[Zmagnette] engine rebuild question

[laverda at aol.com]

Buckey
In my experience the rocker towers and not made in sets. So they do not have all the bores at the same height. Ideally you should be able to slide the rocker shaft into the pedestal's easily after they are torqued to specification. In reality I doubt you will be able to get them in at all. Shimming and aligning the towers will help, but it is time consuming and hard to get them so the shaft will just slide in. I may to fussy but the reality is the support towers should be at least close to keep for stressing the shaft. I also like to swap rockers around and shim them to get them, so they are not so far off center on the valve stem. This helps prevent side loads on the valve guides. You do not want them perfectly centered so the valves rotate slightly under use.
Steve C
 
 
-----Original Message-----
From: webuck1 <webuck1 at cox.net>
To: Edward Brorein <edbro03 at yahoo.com>; List for the Z Magnette Group - North America <zmagnette at autox.team.net>
Sent: Sat, May 31, 2014 12:37 am
Subject: Re: [Zmagnette] engine rebuild question


OK. One more question, Do I need the shim for the middle rocker pedestal?
Buckey
---- Edward Brorein <edbro03 at yahoo.com> wrote: 
> Hi Buckey,
 
I am guessing you are referring to a Moss catalog, MGA by chance?
 
Anyway, there is only on locating screw and lockplate to hold the rocker shaft, 
which go on the end rocker assembly pedestal. There is a corresponding hole 
drilled in the rocker shaft that the nose of the locating screw goes into. No 
lockplates or screws on the other pedestals.
 
Ed


________________________________
From: "webuck1 at cox.net" <webuck1 at cox.net>
To: "zmagnette at autox.team.net" <zmagnette at autox.team.net> 
Sent: Tuesday, May 27, 2014 1:46 PM
Subject: [Zmagnette] engine rebuild question


OK. I am 99.9% done with my rebuild. Here is my question for you rebuilders:
The head has a screw in part called screw- rocker shaft locating (on pg. 10, #92 
of catalogue spring/summer 2014). The other three push in pieces that look the 
same as the screw are missing. Do I : 
A) Buy three screws and grind to push fit,
B) just use a washer and nut with no  lock plate piece # 91, as above.
What say you.
Buckey in hot AZ.
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