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Old 03-02-2013, 05:36 PM   #18
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Sound is normal as long as you verified no vacuum leaks. Can should never be under pressure, only vacuum.

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Old 03-02-2013, 08:07 PM   #19
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The top and side fittings, did you tighten them as much as you could?
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Old 03-02-2013, 11:11 PM   #20
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The top and side fittings, did you tighten them as much as you could?
Yep as much as possible did not want to wring it off. It's not leaking just loud as hell.
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Old 03-03-2013, 07:23 AM   #21
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Odd, I know I have a V8 but I have no hissing sound at all.
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Old 03-03-2013, 09:00 AM   #22
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I have no hissing and no oil because my vave seals and pistons rings are seated well and should be for a long time................many people on here have shown so much oil I would be worried about their cars at such low miles that they have they have not had things sealed as tight as they should be....I know i used to build my own engines, and build my own hot rods..........The v-8 pcv is right by the throttle body and the return line also, you nave so much noise probably because the line on your v-6 goes right up to the middle of the cylinder banks to the intake plenum and somehow to a side of the cylinder heads?
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Old 03-03-2013, 03:47 PM   #23
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Yep as much as possible did not want to wring it off. It's not leaking just loud as hell.
What do you mean wring it off? It would only fall off if it's loosened by turning it to the left all the way. I turned it to the right until it was tight and where I wanted it to be pointing. If either fitting is easily adjusted by hand, I would tighten them with a tool. That's just my guess. Other than that, try connecting the hose back to the stock PCV location and bypass the catch can. See if there's any difference in sound.
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Old 03-03-2013, 08:19 PM   #24
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[QUOTE=jameslk350;6240135]What do you mean wring it off?


WRING OFF AKA TO TORQUE (tighten) to point which breaks or strips threads.
Yes I tightened with wrench.


Thanks ...I'm almost certain at this point the sound is from the turbulence of flow moving through the soft rubber hose. The oem was rigid design and its I.D. was smaller.

Few different folks sent me pm's describing this very sound in thier hoses after they installed catch can themselves so apparently this is normal.

Keep in mind it is not heard on startup only after couple minutes running then its audible vacuum leak sound.
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Old 03-03-2013, 08:31 PM   #25
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WRING OFF AKA TO TORQUE (tighten) to point which breaks or strips threads.
Yes I tightened with wrench.


Thanks ...I'm almost certain at this point the sound is from the turbulence of flow moving through the soft rubber hose. The oem was rigid design and its I.D. was smaller.

Few different folks sent me pm's describing this very sound in thier hoses after they installed catch can themselves so apparently this is normal.

Keep in mind it is not heard on startup only after couple minutes running then its audible vacuum leak sound.
I actually switched the hoses out for transmission hoses for my installation. They're a bit more rigid.
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Old 03-03-2013, 08:40 PM   #26
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I actually switched the hoses out for transmission hoses for my installation. They're a bit more rigid.
Ok I keep that in mind.
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Old 04-09-2013, 12:36 PM   #27
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same here

Did you figure out the cause of the hissing sound? My LS is experiencing the same thing right now. No visible leaks, catch can collecting oil as it should be doing, just don't know why the noise?

To all the Pro's out there, can my recent addition of Ice-olator, ported TB, and plenum spacer be contributing factor in the hissing noise. Meaning with all the extra air the car is now pulling in cause this?
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Old 04-09-2013, 12:38 PM   #28
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Did you figure out the cause of the hissing sound? My LS is experiencing the same thing right now. No visible leaks, catch can collecting oil as it should be doing, just don't know why the noise?

To all the Pro's out there, can my recent addition of Ice-olator, ported TB, and plenum spacer be contributing factor in the hissing noise. Meaning with all the extra air the car is now pulling in cause this?
You still planning to come by tonight?


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Old 04-19-2013, 08:29 AM   #29
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I think I figured it out!

Well, since my Elite CC was also making this noise on my LLT, I decided to take the fittings off and put new telflon tape on it just to be sure no leak. As I removed the top fitting, I looked inside and noticed in the filter chamber they use some sort of "Scotchbrite" looking material on top of the filter element, that's when I realized that was the cause of the "hissing" noise!
If you take a piece of paper and blow on the edge you hear that sound, now multiply that a couple of times and you get the "hissing" noise. I trully believe the rush of air into that chamber creates that effect. Also, the sound might be more pronounced if you have Ice-olator, plenum spacer, or Ported TB installed.
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Old 04-19-2013, 10:28 AM   #30
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This is probably not an issue.....a hiss in most cans is as described above is normal, but yes, stiff wall hoses are reccomended so there is chance of collapsing under vacuum. There should be no pressure in any can. Also, if you have a vacuum leak this will usually trip a CEL for a lean conditon, so if that is not happening I would not be very concerned.

One last thing to keep in mind is the serpentine belt hisses (the more miles, the louder) and the brake/vacuum booster pump is right where most cans are mounted so that makes a hiss as well.

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Old 05-11-2013, 08:57 PM   #31
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I hear this sound as well just after installing ported throttle body and catch an.
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Old 05-11-2013, 10:02 PM   #32
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I hear this sound as well just after installing ported throttle body and catch an.
Nothing to worry about as long as you did the install correctly.
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Old 05-12-2013, 10:39 AM   #33
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Always use a stiff wall hose like trans cooler hose or hydraulic rated. Fuel line becomes to sift and collapses under vacuum. And all cans will have noise from the flow through them.

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Old 05-13-2013, 12:41 PM   #34
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Elite catch can mod

This is how I installed my Elite can. I first added a drain port in the bottom to make it easier to check for any drip, and the used ss fitting and tubing to route beneath engine cover.
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