Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > 1- Porsche Technical Forums > 911 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
ibanezjs
 
ibanezjs's Avatar
 
Join Date: Aug 2008
Location: France
Posts: 54
Oil trouble turbocharger

Hello, i post for one friend of mine, thanks to use simple english

"Hi,

I write you from " France" because nobody here can say me what problem I have, so excuse me if I don't speak very well english.
I've got a big problem with my 930 of 1979.
Sometime my turbocharger have a big leak, and Nobody can say me what is the problem.
My turbocharger was controlled by specialist, They say me that it was ok.
I have disassembled the pump of oil behind the engine, everything is ok.
The leak comes when engine is really cold (lot of hours after having worked) never when engine is hot.

I have oil in cold air intake.

What do you think about ??

Thank for your answers."
Old 06-01-2010, 10:44 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
OFF THE BOOST PIPE NOW...
 
A930Rocket's Avatar
 
Join Date: Oct 2003
Location: Mount Pleasant, South Carolina
Posts: 7,161
Blown or bad seals in the turbo? What about the ball in the check valve located in
the oil pressure sending unit?
Old 06-01-2010, 12:07 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
full quack's Avatar
 
Join Date: Apr 2007
Location: Seattle-ish
Posts: 1,135
Send a message via Yahoo to full quack
What do you mean by a "leak"?
Is it dripping oil onto the ground?
Is it getting oil into the turbo up pipe & intercooler?
Into the air cleaner assembly?
Is the car smoking badly when it is leaking?
If it does smoke, does it clear up after a short time period?
Mark
Old 06-01-2010, 12:08 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
ibanezjs
 
ibanezjs's Avatar
 
Join Date: Aug 2008
Location: France
Posts: 54
Hello, thanks for him

As i know, there's some oil on the ground
Old 06-02-2010, 09:19 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Bibi
 
Join Date: Jan 2010
Location: France
Posts: 35
Hi, I'm the friend of Ibanezjiss
I manage to connect me, here
Thank for your answer
Old 06-02-2010, 09:27 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Bibi
 
Join Date: Jan 2010
Location: France
Posts: 35
Quote:
Originally Posted by A930Rocket View Post
Blown or bad seals in the turbo? What about the ball in the check valve located in
the oil pressure sending unit?
My turbocharger was controlled by turbocharger specialists, it is ok.
Every parts are new in turbocharger.
Seals are ok.
you talk about what valve ?

Thank you...
Old 06-02-2010, 09:33 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Bibi
 
Join Date: Jan 2010
Location: France
Posts: 35
Quote:
Originally Posted by full quack View Post
What do you mean by a "leak"?
Is it dripping oil onto the ground?
Is it getting oil into the turbo up pipe & intercooler?
Into the air cleaner assembly?
Is the car smoking badly when it is leaking?
If it does smoke, does it clear up after a short time period?
Mark
It's a big leak on the ground !!
Yes there is lot of oil in interccoler , there is equally in wastegate, oil exit by exhaust of wastegate.
No oil in air cleaner.
Yes my engine smoke when wastegate open.
I have this leak just when engine is cold, after about 12 hours. Never when it is hot.


Look:





Thank a lot
Old 06-02-2010, 09:51 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
full quack's Avatar
 
Join Date: Apr 2007
Location: Seattle-ish
Posts: 1,135
Send a message via Yahoo to full quack
Well, as far as I know, there is only one way oil gets through the turbo and into the up pipe and intercooler, and that is through bad turbo seals. Although your seals may be ok, but they could be being overwhelmed by shear volume of cold oil on start up, if your scavange pump is not keeping up with the flow, due to a slight restriction somewhere.
A restriction could be in the oil return lines, or gunk in your turbo oil catch can. Did your turbo oil catch can get smashed or bent up, thus causing a restriction, that when the oil is cold, it does not flow as well and simply backs up and overwhelms the turbo seals?
I would have to assume that the oil leak onto the ground is coming from the bottom joint at the turbo up pipe?
Mark
Old 06-03-2010, 07:05 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Bibi
 
Join Date: Jan 2010
Location: France
Posts: 35
Thank for you answer


I have already disassemble my oil line even the pump at the end of camshaft, and nothing of bad.

I forget to say you that I've not a big leak whenever I drive my 930, but always a small drop...except when I drive fast, in this case I've a big leak.



It's not my turbocharger but my leak is there:

Old 06-03-2010, 10:12 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
ibanezjs
 
ibanezjs's Avatar
 
Join Date: Aug 2008
Location: France
Posts: 54
Quote:
Originally Posted by The frenchi View Post
Thank for you answer


I have already disassemble my oil line even the pump at the end of camshaft, and nothing of bad.

I forget to say you that I've not a big leak whenever I drive my 930, but always a small drop...except when I drive fast, in this case I've a big leak.



It's not my turbocharger but my leak is there:

Hey

You speak very well English my dear!!
Old 06-03-2010, 11:33 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Registered User
 
full quack's Avatar
 
Join Date: Apr 2007
Location: Seattle-ish
Posts: 1,135
Send a message via Yahoo to full quack
In your last picture showing where the leak is, I see the braided stainless line going to the oil catch tank.

When was the braided stainless oil lines added?

It looks like the diameter of the braided line, could be too small to allow for the needed flow. A lot of oil goes through the turbo at full throttle.

Mark
Old 06-03-2010, 12:09 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Registered User
 
Join Date: Dec 2009
Posts: 7
Quote:
Originally Posted by The frenchi View Post
Thank for you answer


I have already disassemble my oil line even the pump at the end of camshaft, and nothing of bad.

I forget to say you that I've not a big leak whenever I drive my 930, but always a small drop...except when I drive fast, in this case I've a big leak.



It's not my turbocharger but my leak is there:


If I look at your oil return pipe, its an aftermarket pipe. Are you sure that the inside diameter is large enough to allow the oil to drain quickly.
When the engine is cold, the oil is thicker so it does not flow that easily.
Old 06-03-2010, 12:13 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)
Bibi
 
Join Date: Jan 2010
Location: France
Posts: 35
Hi,

excuse me I should not have post this pic, I write that it is not my turbocharger, everything is OEM on my porsche.I post this pic to show you where is my leak on my turbocharger.


I have a question? can I make a test by passing directly the oil from turbo to engine, without using the OEM oil line, to know if my problem comes from the turbocharger or oil line ?
Am I obliged to install a oil tank between turbocharger and engine, or is it possible directly, just for test ??

Thank you !!
Old 06-04-2010, 09:37 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #13 (permalink)
Registered User
 
full quack's Avatar
 
Join Date: Apr 2007
Location: Seattle-ish
Posts: 1,135
Send a message via Yahoo to full quack
Well if everything is stock on your 930, then I must only suspect that your turbo seals are bad. There really is only one other possibility that I can think of, and that is if the 8mm check ball has somehow been removed or is otherwise not controlling the flow of oil to the turbo.
Do a search on this forum for info on the oil line check ball, you should find more info that way.
Sorry I could not be of more help.
Mark
Old 06-04-2010, 09:45 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #14 (permalink)
Max Sluiter
 
Flieger's Avatar
 
Join Date: Mar 2006
Location: So Cal
Posts: 19,573
Garage
Here's a few to start:

check valve

Ball bearing for oil pressure switch

Oil Scavenging Problems

Oil in the Turbo charger

From this search: Pelican Parts Technical BBS - Search Results
__________________
911S
1971 chassis, 2.7RS spec MFI engine, suspension mods, lightened

Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
http://www.flickr.com/photos/max_911_fahrer/
Old 06-04-2010, 01:49 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #15 (permalink)
Bibi
 
Join Date: Jan 2010
Location: France
Posts: 35
Thank for your answer, I read all post, I'm going to control the ball in banjo this week end , I hope that it is the solution of my leak.

Thank you very much, I give you news immediately
Old 06-05-2010, 05:56 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #16 (permalink)
Manassas, VA
 
lucittm's Avatar
 
Join Date: Apr 2007
Posts: 1,211
Garage
I had the same problem. The line going back to the turbo oil scavenger pump had a pin hole causing a loss of vacuum in the oil line. When the engine was idling the oil pressure (to the turbo) was lower than when the engine is at higher RPM so not much oil leaked out. When I shut down the engine the pin hole allowed the oil to leak back into the turbo and most of it came out through the pin hole. The oil line from the turbo to the scavenging pump has a vacuum in it and it does not take much of a hole to break the vacuum.

Good Luck,
Mark
__________________
1991 964 Polar Silver Metallic Turbo Coupe
Old 06-05-2010, 04:47 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #17 (permalink)
Forced Induction Junkie
 
WERK I's Avatar
 
Join Date: Jan 2003
Location: Wisconsin
Posts: 3,291
Garage
This probably has nothing to do with you oil consumption, but what is that object in the picture circled in green? Optical illusion?

__________________
Dave
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 06-05-2010, 05:33 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #18 (permalink)
Bibi
 
Join Date: Jan 2010
Location: France
Posts: 35
Quote:
Originally Posted by lucittm View Post
I had the same problem. The line going back to the turbo oil scavenger pump had a pin hole causing a loss of vacuum in the oil line. When the engine was idling the oil pressure (to the turbo) was lower than when the engine is at higher RPM so not much oil leaked out. When I shut down the engine the pin hole allowed the oil to leak back into the turbo and most of it came out through the pin hole. The oil line from the turbo to the scavenging pump has a vacuum in it and it does not take much of a hole to break the vacuum.

Good Luck,
Mark
ok thank I will look...

Old 06-06-2010, 03:58 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #19 (permalink)
Bibi
 
Join Date: Jan 2010
Location: France
Posts: 35
Quote:
Originally Posted by WERK I View Post
This probably has nothing to do with you oil consumption, but what is that object in the picture circled in green? Optical illusion?

Optical illusion
Old 06-06-2010, 03:59 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #20 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 12:19 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.