Breather / Recuirclation System

[MerlinGTI 3]

I was wondering if insted of having oil contaminanted air being fed back into the engine as peugeot intended, if it would be benificial to have these venting to atmosphere via those little crankcase filters. Is there any downsides to fitting these filters to locations 1, 2 +3 in the below picture? Does anyone have any better ideas or any other input?

 

 

 

Cheers

[MiD 0]

I had one of those attached to my 1.6 Gti when I bought it. If I recall correctly it was in position 3 of your diagram. When the car was having some work done on it by Paul at 205 Parts he removed it. His view was that it was completely unnecessary. Still have it somewhere if you want a fourth!!!!!!!!!!!!

[MerlinGTI 3]

nice one, will send you a pm I havent bought any yet. I can see why one in position 3 would be considered 'pointless' as all thats doing is an 'intake' of air of sorts, in positions 1 & 2 though oily air will be spat out and need a filter.

 

I wou;d still like to know if there are any negitive aspects to doing this though

[DrSarty 90 1 Cars]

I would still like to know if there are any negitive aspects to doing this though

 

There are no negatives that I know of. The re-circulation is all linked to emission responsibilities of manufacturers, and must you could consider that many performance cars run an oil catch tank which ventilates to atmosphere through a filter of this kind.

 

Personally, in the absence of a catch-tank, I'd place this filter near the throttle body where these gacky fumes are reingested into the inlet tract.

[MerlinGTI 3]

Didnt relise how cheap catch tanks were on the 'bay !

 

Think im gonna crank case filter # 1 , mini air filter # 3 and have # 2 fed into a vented catch tank

 

Cheers for help guys

[DrSarty 90 1 Cars]

Personally I'd just use the one breather/filter on the catch tank now you've decided to fit one. Don't waste your money or effort on the others; one is enough.

[davey sprocket 14]

I had it in my head that MOT regulations state the breather must run back into the induction system or have I imagined that??

[Miles 331 1 Cars]

The only one you can remove is from the oil filler cap (2) to the T/B, all the other's must remain as they are at all costs, Blank 3 off as it's the return for No 2

[MerlinGTI 3]

Why must #1 remain at all costs Miles? is it because it will affect how the car runs or because of MOT reg's like davey said?

[unariciflocos 49 1 Cars]

Could someone repost the pics or give indications to where positions 1,2 and 3 are? I'm really interested in this topic, but the pictures seem to have been removed and I can't understand anything without them. Thanks.

[cir287 0]

I cant see the pics so am only guessing where these breathers were proposed for but another reason to be potentially wary of them other than failing your mot and what Miles says is that if you are in the habit of washing your engine bay (or driving through lots of deep puddles) you may need to cover these up as they will be a source of moisture contamination (small I know),

 

Unless its a racing car I wouldnt really bother with them at all, if it is a racing car then I'd use a catch tank. They might look a bit trick to some but I reckon they are a bit of a gimmick.

Just my opinion !

[unariciflocos 49 1 Cars]

What I actually want to know is if I can blank off the smaller outlet next to the oil filter, the one that goes to the side of the oil filler.

[mattbenselin 0]

Hi Andrei and all,

 

What I did was to take the 'fat' tube which goes from the oil filler to the intake hose and re-route that to a catch tank with a filter on top. The smaller hose which goes from the oil filler to the throttle body was removed and both ends blanked off/sealed. I did this because I didn't like the thought of hot oily air going through my engine I prefer just clean oxygen rich air to go in. More of a peace of mind thing I think. A catch tank is a good idea though not just a filter because it's surprising how much residue comes out with the oily gas and even with a tank to catch, leaks out of the filter and covers everything near it!

 

If you imagine filling the sump with oil, the air needs to get out somewhere and if all you have is the oil filler pipe (assuming you have blanked off the other pipe from block to oil filler) the air bubbles will spit out and it will take ages to fill with oil. Why do you want to remove this pipe?

[MerlinGTI 3]

Heres a modified version of the orginal pic. 1, 2 + 3 are in the same location as the opening post picture, but I added 4 + 5

 

 

What im doing now is leaving 1 how is, # 3 will be replaced with a mini air filter, #2 will be blocked off and #4 will run to a small catch tank. #5 is the recuirclation intake on the K&N filter adapter. I will try and source an adapter with out this or blank it off.

[mattbenselin 0]

Number 1: yes leave it alone

 

Number 3: needs to be blocked not replaced with a filter, if not your introducing air into the system after the AFM which is not good

 

Number 2: yes block off

 

Number 4: yes to catch tank

 

Number 5: yes blank it off

[MerlinGTI 3]

#3 is also after the TB butterfly, is this not what allows the car to idle without stalling ?

[mattbenselin 0]

No the idle screw on the throttle body bleeds air around the butterfly within the body itself, not drawing in more air. All the air which passes through the body needs to be metered by the AFM or the engine will not fuel correctly. The 'hole' on top needs to be blanked off.

[MerlinGTI 3]

Intresting, I stupidly didnt consider the idle screw, alough Im still a little confused.

 

Isnt #3 when used as peugeot intended allowing air in? bypassing the afm and throttlebody. What you are saying makes perfect sence, but I now cant see what purpose Pug intended for #3. Obviously its part of the recuirclation system but its also an 'air leak' surely?