oil in air Intake

[keith4jb1]

I just bought a 4JB1t to fit into my landrover as it seems to be a quite capable engine.
I am now abit concerned because i found some oil in the air intake pipe, and between the turbo and the intake manifold.
I think that the cause is due to a pipe coming from the back of the tappet cover to the air intake pipe.
Can anybody confirm this and point out if there is something wrong?

Keith

[James W]

It's quite commom for these engines, no real harm done by it except making a mess and possibly cloging things up. Do a search here for "oil catch can" or "breather". There are kit's aviable or some people have done it as a DIY project.

Where are you Keith?

[keith4jb1]

Well, i'm from malta, the other side of the world! Its a small island in the middle of the mediterranean sea, just under sicily.

I made a search about oil catch cans, and found that its not that difficult to do, and i am going to try one out myself. Any tips or pics would be appreciated.

today I took off the intake manifold as i saw that it was also quite oily inside, and made a huge mess to clean it! the first two inlets where clean, although the rear two were rather oily!

i was thinking, if the pipe coming from the back of the tappet cover could be blocked or else be joined to a longer pipe and directed to beneath the engine, so that any oil will go out.
what do you think abou this?

[Harry]

Don't block the pipe off.This is the engine breather and if you block it the crankcase will pressurise and force oil past the front and/or the rear oil seals.
Good luck,Harry.

[mulover]

I also have a 4jb1t and i tried putting a k&n filter on the breather pipe through a 90 degree bend. the motor blew out quite a bit of oil which made a big mess under/around my engine bay. With the breather connected to the air intake the motor never uses oil and goes just as well as it did with the breather disconnected. Some people say a little oil around the turbo is good for it any ways. But thats just my experience.

[keith4jb1]

So what is that solenoid attached to the maifold for?
And could I just disconnect the pipe from the manifold and the air intake ( and leeve it danglig down) and work normally? I think that it would reduce the emmissions in the same time! as the oil would not be burnt at all.

[geeves]

If your talking the 2 valves on the intake manifold they are for Exhaust gas recirculation and we normaly disconect them and seal the hole. I dont know if your emmisions laws would alow that .
The idea with the breather pipe is not good as the blow by gasses from the crankcase are more polutting than the small amount of burnt oil. Also any oil getting blown through would drip on the ground.
Much better to leave everything attached as original and if it burns too much oil then fit a catch can.

[keith4jb1]

10x for your replies, i appreciate your feedback very much.
Geeves, I was referingto the solenoid/valve that connects between the engine breather pipe and the manifold (on the engine side, not the EGR). and was asking what is its function.

[draganlada]

That is sort of blow-off valve which protects engine from owerboost if something goes wrong with turbo and it makes too much boost.
There are two ways to prevent turbo and air intake get too oily.
First; never owerfill engine with oil (max mark on the deepstick is realy "MAXIMUM" and everithing betveen max and low is "OK" ).
Second; install an oil catch can and
Third; combine 1-st and 2-nd
I've noticed allmost every time at oil change I owerfill the engine what couses oil catch can being filled up with blown oil untill oil level in the engine gets right ( after 2000 km roughly ),after that oil level in both engine and catch can are staying same rigt to the next oil change.
Houpe this helps ( this is from my personal experience )

Dragan

[keith4jb1]

Ok, i will get to build my own oil catch can whenever i get some time, although i found this site www.pbase.com/rsrock/oil_catch_can and the procedure seems to be auite simple.
Maybe abit small if any.
10x again