Oil Breather advice

[nichollsvts]

Hi all,

I'm using a standard OEM box with Panel filter and cold feed setup on my Mk2 VTS, but still have the oil breather pipe feeding into the box, and wonder if it's worth getting an oil breather filter fitted?

Thanks,

[phill1990]

im wondering this to...

[nichollsvts]

Anyone?

[nichollsvts]

Don't like doing this, but bmp.

[mainy91]

ive been wondering about this aswell

[woodysVTR]

You can do, it'll stop the burnt oil from feeding back into the inlet thus creating better quality air feed; but attaching an oil filter vents the oil vapors into the engine bay and onto the underside of your bonnet leaving a fair bit of muck on it and you might get a whiff of it in the cabin too. Better to get a catch tank

[lukee_VTR]

Yea get a catch tank if you can, i had a cheapy one on there and it was leaking alot.... but i purchased the pipcross oil breather from halfrauds for £20, does the trick mate, no nonsense and actually reduced the amount of residu oil over the engine bay. :y:

[nichollsvts]

Cheers lads,

Do I just add this on to the orginal pipe coming out the top of the head, or should a get a longer one and tuck the tank to different place?

[Liam_]

I would just leave it alone tbh - the standard breathers should be more than ample unless you're running a hugely tuned engine.

[nichollsvts]

I saw it as your putting warm air back through inlet. So removing this and applying Oil breather or Catcher, it would improve air quality as mentioned above. I looked for a decent oil breather/catcher, and the only decent place that seems to do this is Halfrauds.

There's also a second small pipe coming out the block, no bigger than 4mm which goes into the intlet. Does this need removing also If I add an oil breather?

[Liam_]

You do end up with a little bit of oil going back through the inlet and it does gunk up the throttle body/ sensors over time. IIRC, the oil vapours also affect combustion in the sense that they weaken the bang, so to speak (there's a big thread on here somewhere about the pros and cons of catch tanks).

The way I see it is, they were plumbed back into the inlet for a reason. Unless your engine breathes heavy and you get a lot of crap going back though, I'd leave it as is.

The 'second' breather you refer to goes to the sump - no need to alter that one. :)

[nichollsvts]

Gave it clean when I had it in bits, but nothing massively gunky. Oil is changed regulary anyway.

[adamskiTNR]

I have a catch tank and am plumbing both the rocker cover and crankcase breathers into it, with the return going back to the air system to prevent all the oil smelling fumes getting through to the interior

[nichollsvts]

I have a catch tank and am plumbing both the rocker cover and crankcase breathers into it, with the return going back to the air system to prevent all the oil smelling fumes getting through to the interior

Any pics?

[adamskiTNR]

no sorry, it's still in progress. i need to tap the third hole into the drain plug of the standard catch tank. this is why the more expensive tanks such as Mocal have three nozzles instead of two

[Liam_]

The Mocal catch tanks have a breathable cap so no doubt the fumes would be just as bad. If the smell is a problem, I'd just use a long length of pipe pointed down towards the road with a breather filter on the end.

[adamskiTNR]

thats what i was just pondering lol. got there before me