valve cover plumbing (PVC)
Thread Starter
Pro
Joined: Feb 2006
Posts: 718
Likes: 7
From: Jacksonville , NC
valve cover plumbing (PVC)
In anticipation of installing my upgrades, one of which is new aluminum valve covers, I want to make sure that I have everything I need. ( grommets, breathers, etc ) New valve covers have no acc holes and I will have to drill what I need. My question is what are my options for PCV plumbing and breather requirments. I will be using my stock L82 dual air cleaner set up with PCV port. Current stock finned aluminum covers have PCV port on one and oil fill and breather on the other. Should I just replicate this set up or is there an alternate plumbing that will work. Thanks again for any input.
Last edited by rclinton; Oct 16, 2007 at 09:57 PM.
Team Owner
Joined: Jul 1999
Posts: 65,492
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From: Orange Park Florida
Replicate what you got, but your largest problem is that oil separation baffle inside that cover, to limit the amount of oil getting into the PCV valve, it's a huge issue with many engines, not just old ones....
honestly, I recommend sticking with the stockish type covers that have all that allready done...get them powder coated if you want, which is what I did....makes life simpler....
honestly, I recommend sticking with the stockish type covers that have all that allready done...get them powder coated if you want, which is what I did....makes life simpler....
Thread Starter
Pro
Joined: Feb 2006
Posts: 718
Likes: 7
From: Jacksonville , NC
Thanks, Not sure I can use the stock covers with my new roller rockers. I am sure that there are no baffles in the original covers I have on now. So are you saying I should install baffles in the new covers? It is easy enough to drill and install grommets for the breather and PCV valve, just didnt know if it was required. Thanks again, Im ordering the parts needed.
Last edited by rclinton; Oct 16, 2007 at 09:58 PM.
Team Owner
Joined: Oct 2004
Posts: 23,831
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From: Springfield MO
St. Jude Donor '07
Just as a reference, parts stores might have trouble finding PVC...you tend to go to a hardware store for that stuff. The emissions system is Positive Crankcase Ventilation. 
PolyVinyl Chloride is a type of plastic often used for making pipes.
PolyVinyl Chloride is a type of plastic often used for making pipes.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Yeh man, but we can put it in our pipe and smoke it.....ONCE.....
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
Replicate what you got, but your largest problem is that oil separation baffle inside that cover, to limit the amount of oil getting into the PCV valve, it's a huge issue with many engines, not just old ones....
honestly, I recommend sticking with the stockish type covers that have all that allready done...get them powder coated if you want, which is what I did....makes life simpler....
honestly, I recommend sticking with the stockish type covers that have all that allready done...get them powder coated if you want, which is what I did....makes life simpler....
Drifting
Joined: Mar 2006
Posts: 1,526
Likes: 2
From: Oak Ridge NC
Thanks, Not sure I can use the stock covers with my new roller rockers. I am sure that there are no baffles in the original covers I have on now. So are you saying I should install baffles in the new covers? It is easy enough to drill and install grommets for the breather and PVC valve, just didnt know if it was required. Thanks again, Im ordering the parts needed.
You need a baffle...or your next thread might be titled "Where is my oil going?" IMHO
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Thread Starter
Pro
Joined: Feb 2006
Posts: 718
Likes: 7
From: Jacksonville , NC
Now you guys have me thinking...I definitly do NOT have a baffle in the stock L82 aluminum finned valve covers, dont remember losing oil over the years, but maybe someone can confirm that there are suposed to be baffles in the cast aluminum finned valve covers.
Thread Starter
Pro
Joined: Feb 2006
Posts: 718
Likes: 7
From: Jacksonville , NC
Thanks, as usual Batman your posts are most informative.
Drifting
Joined: Dec 2002
Posts: 1,861
Likes: 2
From: New Zealand
You can buy grommets with foam baffles that the PCV valve or breather will fit into...check Summit.....
Sometimes the baffles are simply a metal plate screwed to the underside of the hole.......if your lucky, your new valve covers might have tabs to accept the screws so you can attach a metal plate....
There's lots of breathers and grommets, and it's time consuming figuring out all the ID's & OD's.....just make sure you order the parts & measure before you drill
I gave up trying to find a twist on breather w/PCV, so I got an engineer to make up a custom fitting....
Good luck
Sometimes the baffles are simply a metal plate screwed to the underside of the hole.......if your lucky, your new valve covers might have tabs to accept the screws so you can attach a metal plate....
There's lots of breathers and grommets, and it's time consuming figuring out all the ID's & OD's.....just make sure you order the parts & measure before you drill
I gave up trying to find a twist on breather w/PCV, so I got an engineer to make up a custom fitting....
Good luck
Thread Starter
Pro
Joined: Feb 2006
Posts: 718
Likes: 7
From: Jacksonville , NC
You can buy grommets with foam baffles that the PCV valve or breather will fit into...check Summit.....
Sometimes the baffles are simply a metal plate screwed to the underside of the hole.......if your lucky, your new valve covers might have tabs to accept the screws so you can attach a metal plate....
There's lots of breathers and grommets, and it's time consuming figuring out all the ID's & OD's.....just make sure you order the parts & measure before you drill
I gave up trying to find a twist on breather w/PCV, so I got an engineer to make up a custom fitting....
Good luck
Sometimes the baffles are simply a metal plate screwed to the underside of the hole.......if your lucky, your new valve covers might have tabs to accept the screws so you can attach a metal plate....
There's lots of breathers and grommets, and it's time consuming figuring out all the ID's & OD's.....just make sure you order the parts & measure before you drill
I gave up trying to find a twist on breather w/PCV, so I got an engineer to make up a custom fitting....
Good luck
