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Re: [Fot] Rear Main Cap

To: Scott Janzen <sjanzen@me.com>
Subject: Re: [Fot] Rear Main Cap
From: Rod Pierce via Fot <fot@autox.team.net>
Date: Sat, 18 Mar 2023 15:09:25 -0400
Cc: 'Friends of Triumph' Triumph <fot@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <387882807.1976229.1679159579396@mail.yahoo.com> <2F272D05-1CFE-4F6E-93A9-ACB268E4CF11@me.com>
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So are you saying the lack of line honing would cause the bearing offset?

 Supposedly this block was line honed.

On Sat, Mar 18, 2023, 2:10 PM Scott Janzen via Fot <fot@autox.team.net>
wrote:

> One of the mysteries of a big batch of GT6 parts and cars i picked up som=
e
> years ago was a box of 50+(!) main caps, which i still have.
> Also got two blocks (with no caps), but why would anyone separate all
> these?  Nothing to do but laugh when i discovered them.
> Box makes a nice heavy doorstop.
>
> Sent from my iPhone
>
> On Mar 18, 2023, at 6:27 PM, ralph hansen via Fot <fot@autox.team.net>
> wrote:
>
> =EF=BB=BF
> main caps are machined as a set to the block itself - if you need to
> replace a cap, good luck finding a cap with the grooves lining up / if yo=
u
> do get lucky you'll need to get the block and caps line bored to make it
> all work properly
>
>
> On Saturday, March 18, 2023 at 08:26:23 AM CDT, Rod Pierce via Fot <
> fot@autox.team.net> wrote:
>
>
> The image shows the rear main cap and bearing on a small journal 1300.
>
> As you can see, there is an offset between the two bearing halves.
>
> I was attempting to mix and match parts from my parts bin.
>
> I'm curious about the source of the offset.  Is there a difference in end
> caps from year to year on the 1300 or is there a difference from engine t=
o
> engine when they were manufactured?
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<div dir=3D"auto">So are you saying the lack of line honing would cause the=
 bearing offset?=C2=A0<div dir=3D"auto"><br></div><div dir=3D"auto">=C2=A0S=
upposedly this block was line honed.</div></div><br><div class=3D"gmail_quo=
te"><div dir=3D"ltr" class=3D"gmail_attr">On Sat, Mar 18, 2023, 2:10 PM Sco=
tt Janzen via Fot &lt;<a href=3D"mailto:fot@autox.team.net";>fot@autox.team.=
net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto=
">One of the mysteries of a big batch of GT6 parts and cars i picked up som=
e years ago was a box of 50+(!) main caps, which i still have.<div>Also got=
 two blocks (with no caps), but why would anyone separate all these?=C2=A0 =
Nothing to do but laugh when i discovered them.</div><div>Box makes a nice =
heavy doorstop.<br><br><div dir=3D"ltr">Sent from my iPhone</div><div dir=
=3D"ltr"><br><blockquote type=3D"cite">On Mar 18, 2023, at 6:27 PM, ralph h=
ansen via Fot &lt;<a href=3D"mailto:fot@autox.team.net"; target=3D"_blank" r=
el=3D"noreferrer">fot@autox.team.net</a>&gt; wrote:<br><br></blockquote></d=
iv><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div style=3D"font-f=
amily:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><div></div>
        <div dir=3D"ltr">main caps are machined as a set to the block itsel=
f - if you need to replace a cap, good luck finding a cap with the grooves =
lining up / if you do get lucky you&#39;ll need to get the block and caps l=
ine bored to make it all work properly</div><div dir=3D"ltr"><br></div><div=
><br></div>
       =20
        </div><div id=3D"m_4678317641249648023ydpb811c912yahoo_quoted_94522=
91401">
            <div style=3D"font-family:&#39;Helvetica Neue&#39;,Helvetica,Ar=
ial,sans-serif;font-size:13px;color:#26282a">
               =20
                <div>
                    On Saturday, March 18, 2023 at 08:26:23 AM CDT, Rod Pie=
rce via Fot &lt;<a href=3D"mailto:fot@autox.team.net"; target=3D"_blank" rel=
=3D"noreferrer">fot@autox.team.net</a>&gt; wrote:
                </div>
                <div><br></div>
                <div><br></div>
                <div><div id=3D"m_4678317641249648023ydpb811c912yiv28933728=
26"><div>The image shows the rear main cap and bearing on a small journal 1=
300.<div><br></div><div>As=C2=A0you can see, there is an offset between the=
 two bearing halves.=C2=A0</div><div><br></div><div>I was attempting to mix=
 and match parts from my parts bin.</div><div><br></div><div>I&#39;m curiou=
s about the source of the offset.=C2=A0 Is there a difference in end caps f=
rom year to year on the 1300 or is there a difference from engine to engine=
 when they were manufactured?</div></div>
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</blockquote></div>

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