pcv catch can vs. breather

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Aug 4, 2009 | 09:32 AM

#21

mt_goat

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Joined: Nov 2002

Posts: 10,666

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From: Oklahoma State

Quote:

Originally Posted by 95 Yoda 4runner

My 4runner blows a lot of oil thru the PCV and back into the combustion chamber. I'm wanting to do this mod and was wondering what you'd do with the oil that gets caught in the can? Put it back in the motor if it looks clean? I go thru about a quart of oil every 800 miles i think. It's costly and annoying having to constantly check my oil level and buy oil to refill my engine back to a full level.

My BMW has a factory catch can that routes the oil back into the dip stick tube. Personally I probably wouldn't put it back in, especially if it looked dark and nasty as I suspect it would.

Aug 4, 2009 | 09:37 AM

#22

mt_goat

Contributing Member

Joined: Nov 2002

Posts: 10,666

Likes: 5

From: Oklahoma State

Quote:

Originally Posted by apalmer1

what i would do if you want to avoid making a catch can is to rout it into the airbox before the filter. the filter can stop the crud from going into the intake again and it will still provide some vacuum though not as much as in the intake piping itself.

It has been reported on the 95.5-2004 forum that the air box has no vacuum:

https://www.yotatech.com/forums/f2/d...othing-186443/

Aug 4, 2009 | 09:57 AM

#23

95 Yoda 4runner

Registered User

Joined: Jun 2009

Posts: 33

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From: San Diego, Ca

If the oil looks dirty i'll toss it if it's clean i'll re-use it.

Also, why would you want to re-route the pcv hose into your air box? Regardless of whether or not an air box provides vacumm who'd want motor oil clogging up their air filter resulting in it not being able to breath.