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craigerz
 
Join Date: Feb 2008
Location: 15 miles no. of Salt Lake City
Posts: 550
turbo oil leak

I just bought an "82 ROW 930 from a gentleman that had not run the cart for 5 years. I noticed on the PPE that the turbo was quite oil soaked and caked on the lower 1/2 of the compressor housing and there was also a slight oil drip just sitting. It doesn't smoke out of the exhaust since it has been running, but only about 5 miles have accumulated so far... The price of the car reflected that and a couple other issues, but I'm wondering 1) how long before it really starts to smoke, and if it happens gradually or quickly, I know this may be hard to answer... 2) I have the mechanical prowess and tools to possibly rebuild it myself, any idea where a rebuild kit can be obtained? 3) If a kit isn't available, who and how much to get it rebuilt? 4) Or should I just pop for a k-27, where and how much, any chance of finding a good used one? The car is stock, right down to the ROW exhaust system... Many thanks!!!
Old 03-01-2008, 01:29 PM
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My .02 cents

If I'm not mistaken, the leak could be from either the oil feed line seal on top of the turbo or the oil return line seal on the bottom going to the drip-tank.

If that is the case, then the seals between the compressor housing to the oil filled area are fine... hence no smoke. It would seem to me that if the turbo was leaking internally then you would be seeing smoke on boost and dealing with a more severe problem and a possible new turbo purchase. You can also take off your turbo and check the tolerances on the shaft to see if it is going bad that way as well. The K27S is a great option from Ultimate Motorworks but a cost that you may be able to put elsewhere if the car needs some TLC.

You may be alright by just purchasing the $2 seals from our host. Also, you may try and tighten the bolts to ensure they are not loose.

Hope this helps. Best of luck!

Bryan
Old 03-01-2008, 01:44 PM
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Don't quote me here, but if it's not smoking at startup, and on boost, the seals inside the turbo are probably ok. I just had my turbo seals go out on me, it would smoke at startup after sitting overnight. At full boost it would smoke as well.
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Old 03-01-2008, 02:49 PM
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I would pull the TC and check it out. Majestic Turbo in Waco is a good rebuilder should you need that done.
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Big Gun: 1988 928S4 Twin Turbo, 5-SPD/LSD 572 RWHP, 579 RW ft-lbs, 12 psig manifold pressure. Stock Internals, 93 octane.
Little Gun: 1981 928 Competition Package Twin Turbo, 375 RWHP, 415 RW ft-lbs, 10psig manifold pressure. Nikasil Block, JE2618 Pistons, 93 octane.
Old 03-01-2008, 04:46 PM
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The turbo oil feed line should be pouring by now if it's original. Usually where the rubber hose is crimped onto the metal line is where they start to leak...
Congrats on the car
Old 03-01-2008, 04:56 PM
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Mine leaked!
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

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Old 03-03-2008, 10:59 AM
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Quote:
Originally Posted by NathanUK View Post
Mine leaked!

How much fun was that to change Nathan??
Old 03-03-2008, 04:29 PM
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craigerz
 
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Porsche Crest Thanks

I appreciate all you help and insite, as soon as I get it figured out, Ill let you know whats up.... Craig
Old 03-05-2008, 10:30 AM
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Quote:
Originally Posted by rsrmike View Post
How much fun was that to change Nathan??
Well, the car is still in pieces. Does that answer your question?
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 03-06-2008, 07:58 AM
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I understand...
Old 03-06-2008, 11:01 AM
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Check the axial and radial play on the unit while you have it out. KKK is generally a very robust turbo, built like a tank.
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Kuhn Performance Technologies, LLC
Big Gun: 1988 928S4 Twin Turbo, 5-SPD/LSD 572 RWHP, 579 RW ft-lbs, 12 psig manifold pressure. Stock Internals, 93 octane.
Little Gun: 1981 928 Competition Package Twin Turbo, 375 RWHP, 415 RW ft-lbs, 10psig manifold pressure. Nikasil Block, JE2618 Pistons, 93 octane.
Old 03-06-2008, 05:20 PM
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Rebuilding yourself could be tricky. The balance of rotating parts is critical and if you don't take extreme care when disassembling the wheels and shafts to make sure they align back together in the same orientation you will upset the balance.
Turbo manufacturers spin balance assembled units at the factory to fall within tight specs......at 100,000rpm and a fraction of a gram out of balance means you have built a grenade and not a turbo.
Might be in your interest to let pros with equipment do it.....at least ask if they balance as part of it. Otherwise buy new!
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Old 03-07-2008, 10:11 PM
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craigerz
 
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thank you very much on that answer, Craig
Old 03-08-2008, 12:59 AM
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