Oil catch can options

[HACK BLOCK]

seems like every year I'm having to clean out my throttle body because of build-up so I wanna know what's a decent catch can to get? I see some around $20 that have the same design as more expensive ones. not sure which design is good or not. also would like to know exactly where to hook it up to. when I was younger I had a old Honda that had separate pcv for the head and block so I'm not sure if I would need a 2 port or a 3 port for our engines

 

[wsteele]

I bought a Moroso unit off Amazon (one of the expensive ones). Having said that, as long as it has an air/oil separator as part of the design (a kind of metal pot scrubbing material inline with the air flow to catch the oil and separate it from the air), it should be fine. It isn't a high tech thing.

The install is super simple. You are just inserting the catch can inline between the PCV and the Intake Manifold and mounting in a convenient place to get at it to drain it.

 

[donjetman]

seems like every year I'm having to clean out my throttle body because of build-up so I wanna know what's a decent catch can to get?

Here's what I installed 2+ yrs ago
https://www.tahoeyukonforum.com/thr...ge-engine-code-lmg.123601/page-2#post-1526129

 

[trailblazer]

Don’t forget to check your engine oil level after emptying the can. I suppose you could reuse the collected oil after letting the water settle out. I check mint every couple weeks in the winter and I get a ridiculous amount of oil and water collected.

 

[Just Fishing]

I added a cheap one that i could remove the top and bottom of the canister.
From there i added a tube going to the bottom that connects to the valve cover side, stainless steel scrubbers, and since i had some aluminum sheet metal and the motivation, a few baffles.
at the top i added a little mesh screen to prevent anything weird from getting sucked into the intake.

I did not get pictures of my setup when i was building it, mostly because when i was fitting it i ended up just leaving it installed... lol

at the bottom i drilled and tapped 1/4in npt and added a drain ****.
So far i have drained some moisture, and a wee bit of oil from it.
I do however have the older valve covers that have the TSB about oil burning.


drain **** is awesome, the first one i did for my vette was not nearly as complex.
It just has ss steel scrubbers, the tube, and some aluminum mesh screen in there.

The mesh screen just happens to be something i have a roll of thanks to a garage sale a few years ago.
pretty much it's the stuff that you would install over your house gutters to help keep leaves and trash out.

the aluminum sheet i used, was a left over from a heat shield i made for my lawn tractor.
Otherwise, you should be fine to just use the stainless steel scrubbing pads.

Also when i had my intake and heads off last month, I thought everything looked pretty good.
I didn't see signs of any oil burning, however storing my intake on it's side resulted in a ton of oil pouring out.
Possible there is a provision inside to catch oil, but i have noidea.
My engine is at about 180k, so i assume a lifetime of oil was stored there.

 

[HACK BLOCK]

Don’t forget to check your engine oil level after emptying the can. I suppose you could reuse the collected oil after letting the water settle out. I check mint every couple weeks in the winter and I get a ridiculous amount of oil and water collected.

with all that moisture I wouldn't bother using it back

 

[HACK BLOCK]

what diameter hoes would I need to connect to the pcv? just picked up one on Craigslist but it comes with 1/2 hoses

 

[wsteele]

3/8" fuel supply hose will slide right on your PCV and Manifold fittings.

 

[HACK BLOCK]

another question I had was I see that the pcv runs to the middle of the intake manifold but the reason I picked up the catch can was to try and help out the build up I keep getting on my throttle body. is there another line that I could tap into?

 

[donjetman]

It will.

The path is: from the valve cover, thru the catch can, to the intake manifold, then into the combustion chamber.

 

[HACK BLOCK]

It will.

The path is: from the valve cover, thru the catch can, to the intake manifold and thru the throttle body, then into the combustion chamber.

that doesn't sound right cause I see the line goes from the pcv to the intake manifold which is after the throttle body

 

[HACK BLOCK]

what's the line that goes to the intake tube?

 

[wsteele]

another question I had was I see that the pcv runs to the middle of the intake manifold but the reason I picked up the catch can was to try and help out the build up I keep getting on my throttle body. is there another line that I could tap into?

There is another hose on the passengers side valve cover. That nipple is up near the filler tube, but that is the fresh air supply to the crankcase (air flowing from the induction side to the crankcase).

 

[HACK BLOCK]

I see that is attached to the intake so isn't it under vacuum? and also I'm pretty sure that's the cause for the oil on

my throttle body

 

[HACK BLOCK]

oh and I broke that breather hose that goes into the intake tube. idk if I can use a T fitting and join it with the pcv going into the catch can then have it exit to the fitting after the throttle body

 

[wsteele]

I didn't think the fresh air line that runs from the TB to the passenger side valve cover was under relative vacuum because it is connected outside the TB.

My understanding of how the PCV works is fresh (filtered) air is supplied through that fresh air hose (Passenger side valve cover nipple to TB), flows down into the crankcase and then back up through the PCV valve on the drivers side valve cover, to the intake manifold (top center). The intake manifold has a higher relative vacuum, so that is what crates the flow, scavenging all the nasty vapors in the crankcase, sending it back into the combustion side.

 

[donjetman]

that doesn't sound right cause I see the line goes from the pcv to the intake manifold which is after the throttle body

View attachment 269543

 

[HACK BLOCK]

I didn't think the fresh air line that runs from the TB to the passenger side valve cover was under relative vacuum because it is connected outside the TB.

My understanding of how the PCV works is fresh (filtered) air is supplied through that fresh air hose (Passenger side valve cover nipple to TB), flows down into the crankcase and then back up through the PCV valve on the drivers side valve cover, to the intake manifold (top center). The intake manifold has a higher relative vacuum, so that is what crates the flow, scavenging all the nasty vapors in the crankcase, sending it back into the combustion side.

well it's connected to the intake tube before the throttle body so it's definitely under vacuum but I can feel it sucking air into the engine through that line

 

[donjetman]

Your correct, it doesn't go thru the TB.

The crud your getting on the TB is dirt/dust in the atmosphere that gets by the air filter.

An air filter is a compromise. If it does too good a job of filtering the incoming air it is too restrictive and doesn't allow enogh air into the engine thus robbing it of efficiency/hp. If it doesn't do a good enough job of filtering the crud out of the incoming air, damage to the engine will result.

 

[HACK BLOCK]

Your correct, it doesn't go thru the TB.

The crud your getting on the TB is dirt/dust in the atmosphere that gets by the air filter.

An air filter is a compromise. If it does too good a job of filtering the incoming air it is too restrictive and doesn't allow enogh air into the engine thus robbing it of efficiency/hp. If it doesn't do a good enough job of filtering the crud out of the incoming air, damage to the engine will result.

so how would you explain the oil then?