Oil catch can.

I bought the $38 version off of Amazon for our old 2010 several years ago.

It did it’s job.

Just use fuel line instead of the braided hose they send with it and you’ll be fine.

 

There is no "right" one. Also, some manufacturers supply one as part of a kit, complete with brackets, hoses, nuts/bolts and instructions. But there doesn't seem to such a kit for the Prius.

One manufacturer that does make kits is Moroso, and while they don't make a Prius kit, they do make a sweet oil catch can. It's getting pricey though. FWIW, there's some that are double the Moroso price. I went with the Moroso can, very happy with it. I mounted it below the intake manifold, and drain it when doing oil changes.

Google "moroso air-oil separator 85474 universal 3/8".



The 3/8" is the hose diameter you'll need, and again fuel line is best, spec SAE-30R7 (or SAE-30R6). You'll also need 3/8" hose splices, if you tap into the existing PCV hose (what most are doing). PEX or Hose Barb style brass splices will work, but the PEX are a lot easier to work with.

The barb style work great, but oh Jesus if you want to pull them off. Since that's all that's readilly available at my walking distance hardware store, I get them, but mount them in a drill press and slightly knock the sharp edge off the barbs with a file. Not too much, just to blunt them.

PEX style splice:



And barb style:



Hose clamps are cheap insurance that everything is tight; I use them but not sure how critical they are, the connections are very tight even without them.

Good thread:

Oil Catch Can, Eliminate that knock! | PriusChat

 

That looks nicccceee! What's the cost?????

 

Around $143 (USD). Very pretty, and pretty effective as well:

Moroso 85474: Air-Oil Separator Universal | JEGS

There are better, this comparison test against RX performance, the RX catches a fair bit more. Costs even more though:

 

OOUUCCHHHH!!!! That's $100 too much, for me.
It does look nice though.

 

New Prius owner

just bought a new 2020 Prius Prime. Do not really want to mess with a brand new car but there is a lot of discussion here about the benefits of installing an OCC. Any thoughts?

thanks

 

Here's a pic of my install on our 2019 Prime :

What did you do to your Prime today?

I put our catch can setup in at 21k miles.

It is catching spooge that would otherwise go further down the process.

 

Look like nice cans, good quality. I am gathering parts to install my can. My son got quality hoses for me and they are 10mm ID in Europe with 19mm OD. I am trying to find out the manifold hose ID as I want to buy a converter joint to fix to the 10mm. Don’t want to cut the existing PCV to manifold hose as most people seem to do. Does anyone know the manifold hose ID in mm please, think I’ve seen the OD expressed as 3/4 imperial ?

 

You can buy an oem replacement for dirt cheap on eBay just in case you want to let the carbon clog back into the engine again. I have a replacement on hand just in case stuff happens.

 

Yeah cutting the original hosea at the middle, pushing on 3/8” barb (or Pex) splicers and then carrying on with 3/8” ID fuel line is hands-down simple; I wouldn’t mess with success. One thing: at the manifold end if you push on the cut end (of orig hose) it does a sharp 90 degree turn, right where you need it it. Anything sticking out further starts butting into adjacent plumbing and gizmos.

Hose clamps are NOT needed with properly sized barb connectors btw.