Newly Turbo'd 3B burning oil???

[1989BJ70]

Hi all,

Sorry if there's threads that could give me this info but I'm away for the weekend and only have my phone so it makes it a bit tedious searching everything on here.
Anyway I installed a turbo glide kit on to my 3B approx 3000 k's ago, along with a fresh oil and filter change.
I started getting very low oil pressure readings (on both the dash and aftermarket gauge)
I had been getting low pressure readings for a while but only once the engine warmed up which is fairly common I think but just didn't even think that it would be a result of oil loss.
The engine has never burnt oil or lost any oil between changes however after the very low pressure reading I checked the dipstick and the oil level was below the empty line! Hardly even getting a reading on the dipstick!
Is it normal to burn this much oil after this much time/Kim's??? And are there any problems I might have caused due to the low quantity of oil??

Feeling very stupid to have missed the obvious!

Cheers

 

[cody c]

You may have too much oil to your turbo bearings, and could be pushing oil into the intake, some folks install a restrictor as it is a somewhat common problem.

Also, the bearing/seal could be worn and the oil could be bleeding through.

Check your intake piping from your turbo to manifold and see if there is a lot of oil in there.

 

[Clint79]

Check your turbo oil drain isn't blocked or restrictive causing oil to sit and build up in the turbo

 

[Radd Cruisers]

Make sure that you're not pressurizing the crankcase through a crankcase breather that is on the pressure side of the intake system.

~John

 

[1989BJ70]

Thanks guys, I have checked my oil drain and its not blocked or causing any build up of oil, however I did pull off the main air intake piping going across the top of the engine and found plenty of oil in all of it. The whole kit is only 9 months old and I have only done about 3000km's with it so would a seal be gone in it already or do I simply need to install a restrictor? The feed comes from the filter housing so would this be pumping too much oil into the turbo causing it to bleed straight past it and into the air intake?

Radd Cruisers - where would I find this crank case breather and what should it be doing?

 

[1989BJ70]

Scrap that last post I just spoke to John from TurboGlide and John you were right on the money! I hadn't removed the crank case breather hose when I had installed the turbo and like you said I was pressurising the crank case! I'm lucky I didn't blow the thing up! Now I just need to get a plug so that the fitting on the air inlet manifold is plugged off. Any tips on where I should run the breather hose to so that its not going to be exposed to any dirt/mud/water/etc?

 

[cody c]

Do the crank vents not just run to the air intake post air filter/pre turbo?

Im not familar with the crank vent issue, I believe mine just vents off the cam cover, is this something different on post 83 3B's?

 

[Radd Cruisers]

Yeah Baby - Nailed it again!!



It's pretty easy when you've been down that road once before....

~John

 

[Radd Cruisers]

^^^
Oops, not intending to make that Banana look like it's got a problem with Viagra and wrenches...

~John

 

[1989BJ70]

haha nice one John...

Cody on my 3BII the crank case breather hose runs from the back of the cover (where the Toyota logo is) around to the inlet manifold, post filter as you say.
Apparently all I had to do was put a blanking plug on the manifold end and then run a new length of hose off the cover with a small filter on the end to allow the pressure to be released.

I had no idea it would cause that much pressure to build up - it was even causing my dipstick to 'pop' out!

 

[cody c]

Was the breather line run post turbo then? You were pressurizing the engine from the turbo?

I believe many vehicles run the crank breather to the intake so that any vapours from the hot engine oil or un-combusted fuel can be burnt instead of venting to atmosphere (less emissions).

It would be strange that it could cause a pressure to the engine if the crank vent was installed between the filter and turbo.

 

[1989BJ70]

Cody I'm not 100% sure exactly how the crankcase would have been getting pressurised - I think it is a result of installing the turbo but I don't know enough about all this! All I know is that I was told that this breather hose going from the back of the case to the inlet manifold being left on results in pressurising the crank case and all my engine oil being forced out! Is it not possible for this to happen if I have this type of breather hose setup?

 

[cody c]

Oh, your crank breather goes to the intake manifold! I thought it ran to the air filter can.

So, after you turbo'd it the intake air is pressurized, all you need to do is move the connection of the crank breather so that its upstream of the turbo (should actually be a slight vacume) Though just plugging the port off the intake manifold that eats crank vapour, and putting an air filter on the crank vent it should work fine.

Ill have to take another look at mine, but I thought the crank vent just dumped to atmosphere.

 

[1989BJ70]

Yep you got it Cody...it probably would have been easier for me to have chucked a coupe of pics up to explain it better. I went for a short 15 minute drive yesterday and then pulled off the piping, wasn't any build of oil inside but I'm not sure if it would even occur after a 15 minute drive. I'll open her up on the highway over the weekend and we'll see what happens!
Thanks for all your help everyone...