Question about pcv when using TBSS intake on Gen 3 engine
Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 347
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From: Tucson, AZ
Question about pcv when using TBSS intake on Gen 3 engine I have an 06 5.3l L33 with a TBSS intake on it. I am getting to the point in the swap where I need to figure out the pcv system. Most of the schematics I have seen have a port in the valley cover but mine does not.
I have a port in each valve cover, a port with a line in the top middle of the intake, the evap port which I can plug or use for something else, and a port on the side of the throttle body which is currently plugged.
Here is a pic with all the ports circled :
https://imgur.com/a/yv5u6J8
How do I hook this up and where do I place the pcv valve? I suppose I could run a catch can if need be. Any help or advice would be greatly appreciated! Thanks in advance!
I have a port in each valve cover, a port with a line in the top middle of the intake, the evap port which I can plug or use for something else, and a port on the side of the throttle body which is currently plugged.
Here is a pic with all the ports circled :
https://imgur.com/a/yv5u6J8
How do I hook this up and where do I place the pcv valve? I suppose I could run a catch can if need be. Any help or advice would be greatly appreciated! Thanks in advance!
TECH Enthusiast
Joined: Mar 2005
Posts: 663
Likes: 384
From: South Carolina
That pic you posted is a 2009+ TBSS intake with the hard plastic PCV line. The 2008 and earlier TBSS intakes have a nipple that takes a regular rubber hose to the PCV valve. You can use the 2009+ plastic PCV line but you have to cut it and clamp on a piece of hose to the PCV vlave. Some driver side valve covers have a removable PCV valve in a rubber grommet. Newer Gen 3 covers only have a nipple with a non replaceable PCV. The passenger valve cover hooks to the throttle body with a rubber hose.
Passenger Side
Attachment 713124
2008 and earlier intake with the PCV nipple that uses a rubber hose.
Attachment 712838
Passenger Side
Attachment 713124
2008 and earlier intake with the PCV nipple that uses a rubber hose.
Attachment 712838
Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 347
Likes: 66
From: Tucson, AZ
That is super helpful. So I can plug the evap port, cut the hard line and connect it to the driver side valve cover with rubber hose and an inline pcv, and connect the passenger side valve cover to the throttle body port and I should be all set, correct?
Thanks for your help!
Thanks for your help!
TECH Enthusiast
Joined: Mar 2005
Posts: 663
Likes: 384
From: South Carolina
That is super helpful. So I can plug the evap port, cut the hard line and connect it to the driver side valve cover with rubber hose and an inline pcv, and connect the passenger side valve cover to the throttle body port and I should be all set, correct?
Thanks for your help!
Thanks for your help!
Not sure what you mean by "inline pcv" as in aftermarket?
If your drivers valve cover has the rubber grommet there is a replaceable PCV valve with a GM part number. If your cover only has a nipple without the grommet THAT is the PCV valve. All you need is a vacuum soruce from the intake. I'm guessing the latter has a small metering orifice to act as the valve.
Replaceable PCV
Non Replaceable PCV just connect to a vacuum source
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Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 347
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From: Tucson, AZ
I have the second, non replaceable pcv. I will just cut the hard line coming from the intake and connect it to that valve cover with a piece of hose and some clamps. Thanks guys, I really appreciate it!
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That pic you posted is a 2009+ TBSS intake with the hard plastic PCV line. The 2008 and earlier TBSS intakes have a nipple that takes a regular rubber hose to the PCV valve. You can use the 2009+ plastic PCV line but you have to cut it and clamp on a piece of hose to the PCV vlave. Some driver side valve covers have a removable PCV valve in a rubber grommet. Newer Gen 3 covers only have a nipple with a non replaceable PCV. The passenger valve cover hooks to the throttle body with a rubber hose.
Passenger Side
Attachment 713124
2008 and earlier intake with the PCV nipple that uses a rubber hose.
Attachment 712838
Passenger Side
Attachment 713124
2008 and earlier intake with the PCV nipple that uses a rubber hose.
Attachment 712838
Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 347
Likes: 66
From: Tucson, AZ
I had a threaded insert welded to my intake tube, added a 90 degree fitting with a nipple, and ran a hose from that to the port near the fuel rail. I can post a pic if need be.