Valve spring/seal assitance please!

[Gary Wilkerson]

I'm having a problem with my 66 427/390 smoking after running about five minutes. It starts out very gradually then after about 10-15 minutes there is a noticable discharge. The smoke is a light blue and it only happens on the right bank.
I've pulled the valve cover on the right bank to replace valve seals. I assumed the majority of the problem was due to #8 exhaust as it has the most oil near or around it.
What I found amazed me. All of the springs except #8 exhaust had a single spring with a spiral (flat stock) spring on the inside and all had seals on them. Number 8 exhaust had two complete springs and no seal.
What should I do? I assume I should get the correct spring set (flatstock on inside) and put a seal on. If I just add a seal I could be causing undesirable cam wear because of to stiff of springs.
Is it possible someone did not install a seal because it interferes with the innner spring?

Any opinions or assistance is appreciated.

gary

[Clem Z.]

Re: Valve spring/seal assitance please!

the springs with the flat wound damper sound like the orignal 1966 springs and the double spring sounds like the GM replacement but the retainer should have a plastic umbrella type seal.the springs with flat wound dampers cut into the heads and retainers so i would change them all to GM part# 12371061 for 16 springs and as posted below should include the retainers

[Gary Wilkerson]

Re: Valve spring/seal assitance please!

Clem,

Thanks for our advice! The part number you mentioned in the other post (GM part# 12371061)does that include the innner spring, outer spring, retainer and seal?

Also I'm a little confused about the discussion of seal types in the other thread as well. All of the other valve have only the plastic umbrella type seal. Is there some other seal thats supposed to be installed other than the umbrella seal?

Gary

[Clem Z.]

Re: Valve spring/seal assitance please!

the plastic umbrella seal is the GM type. if you only need one spring and retainer the part # is 3970627 for the spring and the part# for the retainer is 3964264. the part# 12371061 is for 16 springs and retainers with the plastic umbrella type seal. the plastic umbrella seal should be fine as long as your valve gudes are not worn.no other seal is required if you use the retainer with the plastic umbrella seal.

[Gary Wilkerson]

Thanks!! *NM*