Shims under the rocker pedestals is okay until you mill a BUNCH off the head
like I did most of the time..then you can expect a change in change the
rocker geometry and the shims are working the wrong way with the wipe on the
stem being off center.
From: <WEmery7451@aol.com>
To: <GuyotLeonF@aol.com>; <kaskas@earthlink.net>
Cc: <fot@autox.team.net>
Sent: Monday, December 03, 2001 9:54 AM
Subject: Re: 6 cylinder pushrod length required
> In a message dated 12/2/01 4:26:52 PM Pacific Standard Time,
> GuyotLeonF@aol.com writes:
>
> << The tubeular pushrods are produced with an insert ball and cup that has
a
> > portion that goes up into the tube. This is NOT welded in place but
simply
> > pressed in. SO.......you can pull out the insert and shorten the
pushrod
> > as you need then just press the insert back into place. I generally did
> > this in a lathe using a parting tool and therefore did not have to
remove
> > the insert I just tooled off a bit of materiel right up next to the
insert
> > joint, tested it for length and then went on as needed, recording as
you go
> > and then make all the rest the same length. It's just not a big deal.
>>
>
> I went through this process as a government job at the old Shippingport
> Experimental Nuclear Plant in 1966. I just used the first step explained
in
> Kas's little black book. The machinist used a parting tool, and tapped
the
> rod cap down into the tube. No, I never checked to see if the rods ended
up
> being radioactive.
>
> If I remember correctly, Ken G's BFE company use to furnish these push
rods
> in different lengths. He must have been in business for a long time.
> Yesterday, I found an ancient pack of steel shim head gaskets in my garage
> with his California address. Many years ago, I tried to order some more
> gaskets from this address, and was notified that he wasn't there anymore.
>
> From Kas-Thanks: <<So this amounts to: subtract the diameter difference
from
> the
> amount milled from the head and that is how much to shorten. If you have
not
> milled much off the head you probably will not need to do anything.>>
>
> Regardless of the cam, amount milled off of the head, and push rod length,
I
> still normally end up adding some shims under the rocker pedestals.
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