oil catch can on a tdi

[SNH]

Any links, pics and handy info please people :thumb2

 

[Banshee]

Any links, pics and handy info please people :thumb2

Where you catching it from and why? :nenau

 

[Sweety]

Still trying to find the pic's of my old T2 with it fitted:doh hopefully i'll get time to look under the bonnet of this one to find a spot for the tank as I want mine fitted on this truck:augie

Just found this thread for you http://www.nissan4x4ownersclub.com/forum/showthread.php?t=23691&highlight=catch

 

[Lazy-Ferret]

This any help?

 

[SNH]

The can is covered it's more the plumbing in I'm after :thumb2

 

[Barrbeast]

Where you catching it from and why? :nenau

Catch cans connect between the crankcase breather and the air intake pipe to remove the oil mist from the air coming from the breather pipe. Helps stop it covering the inside of your turbo and intercooler (if you have one) in oil and also helps keep the MAF clean.

You drain/empty the oil out the catch can periodically although some folk plumb a return into their sump so they never need to empty it.

 

[SNH]

Best thing I ever did was fit one on the car. The gunk that came out of it was lovely :lol






I just need pics/info on where to plumb it in and whether or not to keep the original plastic one in line aswell

 

[SNH]

Had a word with the guy making my catch can and we're thinking of mounting it where the original valve sits. It'll be bigger diameter and a bit deeper.
Check out my amazing drawing of the mock up :lol

 

[Banshee]

Had a word with the guy making my catch can and we're thinking of mounting it where the original valve sits. It'll be bigger diameter and a bit deeper.
Check out my amazing drawing of the mock up :lol

:lol :lol :lol :lol :lol

That's brilliant, make me one and I'll square you up :naughty

 

[SNH]

I'm gonna copyright the design drawings first :lol

Seriously tho if anyone's interested I can get a price off him once it's finished :thumb2

 

[Banshee]

I'm gonna copyright the design drawings first :lol

Seriously tho if anyone's interested I can get a price off him once it's finished :thumb2

Yeah count me in, that pot of crap was enough to convince me :clap

 

[Lazy-Ferret]

I take it that gunk was from a Petrol car?

I am sure there are others out there that know more about the science behind it all, but from my exhaustive experience of trying to stop my T2 burning oil when I first got it, I am pretty sure your idea will not work.

Basically, the problem is, when the turbo starts to suck from the air filter side, which is where the output of the catch can is connected, it lowers the pressure on the top of the engine. This has two problems, firstly, it slows/stops the oil from draining back into the sump efficiently, leaving more oil at the top of the engine to splash around and create vapour, and secondly, it pulls all the vaporised oil out into the vent piping.

The standard unit fitted to the T2, has a one way valve built it, which shuts off the link to the rocker cover, when the Turbo's suck, is greater than the pressure built up in the engine, stopping this problem.

If you do what you have drawn, you are just removing the valve, which then makes yours effectively just a faulty version of the current valve.

As I said, I tried many ways of fitting mine, and the only way I found that actually stopped most of the oil getting to the turbo is to replace the faulty T2 breather valve, and as my engine is worn, and the pressure in the crank is higher than it should be, I then fitted a second catch tank in the system after the valve to catch any oil vapour that still got through. I also had to fill this with wire wool to give something for the oil to condense onto. In my case, I have it plumbed the drain via a T piece into the the sump return from the breather control valve so never have to clean it out.

I did open it all up one time, just to see what it was doing, and it just had a covering of black engine oil inside it.

By the way, you can replace the T2 unit much cheaper, if you look for the one fitted to Land/Range Rovers, it is identical.

Ebay search link... ROVER ERR1471

 

[SNH]

Ahh so there is actually a valve in it. This is good to know as we weren't 100% sure and the bits I've found online regards fitting a can are a bit sketchy.
The best idea would be to leave that valve in place and tap into the sump pipe then but where does that leave the other connection?

Yes mine was in a petrol and an occ is there to stop what I got out of the can going back into the inlet/turbo side of things. Is it not the same principal on a derv? I've only had petrol so I'm new to this tbh.

 

[Lazy-Ferret]

Ahh so there is actually a valve in it. This is good to know as we weren't 100% sure and the bits I've found online regards fitting a can are a bit sketchy.
The best idea would be to leave that valve in place and tap into the sump pipe then but where does that leave the other connection?

Yes mine was in a petrol and an occ is there to stop what I got out of the can going back into the inlet/turbo side of things. Is it not the same principal on a derv? I've only had petrol so I'm new to this tbh.

Not sure about how different the principles of Diesel and Petrol breather systems are, but on the 2 diesels I have had, the breather circuit does not seem to get any of the nasty gunk in it, that all the petrol engine cars I have had. Maybe I have just been lucky though. I wonder though if it is that Petrol kills oil, where as Diesel is oil.

On mine, I have pipe from Rocker cover to my catch can, then from catch can to the I/P to the Breather control Valve, then from that to the air intake. So basically, I just replaced the pipe that runs from the top of the engine, so it went via the new OCC. As I said, my OCC had a drain port, so I just ran a pipe from that, and Tee'd into the pipe that runs from the bottom of the Breather control Valve, making sure all the pipes stayed running down hill.

If you take the black breather control valve off, you can test it, but I would not recommend doing what I did, and using your mouth..... Tastes oridable...

Basically, you should be able to blow through the input (the tube with the "O" ring), and get air out of both other ports. If you block the drain port (the one on the funnel shaped bit at the bottom), you should not be able to blow through the outlet port and get air out of the inlet.