Oil catch can options

[HACK BLOCK]

where are you guys mounting your catch cans? mine came with no bracket so gotta figure something out

 

[iamdub]

where are you guys mounting your catch cans? mine came with no bracket so gotta figure something out

You can see mine in my sig pic. I backed out one of the alternator bolts, slipped it through the hole in the catch can bracket, then reinstalled it. The can isn't in the way of working on anything else, is easy to reach from the side and has plenty of room underneath the hold a cup to catch the drainage.

The one I put on my brother's truck was one from Amazon and it didn't have a bracket, either. I made a simple one out of a piece of 1.25"x.125" flat bar to mount in the same way as the one on my Tahoe.

 

[HACK BLOCK]

do you guys think I should add a check valve to the breather hose side?

 

[89Suburban]

do you guys think I should add a check valve to the breather hose side?

No

 

[HACK BLOCK]

looks good. probably gonna go tomorrow and pick up some 1/2 and 3/8 heater hose at autozone tomorrow and a couple of barbs. the catch can I have has 1/2 fittings on it

 

[wsteele]

looks good. probably gonna go tomorrow and pick up some 1/2 and 3/8 heater hose at autozone tomorrow and a couple of barbs. the catch can I have has 1/2 fittings on it

Generally speaking, I think best practices would say avoid using heater hose, in applications that involve hydrocarbons.

Another thing to consider is this application is under a relative vacuum, so a thick walled fuel supply style of hose may help in assuring the line doesn’t collapse under vacuum, especially as it ages. The runs to and from the catch can will probably end up being pretty long.

The OEM line that runs between the PCV and the intake manifold is plastic hardline for most of its length, with only the ends being rubber hose to make the junctions (very short runs).

If it were me, I would use a nice sturdy 3/8 fuel supply hose and update the fittings on the catch can to support that hose.

Having said all that, as long as you keep an eye on the hose and make sure it isn’t collapsing on you under vacuum, the rest might qualify as dancing on the head of a pin stuff.

Best of luck, whatever direction you choose.

 

[gooffeyguy]

My catch can came with 3/8 and 1/2 barb fittings. I used the 3/8 ones.

Sent from my SM-G930V using Tapatalk

 

[HACK BLOCK]

My catch can came with 3/8 and 1/2 barb fittings. I used the 3/8 ones.

Sent from my SM-G930V using Tapatalk

I was thinking of stretching the 3/8 hose over the 1/2 fittings and using hose clamps

 

[gooffeyguy]

I was thinking of stretching the 3/8 hose over the 1/2 fittings and using hose clamps

If that works, go for it.

My 3/8 fuel line hoses were pretty tight getting onto my barbs.

Sent from my SM-G930V using Tapatalk

 

[HACK BLOCK]

last time I had to do something like this I soaked the ends in warm water then stuck a needle nose into them to kind of stretch them out and slipped it on real quick

 

[rdhogg]

the main thing to focus on is the primary side for a catch can.
the side that goes from the driver side valve cover, and then right into the top of the intake.
I just snipped the plastic line and attached the extension for my catch can.

The other side is not a priority.

This is how i choose to do mine.
Mostly i had aluminum line left over from my vette project, and not enough silicone hose.
Too lazy to go to the store, this is how i ran it!
View attachment 270019
View attachment 270020

the red ends are the flex joints.
the long red line at the bottom of the fuse box is the flex joint for the can side.

The bits of red hose in the middle serve as an isolator, purely there to keep the hard lines from rubbing together, and against other hard objects.

the silicone hose was also left over from my vette project.
It's color scheme is red and silver...

Very Nice,

 

[rdhogg]

where are you guys mounting your catch cans? mine came with no bracket so gotta figure something out

I mounted my Moroso can to the brake booster to keep it out of the way , plus the tubbing runs to the back of the engine

 

[donjetman]

No check valve.
2 yrs ago I mounted my $25 catch can on the hood airspring mount.

 

[HACK BLOCK]

No check valve.
2 yrs ago I mounted my $25 catch can on the hood airspring mount.

View attachment 270152

with the check valve I was referring to the passenger side breather hose

 

[3JFamily]

I have a 2006 5.3 Suburban. Here's some info.
Within the past month or two, I've started to experience a puff of smoke on start up.
Not everytime but only after sitting. like overnight as an example. clears up after starting. No smoke otherwise. Truck now has 152K miles.
Half a can of Seafoam in crankcase seems to have cured the issue but I still have gotten a smaller puff one or two times since.

Anyway, is the catch can supposed to mitigate this issue or is it just to stop vented oil?

 

[donjetman]

If your engine is sucking oil out of the engine by way of an inop PVC system and burning it, it will eventually start sticking the piston rings, thus puffing smoke on startup. Also, if the pvc system is inop for whatever reason, oil is more likely to get past the valve seals and into the combustion chamber and cause the smoke at startup. If this is the case? a catch can is a bandaid on the real problem.

We bought our 07 6.2 Denali 2+ yrs ago w/132k miles. It was leaking and burning 1 oz of oil every 100 miles. The first thing I did was install my $25 catch can. It was catching a lot of oil. Then I discovered GM TSB# 10-01-06-008M.

https://f01.justanswer.com/ebrock63...il+Consumption,+MIL+ON,+Engine+Runs+Rough.pdf

I installed the improved driver side valve cover, GM# 12570427, and did a 2 day long piston/combustion chamber soak with Gunk Motor Medic. I also replaced the engine rear main seal that was leaking. Now at 164k miles the engine doesn't consume any oil. The catch can then and now collects very little of anything. I left it in place to be a "canary in a coal mine".