How To: Cheap Oil Catch Can

Forum rules
All advice given here is advice from persons using these forums,these opinions are not of the websites owners,and must be used at own discretion.
nwdatsuns does not verify the accuracy of given advice

This section is for informational How to's
Including, how to on datsuns, general technical, fabrication, electrical etc. Not limited to those, but for real information.
The how to make eggs and sammiches should go under General Discussion, as those topics aren't indexed for searches.
User avatar
Laecaon
Site Admin
Posts: 3967
Joined: Wed Jun 26, 2013 7:21 pm
Cars: '71 510 Wagon, 02 BMW 325i Wagon
Location: PDX, West side.

How To: Cheap Oil Catch Can

Postby Laecaon » Sun Apr 12, 2015 4:33 pm

About to try some stuff on the BMW, so I decided it was a good idea to install an oil catch can, especially since I have deleted the stock PCV system. It also catches the oil before it goes back into your intake, which in turn will help keep your intake and valves a bit cleaner.

There are a ton of catch cans on the market, ranging from cheap to quite spendy. There is no reason for this, as its a really simple device. So after doing some research, I decided to use a air compressor water/oil separator.


So its a pretty simple mod. I will keep it brief with how I hooked it up to the car as its more or less specific to the BMW.

Your list of supplies will vary depending on application.
First off, the catch can itself: http://www.homedepot.com/p/Husky-3-8-in ... 5yc1vZc9n8
Then you will need any fittings that are required for your application. FYI, the catch can/filter takes 3/8 NPT or MIP.
And finally any hoses that go with the fittings you got. I used 3/8" heater hose.


Here is the filter:
Image

Step one, remove the stickers:
Image

Step two, Remove the twist valve thing:
Image

Step three, epoxy or JB weld the valve shut. The valve works great with pressure from an air compressor, but not so much with vacuum from the manifold.
Image

Step four, while the epoxy is drying, make your bracket. I happened to have an old metal shelf so I just needed to put a hole in it to hang the filter.
Image

And Paint:
Image

Step five, install your fittings, I ended up using a different fitting than shown.
Image

Step six, install
Image


Finally, the rest of the install is just routing hoses, and connecting to the engine. One side connects to the crankcase vent whether that is the valve cover or crank case itself, The BMW only had a Valve Cover vent, I know the L series has 2. The other side of the filter connects to the intake manifold.


I will update as I drive the car. Currently, my thinking is the filter may need a bit of modification to further help the separation of oil and air.
User avatar
DRIVEN
Posts: 5589
Joined: Thu Jun 27, 2013 7:05 pm
Location: I've been everywhere

Re: How To: Cheap Oil Catch Can

Postby DRIVEN » Mon Apr 13, 2015 5:06 am

Looks good. And should work well too. If I might make a suggestion, you could use an EFI style hose clamp and it would appear almost factory.
Image
When the only tool you have is a hammer every problem starts to look like a hippy.
User avatar
izzo
Site Admin
Posts: 5647
Joined: Wed Jun 26, 2013 6:32 pm
Title: Save a pimp, Rent a bitch.
Cars: Too many
Location: Astoria, OR
Contact:

Re: How To: Cheap Oil Catch Can

Postby izzo » Tue Apr 14, 2015 8:16 pm

Ha! Dude, that is awesome. Small yet works and can be tucked just about anywhere. Giving rep yo!
8========D ~~~ ( o Y o )
jayden71: titty ponk

devilsbullet wrote: 1400 obo. and best offer doesn't mean 300 bucks you cheap bastards

Return to “How To”

Who is online

Users browsing this forum: No registered users and 2 guests