Delica Canada | Mitsubishi Van Club

Hey Fellas
Here is my question.
I have a K&N apollo filter installed, easy swap over for a cleanable filter and lots of space gained.
I noticed that the way the line enters the K&N any oil coming from the crankcase will drip onto the filter instead of down towards the turbo, sure enough, lots of oil collecting after a few months of driving.

So, Thinking of putting a catch can on the line from the crank case. First, thoughts on that?
Second, do I need to route the line after the catch can back to the K&N or can I dead end it with on of those little crank case filters? AKA do I need the negative pressure from the turbo pulling from the crank case or is atmosphere pressure good enough for that?

I know its probably been covered before, but a lot of the posts on it had me lost (don't have much technical knowledge)

Cheers

supa_fox wrote:Hey Fellas
Here is my question.

Second, do I need to route the line after the catch can back to the K&N or can I dead end it with on of those little crank case filters? AKA do I need the negative pressure from the turbo pulling from the crank case or is atmosphere pressure good enough for that?

You do not need the negative pressure from the turbo to pull the gases out. Prior to more stringent pollution control all vehicles just vented to atmosphere (with or without a filter). Venting to atmosphere is just not as green.

psilosin wrote: You do not need the negative pressure from the turbo to pull the gases out. Prior to more stringent pollution control all vehicles just vented to atmosphere (with or without a filter). Venting to atmosphere is just not as green.

X2

The vent pipe exists to relieve pressure from inside the crankcase, it is on almost every vehicle. Old motorcycles had the crankcase breather pointing at the rear chain to keep it lubed! Just put in a catch can, and a vent filter on the can and call it a day.

I also have an Apollo and what I first did was buy a good stainless catch can and mounted K&N breather on its open end. But I had a lot of oil NOT being caught. Instead it was sputtering & dripping from breather and all over everything. I tried a few solutions.

To make a long story short, I eventually piped the catch can's breather through the center of the lid of a small plastic jar, drilled smaller holes in the lid around that hole and now the breather sputters into the jar; so I have a "catch jar" for my catch can. One day I'll have to do an engine clean up for all the residual oil missed by the "catch can".

Not great pics but you get the idea. The can is velcroed to the battery for easy access & removal. Notice that even with this there's still signs of oil outside the little breather holes. Obviously dealing with very hot, fine, pressurized mist.

From here...

To here...


http://www.saikoumichi.com/951_page.htm

Also remember that 95% of things sold as oil catch cans are pretty much useless out of the box regardless the price. That is likely your case Drumster if you still have appreciable amounts of oil coming out the the 'out' pipe. Most of them are exactly what they say...an empty can with an 'in' and an 'out' hose. There needs to be baffling to act as an agitant inside to strip the oil from the air as it passes through. Easiest fix for the generic useless catch can that at least has a design where you can access the interior of the can is to stuff the inside with a few stainless steel pot scrubbers...will let the oil condense without slowing airflow too much.

I had a useless but pretty looking Greddy catch can on my Surf that did nothing. The ProVent 200 catch can on my L400 works amazing. Below is a pic reposted from my ProVent 200 install thread. Line to catch can is BLACK with oil...line out of catch can is completely CLEAN.

A catch can on a catch can... well if one works 2 must be better ;)
I was wondering how that would work, the inlet/outlet are always side by side.
what about taking a foot or two of tubing and running it uphill from the catch can to the breather filter? oil would spurt into the breather tube and maybe run back down to the catch can? 50 cent fix?
I dont want to spend a lot on this one, hoping to get one of the $40 catch cans off of ebay maybe... any cheap recommendations?

thanks fellas!