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Engine Valve ???

4K views 19 replies 9 participants last post by  Walt 
#1 ·
What is this tube ( traced in green and identified by the red arrows ) and where do I get another one? It makes this weird noise like air isn't passing through properly and when I clamp the tube the sound goes away. Thanks in advance.

(5.7L)

 
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#3 ·
Thanks that was taken back in july.. now it's not so clean :D

Is it the EGR valve?
 
#7 ·
the EGR is the copper colored tube at the front of the manifold. Listen to Escape and dont touch it.....LOL. Also...dont do like me and pull it out, lose the seal and then bend the tube....LOL. Itll cost ya about $100 if ya do....:thumbsup:
 
#8 ·
Thanks so much for the invaluable information :cool: The noise has been driving me nuts it doesn't sound healthy at all.

So touch the bronze tube, right....?








:D j/p
 
#10 ·
Hahahahaha, well played.
 
#11 ·
ok guys I am confused so I ned a litttle help.

Got it, EGR is the copper tube pass side of the TB. Very hot, I have touched it, and I would recommend not touching it. HAHA

PCV hose, marked in green, goes to the black circular housing that has the PCV valve in it.

SOOO WTF is the tube that connects to the nipple on the intake and runs across the engine to below the oil cap (pic below)????? I replaced it with a filter b/c I was sick of the tube...what exactly did I do other that IMO clean up the engine bay a little?? Thanks for the help guys, I feel like a total newb

 
#18 ·
Think the one he referred to is the fresh air makeup to the crankcase on the LHS fwd of the engine. ;) Rubber hose/metal tube/rubber hose combo runs from the combustion air intake box to the crankcase. Makes up air pulled out by the PCV valve. Tap point is downstream of the air filter element so it's not dirt-laden. :thumbsup:
Use of a separate filter in place of the factory plumbing should be acceptable and not affect emissions controls performance. As stated, it does clean up the area. :)
 
#12 ·
It's a recirculating tube for lack of better description. The oil that doesn't get burned off in the manifold is supposed to return back into the intake/TB and back into the manifold via that tube for a second attempt at burning it off within the engine, not the atmosphere.

You added a filter so vapors and what-not are exiting through the filter and not back into the manifold.. illegal in CA.. just put the tube back on if you go for a smog check.
 
#13 ·
thanks Ryan exactly what I needed to know. cool I kept the tube that came with the bwoody so I will put that on for the smog in a couple years. Does that help with efficency at all? Seems akward to recirculate vapors back through engine...but makes sense from an emissions standpoint.
 
#14 ·
My truck was shooting oil out of there when I had a filter on it. Now I have a second catch can attached between there and the intake tube.

You should install a catch can in your PCV line as long as you're screwing with it. You probably have a pool of oil in your intake manifold without one.
 
#15 ·
Is that becuase the vaccum from the intake is not pulling it out and runing it back through the TB? Where was the oil coming out? I do seem to have some oily residue at the base of the PCV circular housing...is that where yours was coming out?

Fawk Mike now you got me all worried HAHA
 
#16 ·
No, its because the Hemi, like most larger displacement pushrod motors, has blow by issues and a poor designed PCV system. We have it, the LS motors have it, and alot of the crate motors from Mopar and GM have it.

What happens is when the oil collects in the manifold, some gets sucked into the combustion chambers and causes knock, because oil doesn't combust.

Or on the breather line, the motor literally sucks the oil out of itself. At WOT theres so much vacuum that it draws the oil through the hose from the valve cover and into the intake. If you lift, you get a oil soaked air filter. If you don't, it ends up in the manifold.
 
#17 ·
wow I think I am starting to understand. so the oil/fumes that are now being directed through the filter I added would normally be running back through the intake/TB/IM to combust rather than "escape" like I am allowing it to...correct?

So, by me adding that filter and not allowing those fumes to recirculate through the engine, can I cause ANY problems? IMO it seems like that would have little effect, and even make it a little more efficent, just not enviro friendly.

Then as for the catch-can...does the mod I did with the filter and the CC need to work hand-in-hand to ensure I don't cause any issues?

I really appreciate your help Mike...seriously dude I was totally lost for a min, and now I see the map just need a little direction :)
 
#20 ·
Yep that's exactly what I was talking about! Thanks a lot bro for the clarification...when u start right into new mods on a new platform I can get confused so my apologizes if I misled anyone!!!
Happy to help and give back what others provided me earlier. We learn by our mistakes. The "job" of the other forum members is to prevent you from making any major ones.

"Good judgment comes from experience; experience comes from bad judgment." :D
 
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