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after market oil/air separator om617?
larsalan Offline
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#1
after market oil/air separator om617?
It seems like it's pretty easy to find a replacement air filter to lose that giant airbox but, what all would be entailed in replacing the oil/air separator?

How much is this whole project going to cost? Where do I get a separator, do you just use one like the ones for pneumatic tools?

I can easily route the air out to the intake but how do I plumb the oil back to the pan? There's a drip tube at the bottom of the stock separator. Will I need to cut it to attach a new line? Or will any changes be reversible?
Rusted out beat down 300d turbo 82' -- RIP
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'
01-22-2011, 02:40 PM
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aaa Offline
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#2
RE: after market oil/air separator om617?
Grab one from a 240d. Along with its tube? Though I think I had some difficulty using a 240d tube (the turbo got in the way or something).
01-22-2011, 05:29 PM
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larsalan Offline
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#3
RE: after market oil/air separator om617?
240's is probably not an option. round here all we have in the junk yards are cavaliers and f-150s.

sorry, I'm not more informed on what's under the hood but it's all hidden away, I have no garage, and it's freezing out.

Thanks for the tips and more info would be great
Rusted out beat down 300d turbo 82' -- RIP
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'
01-22-2011, 05:37 PM
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aaa Offline
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#4
RE: after market oil/air separator om617?
Maybe some other model of car has an oil separator? And then you rig together a rubber hose or something for drainage.

That's the cheapest option. I'm pretty sure aftermarket separators are $50+.
01-22-2011, 05:58 PM
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ForcedInduction Offline
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#5
RE: after market oil/air separator om617?
(01-22-2011, 05:29 PM)aaa Wrote: Grab one from a 240d.

Thats not an oil separator, its primary job is to limit crankcase vacuum because of the throttle on 81+ 240Ds. Its called a Crankcase Depression Regulator on GM and VW engines.

The oil drain is to get rid of the natural oil condensation from contacting the large surface area. GM and VW do this by having the valve directly over the valvecover for the oil to drain down the inlet, but thats not practical on a 240D.

I built a separator from a Harbor Freight 1/2" airline water separator.

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01-23-2011, 12:16 PM
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larsalan Offline
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#6
RE: after market oil/air separator om617?
So, what do you do with the oil that drains from that separator? Does it just clamp around the tube coming up from the oil pan?
Rusted out beat down 300d turbo 82' -- RIP
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'
01-23-2011, 03:33 PM
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ForcedInduction Offline
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#7
RE: after market oil/air separator om617?
(01-23-2011, 03:33 PM)larsalan Wrote: So, what do you do with the oil that drains from that separator? Does it just clamp around the tube coming up from the oil pan?

For now it just drains into a container so I can monitor its effectiveness. No reason it can't drain back to the sump though.
(This post was last modified: 01-24-2011, 08:53 AM by ForcedInduction.)
01-24-2011, 08:53 AM
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