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Mike_Lettrich's Avatar
 
Join Date: Nov 2006
Location: Pittsburgh, PA
Posts: 98
Check valve for turbocharger oil supply?

Is anyone running a check valve on their oil supply line to the turbocharger to keep oil out of the turbo's center section when the car is not running?

Here is the problem I am trying to correct: I am running a BAE turbo setup on my SC. It runs well, but after shutting down oil continues to drip through the turbo's center section into the turbos' catch tank. If the car sits for a long time (like over a week), that dripping oil more or less fills up the catch tank. (Incidentally, BAE systems did not use a catch tank in their stock configuration. I was having some oil return problems like Pat Keefe documented in his threads with his BAE setup, so I fabricated a 930 style catch tank and use an electric oil pump to scavenge the oil. Works very well, BTW).

I think that some type of check valve on the oil supply line that would open when the oil system is pressurized but closed when it is not would be helpful to prevent this.

Is anyone running some type of check valve setup, and if so, could you provide me with a source? Thanks!

Mike
Old 09-04-2008, 06:56 AM
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I know nothing about BAE turbos, but this thread might be useful:
http://forums.pelicanparts.com/porsche-911-technical-forum/208416-930-oil-drip-tank-fills-when-engine-off-causes-smoking.html#post1781031
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Old 09-04-2008, 07:01 AM
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Seems you need to resort to the stock 930 turbo oil supply with the ball.
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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 09-04-2008, 09:25 AM
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Location: Brandon, FL
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Sounds like I have this problem. No ball. I replaced the pressure switch while the engine was out and I didn't see a ball bearing. Mine also smokes after sitting for a few days.
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Old 09-04-2008, 09:28 AM
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You have to get the ball out with a magnet, it's not easy to see.
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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 09-04-2008, 09:33 AM
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I have a check valve in the top of my turbo, I obtained it from Tial. The purpose for mine is to be run on a ball-bearing turbo though.
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Old 09-05-2008, 12:04 PM
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