Hi Lin,
Oddly the thread in the rocker pedestal is not a standard UNF 3/8 24 t.p.i.
but is actually 3/8 x 28 t.p.i.!!!
The correct tap for this thread is relatively readily available and with
this you can cut a new thread in any of the other pedestals and move it to
the feed position; however it is essential that the threaded hole is
carefully positioned and drilled and tapped at the correct angle or it just
won't work.
I notice that Moss Motors have the tapped pedestal for about $30 which is
probably by far the best way to go.
Michael Salter
www.precisionsportscar.com
-----Original Message-----
From: owner-healeys@autox.team.net [mailto:owner-healeys@autox.team.net] On
Behalf Of linwood rose
Sent: Sunday, October 22, 2006 11:54 AM
To: list healey
Subject: threaded rocker pedestal
Someone on a previous engine rebuild must have secured the oil feed
pipe banjo bolt on my motor after the assembly was installed to the
head because the pedestal threads are pretty badly stripped. I figure
my choices are to buy a new pedestal (I am having the assembly
rebuilt by Rocker Arm Specialists) or to put a 3/8" helicoil in the
pedestal and fabricate a new banjo bolt. Since a new pedestal seems
to be less expensive than the minimum charge from a machine shop I am
tempted to just buy the new pedestal. However, having run into
several instances where new parts do not fit properly I am hesitant.
Anyone have any experience with this one? Any vendor issues of which
I should be aware? If you would rather let me know off-list please
do. Thanks as always.
Lin
1960 BT7 in restoration
1959 Bugeye
|