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-   -   Oil Catch Can Question... (https://www.corvetteforum.com/forums/c5-tech/1561103-oil-catch-can-question.html)

RonVette2 11-29-2006 12:51 PM

This is my installation, I put back the hose from the valve cover to the throttle body. I took the little plastic "U" shaped hose from the PCV valve and installed the hose off the valley pan cover to the side of the oil catch can, then attached the hose from the top of the can to the intake manifold.

http://i127.photobucket.com/albums/p...lcatchcan1.jpg

http://i127.photobucket.com/albums/p...lcatchcan2.jpg

:thumbs:

Dan_the_C5_Man 11-29-2006 01:30 PM


Originally Posted by Ikester
Got pics?

Yikes! It looks cleaner in person, I promise! :D :cheers:

http://bellsouthpwp.net/d/a/dansmallwood/catch_can.jpg

RonVette2 11-29-2006 01:41 PM

Dan, do you have that can plumbed into the Valve cover and the PCV lines together?

Dan_the_C5_Man 11-29-2006 03:37 PM

Not sure I understand your question.. Some pictures are worth a 1,000 words.. It should be clear why the catch-can is where it is. :cheers:

http://bellsouthpwp.net/d/a/dansmallwood/PCV_P1.jpg
http://bellsouthpwp.net/d/a/dansmallwood/PCV_P2.jpg

see5 11-29-2006 04:08 PM


Originally Posted by Dan_the_C5_Man
Not sure I understand your question.. Some pictures are worth a 1,000 words.. It should be clear why the catch-can is where it is. :cheers:

http://bellsouthpwp.net/d/a/dansmallwood/PCV_P1.jpg
http://bellsouthpwp.net/d/a/dansmallwood/PCV_P2.jpg

Shown is one of GM's early schemes. It has changed substantially from that schematic. The valley cover vent (LS6), now restricted flow, is new on the LS2s.

LoneStarFRC 11-29-2006 05:39 PM


Originally Posted by jbauch357
This is how I have mine set up, and have approx 1/8" of oil in the can after 1000 miles.

http://i90.photobucket.com/albums/k2...m/IMG_1954.jpg

:iagree: Same here Josh. The only difference on mine is that I have the can mounted up forward on the inside of the frame rail. I drain approx. 2oz of oil every 4000 miles.

LoneStarFRC 11-29-2006 05:51 PM


Originally Posted by see5
Shown is one of GM's early schemes. It has changed substantially from that schematic. The valley cover vent (LS6), now restricted flow, is new on the LS2s.

:iagree: Dan's picture shows the earlier version on the hose routing that RonVette2's Z06 does not have. I originally had this set-up but converted over to the "Z06" version a long time ago and in order to do so had to plug the drivers side rear and passenger's side rear fittings on the valve covers and ditch that monstrocity of a pcv hose lash-up that came from GM. :lol:

Dan_the_C5_Man 11-29-2006 05:58 PM

O.k., I understand I'm dealing with "outdated technology":D, but let's not confuse the issue; the basic theories still apply, i.e. retaining the closed-loop PCV system, inserting the catch-can between the "output" (crankcase) and vacuum (intake manifold), not the "input" (filtered air into the crankcase).:cheers:

LoneStarFRC 11-29-2006 06:09 PM


Originally Posted by Dan_the_C5_Man
O.k., I understand I'm dealing with "outdated technology":D , but let's not confuse the issue; the basic theories still apply, i.e. retaining the closed-loop PCV system, inserting the catch-can between the "output" (crankcase) and vacuum (intake manifold), not the "input" (filtered air into the crankcase).:cheers:

:cheers: Correctmundo! I sometimes almost forget too that some of the newer C5 owners that ask questions regarding the C5 set-up is quite often based on what they have on their car and they assume that their set-up is the way all C5s are.
Thanks Dan

Dirty Howie 11-30-2006 12:17 AM


Originally Posted by Dan_the_C5_Man
O.k., I understand I'm dealing with "outdated technology":D , but let's not confuse the issue; the basic theories still apply, i.e. retaining the closed-loop PCV system, inserting the catch-can between the "output" (crankcase) and vacuum (intake manifold), not the "input" (filtered air into the crankcase).:cheers:

I agree that a can should be in the line from crankcase to intake manifold. I also think that one should be in the fresh air line from valve cover to throttle body or air bridge (if you have a LS2 TB as many do).....because you WILL get oil going that way too (just look and read what those diagrams you posted say). Plus I have demonstrated this problem in the past and many have seen it too.

So I run a little Husky (modified) in the fresth air line. And a AMW and a Husky in the line to the intake manifold which is the main culprit.

Here is my customized filter. It should trap MOST oil vapor. Flow is down thru 3/8 hose attached to where the stone filter was removed...into and thru the mesh....then back out the top.

http://i20.photobucket.com/albums/b2...iltersetup.jpg

:cheers:
DH

Ikester 11-30-2006 11:48 AM


Originally Posted by Dan_the_C5_Man
Yikes! It looks cleaner in person, I promise! :D :cheers:

[img]http/d/a/dansmallwood/catch_can.jpg[/img]

Thanks for sharing...

So your stating that if I route the hoses per the instructions, I can still have oil run into the intake? :bigears

Dan_the_C5_Man 11-30-2006 12:06 PM

Not necessarily.. The installation of ANY catch-can between the PCV and intake is better than none at all.

What I'm saying is it makes common sense to force the oil / oil-filled vapors to make a 180 degree turn, go vertical before hitting the intake, vs. the suggested method supplied with the catch-can instructions, where the vapors could potentially make their way to the side vent.

Honestly, you'd probably have a hard time measuring a difference between the two routing schemes; do what you think is logical. :cheers:

Ikester 11-30-2006 01:03 PM


Originally Posted by Dan_the_C5_Man
Not necessarily.. The installation of ANY catch-can between the PCV and intake is better than none at all.

What I'm saying is it makes common sense to force the oil / oil-filled vapors to make a 180 degree turn, go vertical before hitting the intake, vs. the suggested method supplied with the catch-can instructions, where the vapors could potentially make their way to the side vent.

Honestly, you'd probably have a hard time measuring a difference between the two routing schemes; do what you think is logical. :cheers:

your way does makes more sense. Im surprised elite didnt set it up this way

miami993c297 11-30-2006 01:25 PM

Dan,

Does it make a difference having the PCV valve mounted on the Intake side or on the Valley Cover side?
If yes what is according to your test the best place?

Christian

RonVette2 11-30-2006 01:29 PM

It looks like most, me included have left the PCV valve in its original place which I believe is attached to the intake manifold, I too have intalled the intake hose to the top of my oil catach can, and the hose from the valley pan cover to the side of the oil catch can, pictures above. :thumbs:

Dan_the_C5_Man 11-30-2006 03:08 PM


Originally Posted by miami993c297
Dan,

Does it make a difference having the PCV valve mounted on the Intake side or on the Valley Cover side?
If yes what is according to your test the best place?

Christian

Logically I can't see it making any difference what-so-ever, vacuum should be identical, so whatever works for you.. :cheers:

briann510 11-30-2006 03:35 PM

Mine should be arriving today and after reading his thread Im not sure how I will be installing it yet. it makes perfect sense though to have the top fitting as the outlet going to pcv valve/intake and the side fitting as the inlet from the valley pan.

miami993c297 11-30-2006 03:46 PM


Originally Posted by Dan_the_C5_Man
Logically I can't see it making any difference what-so-ever, vacuum should be identical, so whatever works for you.. :cheers:

Thanks

Christian

ALLEGRO 11-30-2006 04:37 PM

I admit I am tired right now, but you guys have confused the HECK out of me.

I have mine routed as such:

I took the short line that led from the PCV valve to the TB, led that line to the filter, then the return leads back to where the original line went into the TB. I get a bit of oil, but never more that an ounce or so.

Is mine correct?

Dan_the_C5_Man 11-30-2006 04:43 PM


Originally Posted by ALLEGRO
I admit I am tired right now, but you guys have confused the HECK out of me.

I have mine routed as such:

I took the short line that led from the PCV valve to the TB, led that line to the filter, then the return leads back to where the original line went into the TB. I get a bit of oil, but never more that an ounce or so.

Is mine correct?

Careful with your terminology, it can (and will) lead to confusion.

You say "short line from PCV to TB" (throttle-body), when what I believe you really meant to say is "short line from PCV to intake manifold".

If you review the pictures posted in this thread, do they match your configuration? :cheers:


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