trubo leaking oil

[oldskool rich]

im runnin g a GT2052 on a 1Z and basicly it leaks oil at high rpm, the car it came off only coverd 50k its is as good as new and has no shaft play at all, i thort the oil drain pipe might be the problem as its home made so i made it wider and the problem still persists

is it because im running the wrong oil?

is it because the turbo isnt designed for the same amount of oil pressure as the 1Z produces?

or is my engine haunted?

any suggestions welcome

[dillenger1]

engines definetly haunted! :shock: Do you have the stock feed line with restriction.I guess a cold sart at 100psi can blow the oil seal inside without proper drain.

[oldskool rich]

whats this restriction business about? yes just the stock oil feed off a 1.6td, how can i restrict the flow, i havent made any boost yet so cudnt of blown anything. as for a flange i retapped the stock gt20 one to fit the 1.6 feed

its fine until it hits about 3k then it just weeps a little, not loads just a bit, but i know that even a bit is enough to fill an intercooler after a few hundred miles and make the engine run away with its self

how can i restrict it?

[zukgod1]

The GT2052 has journal bearings and so you can't restrict the feed without grenading the turbo.

Andrew

^^  X2

If its leaking its time to replace the seals, and bearings as they come in a kit and makes no sense to replace one and not the other.

[dillenger1]

isnt the  fitting on the turbo  the restriction?So we dont need a restriction in the feed line to the turbo?

[jtanguay]

what if the turbo wasn't draining properly??? that would make it leak under the right circumstances right???  

where is the oil leaking from exactly??? with 50k on it, it shouldn't leak...

[oldskool rich]

i thort it was new wen i got it, its that gud, it spins perfectly and has no shaft play, the retern comes out a 1.6 flange then is welded to a mk1golf gti oil cooler hose with a banjo on the end which then goes back into the block. the oil is coming out of the turbo, like the way that the air travels, and the housing was cleaned b4 it went on so its not that

i doubt it cud be seals but it might be, who knows

im sure if i cud slow down the flow a little it wud fix things, there must be sum kind of regulator i cud get

i just dont know what to do next :cry:

[oldskool rich]

its not from the CV, im just running a filter like on a beetle that goes into the air

cud it be that the oil isnt warm enough ive only realy had it running cold so far because i cant get it out my garden to drive it yet

[superspringer]

what if the turbo wasn't draining properly??? that would make it leak under the right circumstances right???  

If you are using the turbo with the intricate VNT control in this thread :
http://vwdiesel.net/phpBB/viewtopic.php?t=17378
then the orientation of the bearing housing may well be contributing to the leaking problem. (Although the pictures arent 100% clear of the location of the oil feed and oil drain)

The oil is fed under perssure as you are well aware but it is solely gravity that draws oil away from the turbocharger and back to the sump. The oil drain is ideally meant to sit directly facing the floor when installed, but it is permissable to tilt it up to 15 degrees off centre. Any more than this and the oil could well be backing up inside the bearing housing, unable to drain fast enough once the revs and pressure/flow increase, and escaping sideways out of the piston ring seals.

[oldskool rich]

i think its more than 15 degrees, so this is the problem, i guess im going to have to modify the VNT vains in order to tilt the turbo or they wont fully open or close :cry:

this is doing my head in, how many more times am i gona have to take that ruddy turbo off

btw are you sure this is the problem?
unless i just drive down hills from now on :lol:

[superspringer]

btw are you sure this is the problem?

Without seeing it all then no, im not sure to be honest. (Very limited information)  BUT having the bearing housing tilted over on an angle is VERY likely to make a turbo leak. It is without doubt very heavily contributing to the problem, even if it isn't 100% the root cause of it.

Depending on how the VNT is constructed (with or without locating pins in the top to sit into the bearing housing) you should be able to rotate the VNT control ring and bearing housing into one of 13 increments, (as long as the vanes are equal distance apart then the control ring will fit) then all you'll need to do is modify the linkage from the actator to suit. If there are locating pins in the VNT or turbine housing that sit into the bearing housing then these may need to be shortened or removed...

[superspringer]

btw are you sure this is the problem?

Without seeing it all then no, im not sure to be honest. (Very limited information)  BUT having the bearing housing tilted over on an angle is VERY likely to make a turbo leak. It is without doubt very heavily contributing to the problem, even if it isn't 100% the root cause of it.

Depending on how the VNT is constructed (with or without locating pins in the top to sit into the bearing housing) you should be able to rotate the VNT control ring and bearing housing into one of 13 increments, (as long as the vanes are equal distance apart then the control ring will fit) then all you'll need to do is modify the linkage from the actator to suit. If there are locating pins in the VNT or turbine housing that sit into the bearing housing then these may need to be shortened or removed...

[oldskool rich]

ive bort a bigger oil return from japan to make the turbo work, although, wen you blow down the oil hole more air seems to cum out of the seal than the return, if i needed to change my seal where can i get one from on the cheap, preferably in the UK?

[superspringer]

The seal is simply a small piston ring, not anything special in itself but to get to it you need to strip the turbo and once re-assembled it will need re-balancing.
99 times out of 100 if there is an issue with the seal then it is the land it locates into (ie in the bearing housing or the shaft) NOT the seal itself. It is possible to machine to +0.010" oversize width and/or o.d. piston ring to effectively blueprint the seal.
I used to work at Turbo Dynamics and this kind of thing is their bread and butter, and the work is good quality. I would give them a ring if you want to get it done.
Let us know how it gets on, Adam.