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Old 12-29-2009, 02:18 PM   #1
lawdogg149
 
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DIY: PCV catch can install

Well for those whom have knowledge of the LS engines and how much oil is sent back through the factory intake manifold. There is a mod known by many builders and race teams.

First thing is a LS engine is designed to be positive crank pressure in the bottom end of the engine. This has some advantages but many disadvantages for those performance minded people.

Oil and vapor is factory sent back through the PCV valve and into the factory intake tubing. A simple test is to take the factory intake tubing loose at the throttle body and push open the throttle body and look inside with a flash light. Oil everywhere if you drive the car the way it was designed. This then travels downward to your valves and onto the tops of your pistons. In which its now burnt. This in turn leaves a coating on the pistons that will effect performance alot.

So lets fix it...........

Needed:
PCV Catch Can -many can be bought I like Billet Technology in Floridas.
3/8 fuel line hose 3 ft
3/8 tee
3/8 rubber plug

First off.
Remove the factory hose that runs from the passenger valve cover to the air intake piping (factory is straight in the side of the piping before the throttle body)

Next look below the throttle body and remove the hose coming from the valley pan to the side of the intake manifold.Plug the manifold connection with the 3/8 rubber plug.

Now we need to run a hose from the valley pan to where the catch can will be. Next run a hose from the valve cover connection on the passenger side which we removed before to the catch can.

So now we have two hoses which need to be connected with the Tee and run a small hose to one side of the catch can. On the other side of the catch can we can add a filter there or run a hose and mount somewhere else. I ran my filter to the very bottom of the car so if oil did escape it wouldnt be all over the engine.

This simple mod will allow the engine to breath both in and out. Also will keep from the oil and vapor from being sent back into the intake track. Engines are not designed this way because they cannot legally be made to vent vapors into the air only through the exhaust pipe. Another good idea would be to just run the out tube to a welded in fitting in the exhaust so it wouldnt breath into the free world we live in.

I would be happy to explain more details if needed just pm me. I have nothing to sell from this or gain nothing at all. Just a performance minded racer passing on a good tip for performance minded people.

Thanks for reading
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Old 12-29-2009, 02:29 PM   #2
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great right up-now i just gotta figure out where those hoses are-and where to get a 3.8ths plug lol
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top 10 reason why real men drive stick.

10. A manual transmission is the ultimate in control
9. You can use automotive jargon and not sound like a total tool
8. You can't spell "manual" without "man"
7. Manual transmissions prove you can do more than one thing at a time
6. You can't drift in an auto
5. You can't pull fancy moves in an automatic
4. You get better fuel economy with a stick
3. You値l never look like a chump if you can drive stick
2. Manual transmission cars are faster
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Old 12-29-2009, 02:34 PM   #3
lawdogg149
 
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The PCV valve cover one is easy. Only hose that connected to the factory air intake piping follow it back to the valve cover. The second one is directly below the Throttle body and angles towards the passenger side. This is the key port which is venting the whole lower crank case.
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Old 12-29-2009, 02:40 PM   #4
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alright cool-were can i get fuel line? and how long? and as for the 3/8 tee and rubber plug- i could get that at hd?
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top 10 reason why real men drive stick.

10. A manual transmission is the ultimate in control
9. You can use automotive jargon and not sound like a total tool
8. You can't spell "manual" without "man"
7. Manual transmissions prove you can do more than one thing at a time
6. You can't drift in an auto
5. You can't pull fancy moves in an automatic
4. You get better fuel economy with a stick
3. You値l never look like a chump if you can drive stick
2. Manual transmission cars are faster
1. Women like a guy who is good with his hands.

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Old 12-29-2009, 02:44 PM   #5
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and for last cuz ima pick this stuff up todaywhat does the rubber plug look like? i just checked out my home depot here-didnt see any 3/8hs plugs hmmm
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top 10 reason why real men drive stick.

10. A manual transmission is the ultimate in control
9. You can use automotive jargon and not sound like a total tool
8. You can't spell "manual" without "man"
7. Manual transmissions prove you can do more than one thing at a time
6. You can't drift in an auto
5. You can't pull fancy moves in an automatic
4. You get better fuel economy with a stick
3. You値l never look like a chump if you can drive stick
2. Manual transmission cars are faster
1. Women like a guy who is good with his hands.

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Old 12-29-2009, 02:49 PM   #6
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fuel line or hose auto zone or such 3 foot plenty. Plug see photo #3 right side right behind the throttle body motor has a zip tie on it as well. All could be bought at the HD most likely. FrankT has a custom built one out of parts from HD. Air water separator near the air comp section. Thats the cheapest option.
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Old 12-29-2009, 02:56 PM   #7
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i went to look for a 3/8ths tee here-and all these dudes have that i saw is 1/2x 3/8ths either im blind or what not lol
is brass one ok?
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top 10 reason why real men drive stick.

10. A manual transmission is the ultimate in control
9. You can use automotive jargon and not sound like a total tool
8. You can't spell "manual" without "man"
7. Manual transmissions prove you can do more than one thing at a time
6. You can't drift in an auto
5. You can't pull fancy moves in an automatic
4. You get better fuel economy with a stick
3. You値l never look like a chump if you can drive stick
2. Manual transmission cars are faster
1. Women like a guy who is good with his hands.

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Old 12-29-2009, 02:58 PM   #8
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Brass is great. Just make sure it connects with your hose good thats all.
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Old 12-29-2009, 02:59 PM   #9
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ok nm i see you used a pvc type t? still looking for the plug! lol i must be blind
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top 10 reason why real men drive stick.

10. A manual transmission is the ultimate in control
9. You can use automotive jargon and not sound like a total tool
8. You can't spell "manual" without "man"
7. Manual transmissions prove you can do more than one thing at a time
6. You can't drift in an auto
5. You can't pull fancy moves in an automatic
4. You get better fuel economy with a stick
3. You値l never look like a chump if you can drive stick
2. Manual transmission cars are faster
1. Women like a guy who is good with his hands.

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Old 12-29-2009, 03:26 PM   #10
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ok i think i see it-black plug right? yea ima little slow-what kinda plug is that? cuz i see nothing of such here at home depot
__________________
top 10 reason why real men drive stick.

10. A manual transmission is the ultimate in control
9. You can use automotive jargon and not sound like a total tool
8. You can't spell "manual" without "man"
7. Manual transmissions prove you can do more than one thing at a time
6. You can't drift in an auto
5. You can't pull fancy moves in an automatic
4. You get better fuel economy with a stick
3. You値l never look like a chump if you can drive stick
2. Manual transmission cars are faster
1. Women like a guy who is good with his hands.

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Old 12-29-2009, 05:03 PM   #11
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OK what do you mean into the air intake piping? You mean the CAI? So one of the hoses just vents straight down into the engine bay correct? The T is used to have the hose go back into the original location?
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Old 12-29-2009, 06:53 PM   #12
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Air intake piping is the cold air kit if some have installed or the factory air intake piping. Two things plug into the air intake tube a MAS sensor and a PCV hose. You can do either vent straight out into the open or vent back into the original place on the air intake tubing. I personally like out into the open. The T is used to connect the hose from the valve cover and the hose from the valley pan in which creates one hose that goes to one side of the catch can. Other side of catch can is used as a vent to either free air or back into the intake piping.
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Old 12-29-2009, 07:03 PM   #13
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ima order my cath can this weekend- and then autozone has brass t
but if your using pvc tees then i can get thqt from hd, then i just need to find the rubber plug
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top 10 reason why real men drive stick.

10. A manual transmission is the ultimate in control
9. You can use automotive jargon and not sound like a total tool
8. You can't spell "manual" without "man"
7. Manual transmissions prove you can do more than one thing at a time
6. You can't drift in an auto
5. You can't pull fancy moves in an automatic
4. You get better fuel economy with a stick
3. You値l never look like a chump if you can drive stick
2. Manual transmission cars are faster
1. Women like a guy who is good with his hands.

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Old 12-29-2009, 07:16 PM   #14
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Easy install.....Here is how much oil was in the intake at 800 miles:



I have a question on the Tee to an open hose....

1. Is there a filter on the open hose? If not, whats to prevent dust & dirt getting in through any reversion?

2. For the crankcase to be properly "flushed" of the harmful combustion byproducts (unburnt fuel, carbon particles, sulferic acid, etc.) vacuum must be pulled with a filtered fresh air source (the air coupler on a stock system allows air filtered from the main air filter in, and the intake manifold vacuum pulls it through flushing the nasty crap out) so ideally you have a cross flow of filtered fresh air through the crankcase where the flashed off byproducts can be removed. The catch can trps the vapors long enough for the oil to fall out of suspension & be trapped in the can to remove later.

So how is the flow pulled through the crankcase with a "Tee" in the line? Just making sure the purpose of the PCV system is not being inadvertantly defeated.

The oil is a very real problem not only for the power loss, but the carbon buildup on the piston tops & valves.

Here are some diagrams of a proper system. Anyone that wants the whole file of all applications for every Gen LS motor, N/A and FI just PM me your email & I'll send it:



This is the one that applies to the 2010 LS3:

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Old 12-29-2009, 07:31 PM   #15
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PM'd ya for the catch can files. Still looking for a inexpensive but not a cheap looking catch can.
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Old 12-29-2009, 08:07 PM   #16
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SC2150 I also pm'd you for the diagram for the LS3 engine. Thank you
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Old 12-29-2009, 08:08 PM   #17
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Diagram above is great for explaining.

first the tee is used to combine the green hose and the blue one from the valley pan. The blue hose on the manifold its self is blocked off with the cap. So now the green hose and blue hose go to one side of the catch can. The other side of the can has a short hose and filter on the end. This is used for allowing the system to breath. Could be hooked back into the intake manifold or intake piping if wanted too. No harm if done that way.
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Old 12-29-2009, 08:09 PM   #18
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E-Bay Keyword "oil Catch Can" 2024 choices. I just purchased a carbon fiber one for $58 free shipping.
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Old 12-29-2009, 08:09 PM   #19
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I'll get them out tomorrow as soon as I get to the office.
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Old 12-29-2009, 08:13 PM   #20
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Quote:
Originally Posted by Mzodarg View Post
E-Bay Keyword "oil Catch Can" 2024 choices. I just purchased a carbon fiber one for $58 free shipping.

Most of those are just empty cans with 2 fittings in them....no way to trap the majority of the oil. They are basically overflow catch cans such as we would use for a coolant, or tranny vent (per NHRA & IHRA rules). To be effective a true oil seperating can has to have a series of baffles or the vapors just go in the inlet, and right out the outlet a few inches away.
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Old 12-29-2009, 08:18 PM   #21
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Cool

What about this, or is this the same. Almost all cars/trucks.
Pvc valve runs to the air intake just in front of the throttle body.
What if you place the catch can in line between the pvc valve and the air in take? is'nt this doing the same?
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Old 12-29-2009, 08:18 PM   #22
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Quote:
Originally Posted by SC2150 View Post
Most of those are just empty cans with 2 fittings in them....no way to trap the majority of the oil. They are basically overflow catch cans such as we would use for a coolant, or tranny vent (per NHRA & IHRA rules). To be effective a true oil seperating can has to have a series of baffles or the vapors just go in the inlet, and right out the outlet a few inches away.
I like the way I vent my Harley, to the Street.... Canceled that order...
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Old 12-29-2009, 08:21 PM   #23
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Cool

Quote:
Originally Posted by Mzodarg View Post
I like the way I vent my Harley, to the Street.... Canceled that order...
I put power vents on my fxstdi. Looks alot better also.
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Old 12-29-2009, 08:23 PM   #24
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Quote:
Originally Posted by Mzodarg View Post
I like the way I vent my Harley, to the Street.... Canceled that order...

I love the bike! I had a 37 Knucklehead hardtail for years when young..sold the dang thing in the middle of winter (in WI) for a song when broke....never have gotten over that dumb move.
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Old 12-29-2009, 09:01 PM   #25
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PM sent for catch can files. thanks a ton for helping us fellow members out!
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