Oil Catch Can, Eliminate that knock!

Are the PCV valves in the diagram backwards? The threaded portion of the valve is in the block, no?

SM-G781V ?

 

Here is another one. Flow is always engine to intake.

 

Thanks, that makes more sense.

SM-G781V ?

 

Frankenbuilt this while the car was down for HV battery reconditioning this past week. It’s based on the larger OCC Victorine posted about above and is a replacement to the smaller Mishimoto version that was previously installed.

This iteration seeks to address 2 issues. Firstly, I reside in SW Ontario, Canada where the winter produces large volumes of condensed shmoo. Secondly, on reading about flow resistance to some of these setups, the goal was to reduce resistance to airflow by increasing the filtered surface area. On cleaning the previous model last summer, I found the disc filter to be clogged enough to restrict cleaning fluids from passing and it’s cleaned on a regular basis.

Minor mods were required to enlarge the diameter to allow for the threaded pipe nipple and create a hole in the baffle to accommodate the same. If I remember, I’ll update this winter to see how it goes.

I admittedly have no way at the moment to test for a performance increase due to less flow restriction. If the unit behaves, I’m just going to put it down to a feel good win. A proper test would have been to document pressures before and after modding.

When installing it, the clearances were very tight and I fabricated the brackets from steel stock obtained from Crappy Tire. I had to swap the straight pipe fitting from the drain to the outlet and bend the elbow towards 45 degrees. All threaded fittings were sealed with a high temperature thread sealant.

It’s not light so I added a second support bracket. I admit I don’t totally love the location, I’d rather have it low, but I need accessibility to drain it almost weekly in the winter.






iPad ?

 

Last Sunday I installed my OCC under the snorkel, I drilled 2 x 3mm holes and used 2 self tapping screws and at the same time did some intake cleaning with a collection of steel brushes and an aluminium pipe as extender.

It is accessible from above once removed the snorkel, and it' s almost invisible, but the occ hoses are very close to the ac hose and I'm worried about long term wear if they rub during accelleration and brake.

Also I'm concerned that some oil might pool in the hoses since the occ is about the same height of the holes it taps from, so I'm considering to relocate it down on the lower beam as Mendel did.

 

The last thing you want is your pcv hoses or catch can filling up enough to stop pcv flow. At that point you start creating oil leaks due to crankcase pressure, usually starting at the timing chain cover.

Keeping the engine from burning oil is the preferred way to minimize piston ring blowby which moves more liquids through the pcv system.

Newer Toyotas have built in catch cans which drain liquids back into the crankcase.

 

Which ones? I know the Gen 3 has a rudimentary labyrinth behind the PCV valve, but not very effective.


^ Did you consider just cutting the original PCV hose, per @danlatu describes, on page one? It's a perfect fit at the intake manifold (of course), much less bulky with it's original spring clip, and serves as an elbow, can be turned downwards and out of the way very compactly.

Note too: airplane clips such as those shown are hard on plastic, create point loads. Also, clips of any sort or not needed, when hoses are pushed onto properly sized barb connectors.


^ The only clips I use are the two original spring clips, on the ends of the cut-in-half, stock PCV hose. If you're concerned about compromising that hose, say if you want to return the system to stock before selling, replacement PCV hose only costs about $10~15:

 

The gen5 engines like the 2.0L and 2.5L with dual injection and electric variable intake timing.

 

Someone on here did a mod on their Gen 3 that routes the pcv to the crankcase.

Not sure how it worked out for him but if Toyota did it to their Gen 5 then it must work.

 

PCV is coming from the crankcase; not sure how that’d work. Maybe just the collected liquid?