken out of the sump from breathers are now instead of being recirculated and the oil being burnt is now being vented to air

solutions are

plumbback(my vote)

an oil catch can (also a good idea)

and finally a new engine to reduce blowby

[Guest]

 boostcut said:

because spaghetti unction of vacuum hoses etc rely on vacuum and boost being switched and the bov not being vented to atmosphere.... when you fit a bov on a bd/bg they idle funny and overfuel if i remember rightly

'

and a be/bh ?

[Joker]

be the same I guess

A light coating of oil around trumpet is normal (after a few days/week) it just blow-by vapour

pissing oil on the other hand is trouble and ytou have bigger worries than a BOV

[KwS]

the thing with VTA being bad, is that the AFM and ECU expect that air to go back into the engine, so take that into account when dumping in fuel. Between gears it can make it backfire, and in the case of my old TT, when it was cold it would stall at intersections.

Now ive got a link, and no AFM.... its teh win (even though im back to plumb-back now anyway)

[BLSTIC]

Yeah that's blow by for you.

If you want to keep the external blow-off valve you will need to have an oil catch can/breather tank. Specifically on the thumb width hose that has oil on the inside of it and goes to the intake between the air flow meter and turbochargers.

As an added bonus it will keep the inside of your intercooler clean as well, and has been known to stop detonation in some cases.

Alternatively, live with your oil coated engine bay, or plumb the BOV back in.