25 replies to this topic

[Phil-R]

Check this link again...

 

 Garret says it needs 40-45PSI  at max revs.

 

If you're getting 40PSI at idle then you are well over Garrets recommendations for pressure when the engine is revving. Sure, your drain may not be optimal, but if you can lower the feed pressure with a restrictor, and increase the crankcase breathing, that might be all you need to do.

 

EDIT: yeah I'm always editing my posts. It's a bad habit of mine

Edited by chrome, 24 November 2014 - 12:02 PM.

[coopdog]

Check this link again...
 

 Garret says it needs 40-45PSI  at max revs.

 
If you're getting 40PSI at idle then you are well over Garrets recommendations for pressure when the engine is revving. Sure, your drain may not be optimal, but if you can lower the feed pressure with a restrictor, and increase the crankcase breathing, that might be all you need to do.
 
EDIT: yeah I'm always editing my posts. It's a bad habit of mine

Hmmm yeah mine runs at 60psi at revs hmmmm

How can I work out the psi going into the turbo though? Because it does have some sort of restricter in it ATM

Does it matter where I put the breathers? Like if I put them on the rocker cover will it still relieve crank pressure?

[Phil-R]

You need to to put a gauge between the restrictor and the turbo, so it depends where the restictor is at the moment. Have you seen the restictor, or are you assuming it's just built into the turbo? I know little about the T2 but would have thought there wasn't a restrictor by default. Temporarily rigging up a dial under the bonnet might be as easy as spending £10 on fuel hose, fittings and a cheap gauge from ebay, but I think it's best if you can describe exactly how you've got it rigged up no - A photo would be perfect.

 

The engine block can vent through the push-rod holes into the rocker cover. The general consensus  is, the more breathers the better.  I can't tell you how much this will help on top of your tappet cover vent, so just test it for a minute without the oil filler cap to see if that makes a difference. 

[coopdog]

You need to to put a gauge between the restrictor and the turbo, so it depends where the restictor is at the moment. Have you seen the restictor, or are you assuming it's just built into the turbo? I know little about the T2 but would have thought there wasn't a restrictor by default. Temporarily rigging up a dial under the bonnet might be as easy as spending £10 on fuel hose, fittings and a cheap gauge from ebay, but I think it's best if you can describe exactly how you've got it rigged up no - A photo would be perfect.

 

The engine block can vent through the push-rod holes into the rocker cover. The general consensus  is, the more breathers the better.  I can't tell you how much this will help on top of your tappet cover vent, so just test it for a minute without the oil filler cap to see if that makes a difference. 

 

 

ill show you what im working with

this is the end that goes onto the 90* fitting which goes in the turbo

 

where it was leaking from

 

 

like i said this is the best drain i can do with the space

 

Edited by coopdog, 24 November 2014 - 04:12 PM.

[Phil-R]

Scrap what I said about Garrett's pressure recommendations. I was accidentally looking at the ball bearing turbo figure, so although you're pressure does sound a bit high to me, it might not be the problem. Maybe double check it later with another gauge.

 

Also, your drain looks fine. It's a decent size and as long the U bend doesn't go down then back up, no oil is going to get trapped there.

 

So two things left to do - check what happens with the filler cap off and work out where that leak is coming from. Personally,  I'd get the turbo out and strip it.

[coopdog]

Scrap what I said about Garrett's pressure recommendations. I was accidentally looking at the ball bearing turbo figure, so although you're pressure does sound a bit high to me, it might not be the problem. Maybe double check it later with another gauge.

 

Also, your drain looks fine. It's a decent size and as long the U bend doesn't go down then back up, no oil is going to get trapped there.

 

So two things left to do - check what happens with the filler cap off and work out where that leak is coming from. Personally,  I'd get the turbo out and strip it.

 

 

just so you know the turbo has just been rebuilt

 

and like you said i'll check the breathers asap :)

Edited by coopdog, 24 November 2014 - 07:29 PM.

[mini13]

ok on the breather front, i think you do need more,

 

I have been using 1 breather of about 1" diameter.... I bring the transfer case into the rocker box with a 1" pipe, and then vent the roicker box via a 1" pipe to a catch can,

 

I would say you need to vent the crank case as most of the ventage originates from the rings,and there is not that much area for this gas to get up to the rocker box past the push rods.

[coopdog]

I don't have a dizzy now, could I use that hole?

Edited by coopdog, 24 November 2014 - 11:33 PM.

[mini13]

Yep, you might get a lot of splash up it, so either add a baffle, or make the pipe long and upright, but it will do even if it's only to try it.

[gazza82]

Have you got a fuel pump hole on your block? You might find one of these helps ...

 

http://www.dsnclassi...t-billet-alloy/

 

http://www.dsnclassi...t-billet-alloy/ also do 1/2"

 

I'm also sure I've seen a breather conversion for the dizzy hole .. just can't find it ...

Edited by gazza82, 25 November 2014 - 09:28 AM.

[coopdog]

Have you got a fuel pump hole on your block? You might find one of these helps ...
 
http://www.dsnclassi...t-billet-alloy/
 
http://www.dsnclassi...t-billet-alloy/ also do 1/2"
 
I'm also sure I've seen a breather conversion for the dizzy hole .. just can't find it ...

Yeah I've got that haha

I'll have a look round for the dizzy breather