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1-6-2-4-3-5's Avatar
 
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Turbo oil sump question

First post! Thanks to everyone for their input in this forum... it has helped me accomplish numerous projects on my 1988 930... air injection removal, valve adjustment, A/C removal... looking forward to many more projects as I slowly slide down the slippery slope!

Currently I am repairing a leaky oil supply line to the turbo. While I was determining how to get the line out from under the intake, I noticed that the turbo oil drain line to the sump has been crushed. The only cause I can see is contact from the stock exhaust. After searching this forum, I found a couple other photos of stock sumps that appear to have a similar issue. Are these oil lines deformed on purpose to provide extra clearance with the stock exhaust? That seems odd to me. It appears to be a severe restriction to oil flow through the turbo.

If the line needs to be replaced, does it make sense to cut the damaged portion of the line out and replace with a braided line?

Thanks for everyone's help!

Kirk


Old 10-29-2008, 04:12 AM
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I have mine apart at present and it has exactly the same dent as yours, so don't panic!
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1988 Carrera - 3.6 engine (with ITBs, COPs, MS3X) and a whole set of turbo body panels waiting in the attic.
Day job ... www.sspowdercoat.com.au
Memories: '68 912, '72 911T, '80 911SC, '84 911, '85 930, '86 930, '87 911

Last edited by billjam; 10-29-2008 at 04:43 AM.. Reason: spellink
Old 10-29-2008, 04:42 AM
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I have mine apart at present and it has exaclty the same dent as yours, so don't panic!

PS - welcome to the forum. I have learned so much from other members here. This is an invaluable resource.
Happy sliding
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Bill
1988 Carrera - 3.6 engine (with ITBs, COPs, MS3X) and a whole set of turbo body panels waiting in the attic.
Day job ... www.sspowdercoat.com.au
Memories: '68 912, '72 911T, '80 911SC, '84 911, '85 930, '86 930, '87 911
Old 10-29-2008, 04:45 AM
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Thanks, Billjam. If it's stock, then I'll leave it "as-is".

Kirk
Old 10-29-2008, 12:22 PM
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I gotta say, Negative Ghostrider. Looks more like a dent from the car backing into something. IIRC, mine doesn't have it.
Old 10-29-2008, 05:59 PM
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Doesn't look stock. Looks like a dent from 'outside sources' like reversing into/over something.

It would have some effect on oil flow too. Replace it with something better.

And welcome to the forum

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'85 930 - Black on Black
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Last edited by Helmsy; 10-29-2008 at 06:39 PM..
Old 10-29-2008, 06:05 PM
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Just thought you'd like to check out my dent ...

.

Strange that they are in same location, although your dent does look larger than mine.
There are no signs of mine being accident damage so I assumed it is meant to be there.
Obviously my engine is in pieces at present so I'm not sure how the exhaust system runs in the vicinity of this drain pipe, but the dent in my pipe doesn't look like accident damage and there are no marks anywhere on the exhaust pipe in this area which might have caused it.
Perhaps we should poll all Pelicans to see if there are more than two dents out there.
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Bill
1988 Carrera - 3.6 engine (with ITBs, COPs, MS3X) and a whole set of turbo body panels waiting in the attic.
Day job ... www.sspowdercoat.com.au
Memories: '68 912, '72 911T, '80 911SC, '84 911, '85 930, '86 930, '87 911
Old 10-30-2008, 06:42 AM
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Just curious, has anyone tried to use the factory tank with aftermarket headers? Is there just too much interference? I've got the small B&B tank on mine. But the factory tank has a vent and a filter or at least a way to drain it during oil changes.
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Old 10-30-2008, 06:54 AM
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Sandman

It depends on the header system. Some have different configurations that will not allow the tank to be used. I could not use them on mine (GSF) and I would imagine it is that way for most of them. I agree, it would be better to use the factory for numerous reasons but... oh well

Bryan
Old 10-30-2008, 07:04 AM
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Quote:
Originally Posted by x98boardwell View Post
It depends on the header system. Some have different configurations that will not allow the tank to be used. I could not use them on mine (GSF) and I would imagine it is that way for most of them. I agree, it would be better to use the factory for numerous reasons but... oh well

Bryan
Yeah...I had B&Bs, and am now running OBX...both came with the small tank. Maybe for grins I'll bust out the factory tank and see just how far off it is. Holcombe (Mode) makes a small tank that at least has a vent/overflow. It's intended to drain into the passenger side chain cover.
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back in the saddle: '95 993 - just another black C2
*SOLD*: '87 930 GP White - heroin would have been a cheaper addiction...
"Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP)
Old 10-30-2008, 07:09 AM
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Strangely enough mine has the same dent. Since I noticed it I am not driving . Waiting for replacement to arrive .
I think oil flow restriction will affect performance and longevity of an engine eventually, so why test the limits this way.
Here is how mine looks.
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Old 10-30-2008, 07:27 AM
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These pipes are the exact height of the infamous parking lot concrete stop. Here is a picture of mine to show that it is not a conspiracy:


Thanks,
Mark
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Old 10-30-2008, 12:57 PM
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Sand man

I took a picture of my drip tank. I just added another AN fitting on the other side and now am venting this to my chain cover. Have a looksie...



Just for the record, this fitting is loose. This is not how the line will be entering my chain cover.




Bryan
Old 10-30-2008, 05:30 PM
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Quote:
Originally Posted by x98boardwell View Post
I took a picture of my drip tank. I just added another AN fitting on the other side and now am venting this to my chain cover. Have a looksie...



Just for the record, this fitting is loose. This is not how the line will be entering my chain cover.




Bryan
What is the reason for doing this? The oil scavenge pump sucks it out of tank!!
Old 10-30-2008, 07:07 PM
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Options

My oil scavenge pump has been lagging behind the oil coming from my turbo. I am leaning towards that as the cause for my turbo seal failure.

I added this line as an additional gravity drain in case my scavenge does not keep up. With the vent gone from the original tank it changes the system slightly and I have been unable to pinpoint the problem. I rebuilt my scavenge (seals only) which did not fix the problem. If I had a good "donor" pump I could tell for sure, but its not that easy to find meaning borrow. This should help for that additional oil that has no home except out my exhaust. Not an option!!

This is just a safety precaution.

Bryan
Old 10-30-2008, 07:35 PM
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There is a good used one on ebay now 4 days left $49 now 911 parts - Assy
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Old 10-30-2008, 09:43 PM
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Could the damaged section of hard pipe be cut out and replaced with a braided line? I'd like to eliminate the possibility of any future dents.

I'm wondering if the dent in mine is what caused the leak in my turbo oil supply line....
Old 10-31-2008, 02:20 AM
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Quote:
Originally Posted by 1-6-2-4-3-5 View Post
Could the damaged section of hard pipe be cut out and replaced with a braided line? I'd like to eliminate the possibility of any future dents.

I'm wondering if the dent in mine is what caused the leak in my turbo oil supply line....
Here is my solution.............replacement


an old one I'll keep for table lamp or smthg else..........
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86 930 Kokeln IC and Turbo; Zork;SC cams,Port&Polished
68 911T/R "Special wish program Nr.184*** car"
67 911 2.0L, 901, Webbers,Matching #'s
68 912 original to the bone
Old 11-04-2008, 01:51 PM
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I'd say if you can weld in a new section of pipe youself to save money or find a used one, you would be better off. Just my .02

Quote:
Originally Posted by 1-6-2-4-3-5 View Post
Could the damaged section of hard pipe be cut out and replaced with a braided line? I'd like to eliminate the possibility of any future dents.

I'm wondering if the dent in mine is what caused the leak in my turbo oil supply line....
Old 11-04-2008, 05:02 PM
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I've got one available....along with a crap load of other parts. Whenever I look at the pile I get queasy.
PM me.
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88' blk/blk 930: Haltech EFI, Twin Plug, Pauter Rods, Nascar Bearings, custom crank work, dowel pinned case, ported manifold and heads, Kokeln I/C, SC Cams, Turbonetics ball bearing 62-1, BB headers, RARLYL8 Zork, additional 993 oil filter, plx/inyourface gage, RS style coilover, Fikse FM10-17 wheels, TIAL 46mm 1 bar. (where the heck did all my money go?)
Old 11-04-2008, 05:24 PM
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