TDI cyclone separater internals - Defender Source
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Old August 25th, 2014, 01:08 PM
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TDI cyclone separater internals

does anyone have a picture if a cyclonic filter cut open so I can see how it functions? coming up with nothing on the net. I just replaced mine and will cut old one open if no one has one to show.

also, can someone explain why intercoolers dont have a drain cock to let out any collected oil? I dont get it
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Old August 25th, 2014, 01:10 PM
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Quote:
Originally Posted by Overlander View Post
also, can someone explain why intercoolers dont have a drain cock to let out any collected oil? I dont get it
Good point
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Old August 25th, 2014, 01:25 PM
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The oil should get pushed through. It should not collect.

Are you asking about a a pre-filter? There are many different brands with differing designs. Or do you mean the cylonic section of the air filter? Which TDI?
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Old August 25th, 2014, 01:26 PM
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Originally Posted by Overlander View Post
also, can someone explain why intercoolers dont have a drain cock to let out any collected oil? I dont get it
having oil in the intercooler is not normal.
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Old August 25th, 2014, 01:28 PM
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Originally Posted by sonoronos View Post
having oil in the intercooler is not normal.
Sure it is. It comes from the crankcase ventilation system.
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Old August 25th, 2014, 02:00 PM
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this is the part
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Old August 25th, 2014, 02:03 PM
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I seem to remember a few years back when I was looking at inter coolers, someone had one with a drain cock. I don't recall if they bought it like that or drilled and placed it there.
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Old August 25th, 2014, 02:17 PM
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if there isn't a good reason not to, I may just pull mine at some point and have my local alu welder put a bung on it that I can thread a drain cock on. like the fuel separator, seems like a good maintenance item to open it up from time to time. abnormal amount of oil would be a could indicator as well, since there isn't a good indicator other than oil loss to tell when it's time to pull the cyclonic breather out and soak it in kerosene, like so many LR forums recommend doing.
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Old August 25th, 2014, 04:15 PM
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I've changed my timing belt 3 times now. Each time I cleaned/drained the intercooler there was only about a tablespoon of oil to be collected from it. I'm thinking most oil passes on through as vapor. I did install a Mann Provent since my last belt change, in line with the factory cyclone, so we'll see on the oil volume next time.

Couple of things, when cleaning the intercooler I just use about a cup of gasoline, but I'm careful to let it dry as to be sure all vapors are gone.

I've gone to using Delo 400syn 5W-40 oil, and when I did my oil consumption increased dramatically from dino Delo 15W-40.
Dino consumption was about 1qt/5K miles whereas syn in about 1qt in 1500 miles. This consumption is what prompted me to install the Mann Provent in an attempt to reduce the consumption. The Provent does have a filter/condensation medium (replaceable) in it, whereas our standard cyclone, I'd bet, has nothing other than a swirl chamber in it.
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Old August 25th, 2014, 05:18 PM
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Quote:
Originally Posted by Red90 View Post
Sure it is. It comes from the crankcase ventilation system.
Well, of course, sure . Some oil is normal, to the point where there is a film inside the intercooler. But if it gets to the point where one has to install a petcock to drain oil from the intercooler, there is something seriously wrong.
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Old August 25th, 2014, 06:33 PM
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Allisport makes an aftermarket cyclone separater. I know Randy (TDIGuy) can get you one. I saw one on my friend's truck the other day. Its all aluminum and nice looking... not sure about the inside.

http://www.devon4x4.com/index.php?pa...mart&Itemid=14
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Old August 26th, 2014, 12:31 AM
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Quote:
Originally Posted by sonoronos View Post
Well, of course, sure . Some oil is normal, to the point where there is a film inside the intercooler. But if it gets to the point where one has to install a petcock to drain oil from the intercooler, there is something seriously wrong.
not to drain but to inspect!
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