Xu10 Engine Breather Issues

[Crazy-legs! 0]

As it says in the description! I finished my 2.0L turbo conversion, and for 2000 miles it was fine. Then, one evening it started gobbing out oil for no reason!

 

Compresion is good, all four pots are between 11 and 12 bar (Bout 175 psi)

Ive checked for hydro-carbons in the coolant (Duff head-gasket) But its fine.

I've even had the rocker-box and sump off and flushed out all the oil ways!

 

It just seems to be breathing heavier than when i first built it. It runs absolutely beatifily, and doesnt burn any oil whatsoever. Any suggestions would be much appreciated.

 

Thanks, Marc.

[Rob Turbo 3]

Where's the oil coming from?

 

Or where's it coming out of I should say!

Edited December 29, 2007 by Rob Turbo

[Crazy-legs! 0]

Its blowing it out of the main engine breather/filling point.

[ORB 227 1 Cars]

sounds like you have the breathers plumbed in the wrong way?

[Rob Turbo 3]

Do you have the one way valve thing fitted to the breather pipe from the throttle body to the oil filler? If so, is it in the right way round?

 

Try disconecting this pipe and block both ends and see if it still does it.

 

Also, does it spit oil out even at tickover or is it just after you've been for a drive?

[Alastairh 47]

To me, sounds like you've got a blocked breather. Either its full of crap or its got caught on something.

 

If you had the breathers on wrong, you would of had these problems months ago.

 

Just pull them off one by one, check they're all clear, then hopefully that will give you a better indication whats wrong.

 

Al

[sonofsam 5]

Its blowing it out of the main engine breather/filling point.

 

Are you running the stock diverter valve on the pipe going from the oil filler tower to the air intake on the turbo?

could be faulty?!

[Crazy-legs! 0]

All the breather pipes are absolutely fine, im not running any of the standard breather system, ive just got the main breather goin to a catch tank, with everything else blocked off. Before anyone says 'Thats you problem then' as i said earlier, it ran fine for about 2000 miles?

[Crazy-legs! 0]

Well i tried re-fitting the pipe from the oil filler to the T/B via a one way valve (Yellow arrow). But this made no differance!

my other breather, as mentioned earlier goes from the oil filler to a home-made catch can (Red arrow)

 

http://s52.photobucket.com/albums/g24/Char...thersystem2.jpg

 

Also, i noticed that the filler/breather that goes to the block, had a bit of oil blowing back up it, into the filler bottle?

[Rob Turbo 3]

Where does the other hose on the catch tank go? do you have any breather pipe that goes to a filter or the intake system?

 

It looks like you are running a closed system there, which wouldn't help matters, try making a hole in the top of the oil catch tank and putting a filter on so it has somewhere to vent to

[whizzer71 0]

Hi Marc,have you sorted it yet ?,Have you checked the breather take off on the block ,the one thats close to the turbo oil feed ?,on the two turbo engines I have stripped so far these have both been very nearly blocked with a solid black hard substance (like carbonised oil I guess),If this is blocked It will cause excess crank case pressure and the gasses will have no where else to escape to

Either that or you have wear in oil control rings,(wont show on compression test),If you want give me a call again you have my no.

 

Good luck fella

 

[Crazy-legs! 0]

Cheers for your replys guys.

 

Rob, the top hose on my catch tank is just a breather pipe. i've just pointed it at the floor as i got sick of the mess it was making of my engine bay!

 

Tris, When i had the rocker-box and sump off i flushed out all the oil-ways and there didnt seem to be any blockages. The only thing i can think of, is that it may have been partialy blocked when i done my conversion, and since getting it running and doing a couple of oil changes i may have flushed it out causing it to breathe harder?

[monty69 6]

i have same problem on xu10j4 carbed. hasnt done it on road just rollers, going to try borrow a cylinder leakage tester if checking breather hoses uncovers nothing. One theory is that the breather outlets inside the remote oil filler are very small? I will be checking this and if they look restrictive il do away with the filler and make my own. This could cause too much pressure.

[whizzer71 0]

Cheers for your replys guys.

 

Rob, the top hose on my catch tank is just a breather pipe. i've just pointed it at the floor as i got sick of the mess it was making of my engine bay!

 

Tris, When i had the rocker-box and sump off i flushed out all the oil-ways and there didnt seem to be any blockages. The only thing i can think of, is that it may have been partialy blocked when i done my conversion, and since getting it running and doing a couple of oil changes i may have flushed it out causing it to breathe harder?

 

Have you physically removed the hose off the stub on the block and checked it?,otherwise I would be leaning toward the rings,I had a similar problem with an Mi a while ago,started fine ran fine went really well didnt burn oil but pushed it out instead,that was partially gummed oil control and lower compression rings,that showed 175 psi - 180 psi on all 4 cylinders ,so dont take anything for granted specially on a unit that you dont know the history of.

 

[Crazy-legs! 0]

Ok Tris, cheers.

Sounds like i might be pulling her apart again!