Need Valvetrain Help
Thread Starter
Racer
Joined: Jul 2011
Posts: 455
Likes: 0
From: Dalton GA
Need Valvetrain Help
98 Vette with stock 806 heads with 100K and VRX5 cam, TEA Dual Gold Springs, and full bolt ons.
Ok well I went through this whole smoking and burning oil thing before to find out the valve seals did not seat correctly and had rose to the top of the valve stem. So I replaced the seals thinking that was a for sure fix. I go to change my intake today to my new bought LS6 intake to find that I have oil sitting on the tops of my valves. Every intake valve is closed has oil puddling up on the valves. And I some some weird scarring inside the head where the valve is.
So I came home tonight after work thinking that i would find all my valve seals sitting at the top again. I pulled the valve covers and check all the seals to find them still seated. So what is my problem. This isn't normal and it didn't start happening until I installed my cam.
Ok well I went through this whole smoking and burning oil thing before to find out the valve seals did not seat correctly and had rose to the top of the valve stem. So I replaced the seals thinking that was a for sure fix. I go to change my intake today to my new bought LS6 intake to find that I have oil sitting on the tops of my valves. Every intake valve is closed has oil puddling up on the valves. And I some some weird scarring inside the head where the valve is.
So I came home tonight after work thinking that i would find all my valve seals sitting at the top again. I pulled the valve covers and check all the seals to find them still seated. So what is my problem. This isn't normal and it didn't start happening until I installed my cam.
Thread Starter
Racer
Joined: Jul 2011
Posts: 455
Likes: 0
From: Dalton GA
I have another question. I installed the catch can before I got my cam and it took care of the small blow by that was getting into the intake. But when I did install it I cracked the line behind the PCV Valve and just cut the plastic line and just put a piece of rubber hose on and deleted the PCV Valve. Could this be my problem?
Le Mans Master
Joined: Nov 2009
Posts: 6,119
Likes: 156
From: Huntington tx
Check my reply at the LS1tech forum you posted about this. I had the same exact issue and solved it. First I replaced the valve stem seals myself, but I the same problem later in a few days. I thought my engine needed a rebuild, but when I pulled the intake manifold I saw oil pooled on top of the intake valves. I knew then that the valve stem seals or valve guides were a problem. So I had my 806 heads reworked and new valve stem seals solved the same issue with mine. Valve guides were perfect so the machine shop said that the valve stem seals were still split(even though they were new), anyway they installed them this time and the car is perfect today...so they knew what to fix!
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
Yes sounds like it is PCV related--- When installing a catch can or LS6 valley and re-plumbing your PVC system often times the vacuum can suck the PCV hoses FLAT--and the PCV system can't suck or vent---I had this problem and had to replace all my hoses with hi-pressure (blue lined ) fuel hose---It has a plastic inner liner that won't suck flat-
What worked best for me was to vent the drivers side valve cover to atmosphere with a small K&N style breather--and unplug the pass side hose on the T-body --cap it --and install another breather on that hose to that side---Now you have vented BOTH sides of the engine to atmoshere--Its not smog legal so you may have to return it back to stock trim when smogging- this gives you NO restriction on the inlet side of the PCV--
Then make sure on the vacuum side of the PCV system the hoses don't flatten out--
A non working PCV system will make it smoke -and your rings won't seal well---
Also--- you gotta have a PCV valve--- !!!!!!!!! It contols the amount of vacuum under differnet engine loads--You can't have full vacuum all the time or it will suck up tons of oil and oil vapor
What worked best for me was to vent the drivers side valve cover to atmosphere with a small K&N style breather--and unplug the pass side hose on the T-body --cap it --and install another breather on that hose to that side---Now you have vented BOTH sides of the engine to atmoshere--Its not smog legal so you may have to return it back to stock trim when smogging- this gives you NO restriction on the inlet side of the PCV--
Then make sure on the vacuum side of the PCV system the hoses don't flatten out--
A non working PCV system will make it smoke -and your rings won't seal well---
Also--- you gotta have a PCV valve--- !!!!!!!!! It contols the amount of vacuum under differnet engine loads--You can't have full vacuum all the time or it will suck up tons of oil and oil vapor
