Chevrolet / GMC Diesel Tech Articles All years Duramax

DIY- PCV Reroute

 
 
 
 
  #1  
Old 07-20-2008, 04:15 PM
Johnny Cetane's Avatar
Diesel Bomber
Thread Starter
Join Date: Mar 2007
Location: Behind You
Posts: 6,191
Received 492 Likes on 383 Posts
Default DIY- PCV Reroute

This modification bypasses an important pollution control device and should be used for race applications only. Use at your own risk.

The PCV system allows oil to enter your turbo, CAC tubing and intercooler. Rerouting this by creating your own road-draft tube will keep this from happening. My method of doing this allows you to return your PCV system back to stock in about 10 minutes.

You'll need:
  1. 5-6 feet of 5/8" heater hose.
  2. Some hose clamps.
  3. 1 package of barstool leg caps in 7/8" or 1"
  4. Cable ties to hold the new tube in place.

First thing is to remove your air chamber. Once that is out of the way you will see the "T" fitting that connects the PCV system and routes it into your turbo.



At first I wasn't 100% sure about how I was going to do this so I started by cutting off the large crush clamp. I didn't need to do this in the end and could have just cut off the 2 smaller clamps on the hoses going to the valve covers. Take your time here and cut slowly so that you don't cut into the hoses.

Here is the factory "T" removed. You can see that I have also plugged the inlet going into the turbo. I used a 7/8" barstool endcap for a tight fit and held it in place with a hose clamp.



Here is the new 5/8" "T" fitting installed with the heater hose.




Now route the heater hose down to the frame rail and secure with cable ties. Trim to length. Some people have also added or made their own catch can to route the end of the house into. I may do this in the future.

You should not see any oil leaking out of the heater hose but some oily residue on the end is to be expected.

Here is everything secured and buttoned up.




Now be sure to save the factory "T", hose going to the turbo and spring clamp. You can reinstall these if needed at any time using the hose clamps you purchased.
 

Last edited by Johnny Cetane; 07-20-2008 at 04:19 PM.
The following 5 users liked this post by Johnny Cetane:
2500HeavyDuty (07-20-2008), 0Diesel Dawgs Performance (07-26-2008), JS2TZU (11-06-2008), Oilfield_Mafia (07-26-2008), trashygasman (10-07-2008)
  #2  
Old 07-20-2008, 04:44 PM
2500HeavyDuty's Avatar
Super Moderator
Join Date: Oct 2007
Location: Houston, Tx
Posts: 14,872
Received 760 Likes on 624 Posts
Default

 
The following users liked this post:
Johnny Cetane (07-20-2008)
  #3  
Old 07-26-2008, 01:19 PM
DangerousDuramax's Avatar
BOMBARDIER
Join Date: Apr 2007
Location: Houston, Tx
Posts: 6,804
Received 319 Likes on 271 Posts
Default

You actually dont need to cut the junction "T" off. A 5/8" heater hose will fit perfectly on the OD of the inner tube. That way you can easily put it back to stock if you get rid of the truck.
 
  #4  
Old 07-26-2008, 02:14 PM
Oilfield_Mafia's Avatar
Diesel Bomber
Join Date: May 2008
Location: Worlds Highest Hill
Posts: 2,850
Received 263 Likes on 211 Posts
Default

What does this do for the truck? Will it throw any codes if I dont have the finger stick? Also, will this work on the LBZ? Thanks!
 
  #5  
Old 07-26-2008, 02:17 PM
DangerousDuramax's Avatar
BOMBARDIER
Join Date: Apr 2007
Location: Houston, Tx
Posts: 6,804
Received 319 Likes on 271 Posts
Default

This vents your crank case gases to atmosphere instead of pumping them right back into the turbo and through the CAC. If you look at your lower boots you'll see some oil residue where its leaking from being forced through the CAC because of the PCV system.
 
  #6  
Old 07-26-2008, 02:20 PM
Oilfield_Mafia's Avatar
Diesel Bomber
Join Date: May 2008
Location: Worlds Highest Hill
Posts: 2,850
Received 263 Likes on 211 Posts
Default

But isnt a lil bit of oil good for lubricating the turbo? What does this help? just prolong the life of the turbo?
 
  #7  
Old 07-26-2008, 02:23 PM
DangerousDuramax's Avatar
BOMBARDIER
Join Date: Apr 2007
Location: Houston, Tx
Posts: 6,804
Received 319 Likes on 271 Posts
Default

NO!! This is pumping it through the intake side of the turbo and forcing it through your intercooler system. This is actually detrimental to the turbo not to mention your entire CAC system. It builds up oil and soot through-out the entire system.
 
  #8  
Old 07-26-2008, 02:25 PM
2500HeavyDuty's Avatar
Super Moderator
Join Date: Oct 2007
Location: Houston, Tx
Posts: 14,872
Received 760 Likes on 624 Posts
Default

As you can see in this picture



The oil would follow the T and drop in to the intake side of the turbo like DD said
 
  #9  
Old 07-26-2008, 02:26 PM
Oilfield_Mafia's Avatar
Diesel Bomber
Join Date: May 2008
Location: Worlds Highest Hill
Posts: 2,850
Received 263 Likes on 211 Posts
Default

oh dang! looks like I need to get this done on the LBZ.. Thanks for the info!
 
  #10  
Old 07-26-2008, 02:28 PM
Join Date: Mar 2007
Location: Western NC
Posts: 14,546
Received 843 Likes on 695 Posts
Default

Excellent
 
The following users liked this post:
Johnny Cetane (07-28-2008)

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.