Full Catch Can --> A Lot of "Blow by"

[Al Handy]

I have a 2018 PW and there is a breather tube from the left front of the engine that runs directly into the intake tube just prior to the valve body. If the PCV is internal, and dumps the vented gasses back into the engine itself, why is this breather there, and why is it on the "up stream" or the "suction" side of the valve body. It would make sense to me to place a catch can inline between the engine vent nipple and the air intake hose.

Oh and I looked all over the engine trying to find the PCV now I know why I could not find one.

 

[Tach_tech]

The hose that goes to the intake tube is the breather inlet. It allows fresh air to enter the crank case.

 

[Al Handy]

OK thanks^^^^^^ Just did not make sense to me since it is so close to the valve body

 

[Hemi_Express2013]

https://www.google.com/url?sa=t&sou...FjABegQIBhAB&usg=AOvVaw31JJ0vSFiw_T0JM93jNTb3



Try that link. Explains the process.

 

[Outdoors76]

I have the little cap on my drain. Do you? I ask because my little cap is a PITA to get off. If I can run without that cap on and not cause in adverse effect, I'll drain it way more often.

do you mean the petcock on the bottom to drain?

yes mine has that i usually take a coffee cup down below and flip the valve to drain it

 

[KahneFan]

do you mean the petcock on the bottom to drain?

yes mine has that i usually take a coffee cup down below and flip the valve to drain it

See the little black cap on the end of my drain valve? That thing is a PAIN to get off.

 

[Outdoors76]

Ohh i have a valve on bottom of can

 

[Sasquatchtdg]

I'd love to see some parts links added to this thread! Which one seems to be the best?

 

[TXCOMT]

I like my BT...just unscrew it, dump it, clean it, screw it back on!

TXCOMT

 

[Longhorn1500]

I'd love to see some parts links added to this thread! Which one seems to be the best?

I doubt there are any better or worse ones out there. The design/concept is very simple, just catching the oil out of the PCV circuit. I have the Billet Technology one, Nick at Got Exhaust sells others, and I am sure there are others (E-BAY?). Some have drain valves, mine does not, others you just unscrew the can to drain.

 

[Karlsweg]

See the little black cap on the end of my drain valve? That thing is a PAIN to get off.

View attachment 156743

Is the trumpet in the way? Lol

 

[Wild one]

See the little black cap on the end of my drain valve? That thing is a PAIN to get off.

View attachment 156743

Stick a hose on the fitting and run it under the truck.With the right "L" shaped bracket your Moroso can should bolt to the rad or if your hoses are long enough to a fender bolt.

 

[Nick@GotExhaust]

As far as draining the UPR catch can goes, you can unscrew the bottom while in its easy to reach location at the front of the engine or you can go for the optional drain kit that includes a valve and hose.

 

[KahneFan]

Is the trumpet in the way? Lol

Not at all.

 

[indept]

See the little black cap on the end of my drain valve? That thing is a PAIN to get off.

View attachment 156743

That is ONE big horn in your Bighorn. I thought of putting one in my truck just to scare the crap out of the jackasses texting while driving under the speed limit in the left lane....

 

[KahneFan]

That is ONE big horn in your Bighorn. I thought of putting one in my truck just to scare the crap out of the jackasses texting while driving under the speed limit in the left lane....

I had to have the Hemi-tick fixed, so I moved the horn to my bed... annnd added another horn

 

[Karlsweg]

I had to have the Hemi-tick fixed, so I moved the horn to my bed... annnd added another horn

View attachment 156826

Well daaaaamn!

 

[500rider86]

I feel like most of the stuff a catch can catches will burn off. I know there’s oil but a lot of it looks like water too. And doesn’t the catch can condense the vapor in the line? If so maybe it would be more vapor form when it goes back to the engine and burn off. I just don’t see why capturing it is really that beneficial...

That being said that cup was full and nasty looking.

Anyone with a catch can notice the throttle body staying cleaner?

 

[500rider86]

Keep staying on the fence with catch cans. I read somewhere that the reason they collect so much oil is only because they end up condensing the vapor which causes the oil to come out of it. Normally it would stay in the vapor form and just be burned by the engine. Not sure which way to go. 125k miles on my truck and it seems to be okay without one so far.

 

[RLJ10X]

You guys haven't seen Blow By until you've spent some time with my KTM 990 Super Duke. I'm just guessing, but I'll bet that thing would fill a catch can every 400 miles. Come to think of it, maybe I out to figure a way to fit a catch can on that thing. That bike goes thru a quart of oil every 2000 miles. But it runs great! It makes ticking noises when I first start it up. I don't care. I'll just ride it until it goes bang.

For a big ol V8, my truck produces very little blow by, if you ask me. It's a very tight engine, as I suspect all of them are.