Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

Oil Catch Can?

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Old 07-22-2004, 04:32 PM
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Oil Catch Can?

I read on a website that turbo-charged engines are prone to residue build-up in the intake tract, and that a oil catch can can help prevent this - resulting in longer turbo life.

My 04 WRX is the first turbo car I have owned, so sorry to sound like the newb that I am, but is there any validity to this at all?
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Old 07-22-2004, 05:10 PM
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Not sure about extending turbo life but if the oil makes it to your IC it will make it less efficient:

http://www.scoobymods.com/forums/showthread.php?t=3346

http://www.scoobymods.com/forums/showthread.php?t=2769
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Old 07-24-2004, 12:24 PM
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Oil Catchcan

I bought a Helix. It looks great! Nice polished stainless, but I cant find a space to install it. Take a look, there isn't much free space.
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Old 07-24-2004, 12:37 PM
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Peaty -

Is it a regular occurance for oil to get to your IC?
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Old 07-24-2004, 12:40 PM
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Peaty... has this since cure your oil in the IC problem? I have a little bit of oil in my metal IC lines, the ones that run parallel across the front of it. I was wondering if this is worth it and can the oil be very detrimental to my motor's health?
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Old 07-24-2004, 03:28 PM
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Keeping the intake charge free of oil contamination is worthwhile because it can make the intake charge more prone to detonation - at least that's my understanding. A small amount of oil vapor may not cause a problem unless your engine is tuned to the ragged edge of detonation. Some engine builders even specify ashless engine oil, again to ward off detonation.

Another benefit of a catch can would be to keep the inside of the intercooler clean and dry, allowing it to pass as much heat as it possibly can to the ambient air.

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Old 07-24-2004, 06:31 PM
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If an intercooler has been running for 25k miles without an oil catch can, can you flush the inside of it out somehow before adding a catch? Or will just adding the catch can allow the oil to vaporize and be trapped?
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Old 07-24-2004, 06:33 PM
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Originally Posted by BIG GUN
I bought a Helix. It looks great! Nice polished stainless, but I cant find a space to install it. Take a look, there isn't much free space.
Most installs are right behind the right headlight (the light to your right as you face the engine compartment); there's a flat horizontal piece of frame material next to the battery that has a convenient hole drilled in it...

That is, if you have a WRX; the model of car matters! Both of Peaty's links are to Forrester installs, but I've seen a WRX install of the Perrin can on Scoobymods as well.

Last edited by meilers; 07-24-2004 at 06:35 PM.
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