the rocker cover bracket to facilitate air filter assembly
Here Jim Livingstone describes a procedure which helps avoid
the misalignment between the air filter and its mounting bracket
on the rocker cover and a revised bolt tightening sequence.
have all read the instruction beloved of the authors of Workshop
Manuals - "Reassemble in the reverse order of dismantling".
It is a quick and easy way to avoid repetition and effort and
in most cases it results in a perfectly satisfactory reassembly.
However, there are instances where a reversal of the dismantling
sequence is not satisfactory. Such a case is the reassembly
of the Air Filter Bracket to the Rocker Cover.
I had noticed on the rare occasions I had removed the Air Filter
centre bolt I always experienced difficulty refitting it. On
a casual inspection it looked like a case of inadequate taper
on the lead thread and I decided that a dog point* was the appropriate
solution. This, however, turned out to be an instance of lazy
analysis and only effected a partial cure. The true cause was
misalignment between the Air Filter and its Mounting Bracket
on the Rocker Cover caused
by the bracket being tightened in the wrong sequence during
a previous assembly. The MG designers
recognised the considerable tolerance stack up* between the
Air Filter and the Rocker Cover and had provided elongated holes
in the Mounting Bracket. The consequence of this was
if the bracket was reassembled to the Rocker Cover and prematurely
tightened it was likely to be in the wrong position.
There is another problem associated with the bracket's position
and that is if the bracket is positioned too close to the Rocker
Cover then the Air Filter bolt can contact the latter and cause
minor damage to the ribbing. The procedure which follows describes
an assembly sequence to avoid these issues.
Jim describes the revised bolt tightening procedure. procedure.
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