Rick, this was from an engine site I found.......
Chevy's specification for the rocker arm nuts are 1 turn down after zero lash
is achieved. That's one complete turn after all ticking is gone. You must turn
them slowly as the engine will run a little rough until the lifter bleeds down.
I would suggest turning all valves to zero lash, no ticking. Then turn all
valves a ¼ turn and let it recover. Keep doing this until all are 1 turn or
360°.
----- Original Message -----
From: Rick Schaefer
To: The Chevelle Mailing List
Sent: Sunday, May 10, 2009 10:52 PM
Subject: Re: [Chevelle-list] Valve Seal Replacement ?
Thanx all. I had to search all over town for the correct seals. City of
100K with how many chevy/gmc pickups and no one stocks the O-Ring seals. Well
almost no one. I did 1 cylinder just to get the hang of it & frankly it was
pretty easy. I took a bit of time to get the hang of the Lisle Valve Spring
Tool but its really simple to use. I had to spend time with Mom today but
I'll finish in the AM.
BTW - Speaking of valve adjustment: Is 1/4 turn after slop is out of
pushrod/rocker enough of a preload. Hydraulic roller lifters.
On Sun, May 10, 2009 at 10:37 AM, Dan Anderson <dbasd...@yahoo.com> wrote:
You are totally correct. What was I thinking? I guess I just zeroed
in on "adjust valves".
--- On Sun, 5/10/09, Tom Rightler <bluess...@comcast.net> wrote:
From: Tom Rightler <bluess...@comcast.net>
Subject: Re: [Chevelle-list] Valve Seal Replacement ?
To: "The Chevelle Mailing List" <chevelle-list@chevelles.net>
Date: Sunday, May 10, 2009, 6:35 AM
That may work if you already have them adjusted, but if you do it
that way initially after having the rocker arms off, you might damaged the
lifters or the camshaft. If the rockers are too tight, you risk wiping out cam
lobes.
Tom Rightler
MCC Newsletter Editor
----- Original Message -----
From: Dan Anderson
To: The Chevelle Mailing List
Sent: Saturday, May 09, 2009 10:32 PM
Subject: Re: [Chevelle-list] Valve Seal Replacement ?
I like to adjust the valves with the motor warm and
running. Back each one off, one at a time, then tighten 1/4 turn past when
they stop clattering. An old valve cover with the top cut off comes in handy.
They used to sell clips that attached to the rockers and plugged the push rods
to keep the mess down. You can do each side in about a minute that way.
--- On Fri, 5/8/09, Tom Rightler <bluess...@comcast.net>
wrote:
From: Tom Rightler <bluess...@comcast.net>
Subject: Re: [Chevelle-list] Valve Seal Replacement ?
To: "The Chevelle Mailing List"
<chevelle-list@chevelles.net>
Date: Friday, May 8, 2009, 6:20 PM
You don't need to bring each cylinder up. The pressure
from the hose is plenty to keep up. Bring #1 up so it so it's on the firing
position before you do anything and leave the engine rest there. Makes it much
easier to readjust the valves once you're done. It's a pretty straightforward
job. Should take about an hour. When you remove the rocker arms and have the
tool in place, compress the spring, pull the keepers off, then release the
spring. Pull it off, pull old seal off, then slide the new seal on, reverse
the procedure, and your done. Just make sure you adjust the valves
properly....there is a specific sequence.
Tom Rightler
MCC Newsletter Editor
----- Original Message -----
From: Rick Schaefer
To: chevelle-list@chevelles.net
Sent: Friday, May 08, 2009 9:07 PM
Subject: [Chevelle-list] Valve Seal Replacement ?
I am going to attempt to replace the valve seals on
my 350 this weekend. I've never messed with heads at all, but am thinking it
can't be too difficult.
I have an air hose adapter to keep the valves in
place and bought a valve spring compressing tool at Pate last weekend.
I'll bring each cylinder to TDC, apply air, and use
the tool to compress the spring and remove retainer & keepers.
I am assuming that the seals just slide over the
valves.
Is there anything more to it than that? Any
Gotchas? Do I lubricate the seals before sliding over the valve stem? Are
the keepers easy to align when I reassemble? I googled Valve seal
replacement & didn't find much to help. Anyone know of a web site with
pictures?
Thanx
--
Rick Schaefer
72 TPI El Camino
--
Rick Schaefer
72 TPI El Camino
