[BO185]

Run the LS6 valley tray this will give you a port for air out which will run to the port on the FAST intake.

Then on the back of one of the valve covers install the "fresh air in" port and make a port on the intake tube itself aft of the MAF connect those two together. So fresh air comes from intake tube to valve cover through motor out valley tray then to intake. The Fast intake should have a PCV port on it.

Use this on the back side or front of a valve cover.
http://www.42draftdesigns.com/ultimate-oil-catch-can-90-outlet/

Or have some one Tig weld a bung on one of the valve covers, preferably the back or side close the valley.

 

[BO185]

There is no PCV valve its just a hole basically gm quit using a valve in early 2000’s. The PCV is postive crank ventilation system not just a valve. You still need a fresh air in point. Gm used a valve cover port for fesh air in on the LS6 and later car motors, air came from the TB (air from infront of TB blade) or a port on intake tube.

You have to have a fresh air in or you not venting anything just will he sucking air past crank seals.

Again for the CORRECT PCV system you need fresh filtered air from intake tube trough a valve cover through LS6 tray to intake port.

Attached is stock LS6 system. If your TB doesn’t have a port you need to add one to the intake tube aft of MAF. You can run one hose from it to one valve cover. You’ll need to add a port to a valve cover.

The PCV system is the most misunderstood system I see it incorrect installed the most. And guys wondered why there motor leaks oil or won’t idle right.

 

[BO185]

Ok so silver port on TB needs to go to a valve cover “port”. Then port on LS6 valley tray goes to the plastic port on intake itself and you’ll be good to go.

You don’t need line/ports on each valve cover a single port on pass valve cover is fine. The port I linked may work by adding it to the passenger front side of valve cover.

 

[BO185]

There is a hose for the intake to valley cover

http://www.improvedracing.com/air-f...eproductsearchusen&utm_medium=product_search&utm_source=googleproductsearchusen

Amazon has it for $8.24 shipped way cheaper. Enter 12594779 in amazon search and will pop up.

 

[BO185]

What is the big hole at the rear of the 5.3 drivers side stock valve cover for?

It has a rubber grommet in it and looks like the grommet for a PCV fitting.

Wayne

Its for a PCV valve as mentioned. The early motors, car and truck, had an actual PCV valve. Around 02-03 GM quit using a PCV valve. The later ones just use a small orifice in the valve cover to do the same thing. If yours has a valve retain it for your PCV system to work correctly.

 

[BO185]

I have the LS6 Valley Cover and a line on the front of the Passenger side valve cover. Do I really need a PCV in addition to that? This is a 2001 motor.

Wayne

No PCV valve need with that valley tray. The (valve) orifice is in the valley cover itself. The port on valley cover needs to go into an intake port.

Plug drivers valve cover port. The pass side port goes to Port on TB if it has one if not needs to go into intake tube art of MAF.

 

[BO185]

Got it! I also have an LS6 intake that has the port for the hose from the valley cover and a truck throttle body that has the fresh air port going to the passenger valve cover.

Wayne

Sounds correct. Have you set the intake on the motor yet? If not you will need to delete the rear steam lines if yours has them. Some early truck motors had rear lines to ports in head under intake GM deleted these later as found they weren't needed. You can buy OEM plugs for cheap and the front single line cross over. Then just bypass the TB heater line ports too and steam line goes to Raditor or tee into upper rad hose or can drill into top of water pump several ways to do it.