Oil breather and catch tank

1. Alexp Central South Joined: Jun 2006 East Sussex Posts: 3105 VTS :)

   #1 8th June 2007, 15:30

   Atm i have a breather filter, it's slowly but surely leaking oil.
   
   I'm thinking of putting in a catch tank, then plumbing it back into the other breather on the TB, would this work.
   
   Quick P\S to show
   
   
2. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

   #2 8th June 2007, 15:32

   if you have the catch tank then put the breather on that. The only reason your breather pipe goes back into the induction system is so the oil can be burned off to save the environment.
3. Alexp Central South Joined: Jun 2006 East Sussex Posts: 3105 VTS :)

   #3 8th June 2007, 15:41

   i did think about that, but wasn't sure due to picky MOT testers
4. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

   #4 8th June 2007, 15:42

   What do you mean by "plumbing it back into the other breather on the TB?"
5. saunders Saxperience Forum Bum Joined: May 2006 Kent Posts: 3669 Fiat Seicento, MK2 Furio 2000 X, Pug 206

   #5 8th June 2007, 15:44

   Jusus!! that bay is dirty, you should be ashamed
6. Alexp Central South Joined: Jun 2006 East Sussex Posts: 3105 VTS :)

   #6 8th June 2007, 15:47

   No time to clean ,
   by plumbing i mean putting a T junction in.
7. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

   #7 8th June 2007, 15:47

   Isn't the pipe that goes into the TB actually past the butterfly? I'm not sure if you can mess with this one. If anyone can help explain, please do!
8. doubledavies Established Member Joined: Jul 2006 Posts: 1400

   #8 8th June 2007, 15:49

   iirc it does pass the butterfly
9. doubledavies Established Member Joined: Jul 2006 Posts: 1400

   #9 8th June 2007, 15:50

   this should expalin all
   
   http://www.saxosportsclub.com/Forums...atch+tank.html
10. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #10 8th June 2007, 15:51

    That doesn't explain anything... ??
11. doubledavies Established Member Joined: Jul 2006 Posts: 1400

    #11 8th June 2007, 15:53

    Quote:

    Originally Posted by Toad That doesn't explain anything... ??

    *has a spaz attack* shows the plumbing does it not?
12. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #12 8th June 2007, 15:56

    It does?
13. Alexp Central South Joined: Jun 2006 East Sussex Posts: 3105 VTS :)

    #13 8th June 2007, 15:56

    Thats an 8v engine, if i'm not wrong theres two outlets\breathers on the 16v engine.
    
    Breather->Catch tank->2nd breather?
14. doubledavies Established Member Joined: Jul 2006 Posts: 1400

    #14 8th June 2007, 15:57

    click on the link and the first 4 pics of the post shows how the catch tank is plumbed in!
15. doubledavies Established Member Joined: Jul 2006 Posts: 1400

    #15 8th June 2007, 15:57

    Quote:

    Originally Posted by Alex Thats an 8v engine, if i'm not wrong theres two outlets\breathers on the 16v engine.

    correct!
    
    just adjust accordingly! Ill have a look for a pic now
16. ad_vts Infrequent Poster Joined: Aug 2006 Cornwall Posts: 234 Saxo Vts

    #16 8th June 2007, 18:02

    Whats all the pipework above your manifold doing?
17. AlexR Saxperience Post Whore Joined: Aug 2004 Kunt & Sorrey Posts: 5763 Rep mobiles & Joes ma

    #17 8th June 2007, 19:41

    my car passes mot fine with a catch tank and filter. you can always just run the pipe round behind the engine for mot time so it looks like it goes into the back of the engine at a glance, and take the catch tank off. they'll never quibble over that.
    
    big breather deffo needs to be free flowing. if you plumbed it into the part throttle breather inlet(little pipe) it would be restricting the flow out of the crankcase, which would eventually roger a few seals.
    
    in our forum changeover we lost the uber breather system guide. i'm just going to upload it again.
18. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #18 8th June 2007, 19:44

    Oh, so the little pipe (vertical) is the crank case breather pipe?
19. AlexR Saxperience Post Whore Joined: Aug 2004 Kunt & Sorrey Posts: 5763 Rep mobiles & Joes ma

    #19 8th June 2007, 19:49

    http://www.saxosportsclub.com/Forums...80.html#488180
20. AlexR Saxperience Post Whore Joined: Aug 2004 Kunt & Sorrey Posts: 5763 Rep mobiles & Joes ma

    #20 8th June 2007, 19:51

    the whole lot are crank case breathers, they let the blow by(combustion mixture/product) that passes the piston rings and the airbourne oil vapour to escape the crankcase without building up pressure and blowing oil seals.
21. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #21 8th June 2007, 19:52

    That's what I thought, but was told otherwise in another thread... Is there a reason as to why the smaller one appears to go directly into the TB, possibly past the butterfly? Can this one be touched?
22. AlexR Saxperience Post Whore Joined: Aug 2004 Kunt & Sorrey Posts: 5763 Rep mobiles & Joes ma

    #22 8th June 2007, 20:08

    it does bypass the throttle plate, the car is mapped with that as it is. you can block it though and it won't make much difference apart from totally isolate the inlet from crankcase fumes. It is a part throttle breather, it has a reducer inside the throttle body to make it about 1-2mm so not much shite goes through it. on part throttle there is plenty of vacuum there as it is after the throttle plate. then on full throttle there's not much vacuum so the bigger one is used, and there will be a larger quantity of blow by at high revs and high throttle openings. one big no no is plumbing the big pipe into the small one.
23. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #23 8th June 2007, 20:23

    Gotcha! What a read. Just finished. I can see exactly how it works now, thanks!
    
    As you've said, it wouldn't really be that important (performance wise) to add the smaller pipe to a catch tank, as that only really opperates during idle. When you increase the RPM, the WOT breather starts venting out the 'blow by' as opposed to the small breather. Nice one...
24. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #24 8th June 2007, 20:30

    I was just thinking... Would you want to block the small breather off, or take it to the same catch tank as the WOT breather, but with its own pipe?
25. AlexR Saxperience Post Whore Joined: Aug 2004 Kunt & Sorrey Posts: 5763 Rep mobiles & Joes ma

    #25 9th June 2007, 01:59

    I did put a screw in the throttle body where the small breather goes in, to block it off. Didn't really make much difference apart from the water vapour in the breather system. I decided that i would rather have that vapour go into the inlet than emulsify my oil :o
26. Alexp Central South Joined: Jun 2006 East Sussex Posts: 3105 VTS :)

    #26 9th June 2007, 09:56

    Thanks for the info guys, think i will just add a catch tank to the breather filter i have.
27. Col468 L-plater Joined: Dec 2006 Northwich Posts: 85 Toyota Carolla Saxo Furio!

    #27 11th June 2007, 01:18

    im confused about that guys setup...
    Normal:
    
    
    His:
    
    
    am I right about the airflow? if so why would he want his oil catch tank just having air flowing through it....
28. stevenet15 Saxperience Forum Bum Joined: Jun 2006 aylesbury buckinghamshire Posts: 4822 Astra Turbo, saxo vts, punto turbo

    #28 11th June 2007, 09:30

    Quote:

    Originally Posted by Col468 im confused about that guys setup... Normal: His: am I right about the airflow? if so why would he want his oil catch tank just having air flowing through it....

    arrows are facing the wrong way mate lmao
29. Col468 L-plater Joined: Dec 2006 Northwich Posts: 85 Toyota Carolla Saxo Furio!

    #29 11th June 2007, 09:41

    lol aah, just me being silly!the induction sucks the air in of course!