Subject: [Fot] Rear Main Cap

From: Rod Pierce via Fot <[email-masked]>
Date: Sat, 18 Mar 2023 09:09:32 -0400

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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 to
engine when they were manufactured?

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<div dir=3D"auto">The image shows the rear main cap and bearing on a small =
journal 1300.<div dir=3D"auto"><br></div><div dir=3D"auto">As=C2=A0you can =
see, there is an offset between the two bearing halves.=C2=A0</div><div dir=
=3D"auto"><br></div><div dir=3D"auto">I was attempting to mix and match par=
ts from my parts bin.</div><div dir=3D"auto"><br></div><div dir=3D"auto">I&=
#39;m curious about the source of the offset.=C2=A0 Is there a difference i=
n end caps from year to year on the 1300 or is there a difference from engi=
ne to engine when they were manufactured?</div></div>

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_______________________________________________
[email-masked]

http://www.fot-racing.com

Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot

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From: Charly via Fot <[email-masked]>
Date: Sat, 18 Mar 2023 15:00:59 -0500

Do you have it on backward?
What happens if you flip it 180° ?
Charly Mitchel
TR6 #44
On Sat 18/03/23  7:56 AM , Rick Parent via Fot [email-masked] sent:
> Never, ever change caps without align honing, you can swap bearing
> though.
> Rick Parent
> "_Doing the right thing is always the right thing, regardless of
> consequences_ "
> On Saturday, March 18, 2023 at 06:21:25 AM MST, Rod Pierce via Fot
> wrote:  
> 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 to engine when they were manufactured?
> http://www.fot-racing.com [1]
> 
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From: Bob Kramer Gmail via Fot <[email-masked]>
Date: Sun, 19 Mar 2023 09:30:51 -0500

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I was successful in finding a closely matched set for a TR4 block and was ab=
le to get it align bored. We learned the the plane the crankshaft was on was=
 off a bit from the plane that the deck and figure 8=E2=80=99s had, and diff=
erent from the oil pan surface as well.=20

Sent from my iPhone

> On Mar 18, 2023, at 5:15 PM, Rod Pierce via Fot <[email-masked]> wrote=
:
>=20
> =EF=BB=BF
> Based on how far off the bearing is offset, I wanted to rule out differenc=
es in model years for the 1300.
>=20
> It seems the answer to my original question is that there was considerable=
 variation in engines that came off the assembly line when these cars were m=
ade.
>=20
> Solid evidence of why you don't mismatch bearing caps!
>=20
> Thanks for the input.
>=20
>> On Sat, Mar 18, 2023, 4:44 PM Rick Parent <[email-masked]> wrote:
>> No, you can't fix that without finding a better cap that matches the groo=
ve in the block. I just mentioned the align hone because of the weird lookin=
g bearing wipe on the left side of the cap.
>>=20
>> Rick Parent
>>=20
>> "Doing the right thing is always the right thing, regardless of consequen=
ces"
>>=20
>>=20
>>=20
>> On Saturday, March 18, 2023 at 12:38:52 PM MST, Rod Pierce via Fot <fot@a=
utox.team.net> wrote:
>>=20
>>=20
>> So are you saying the lack of line honing would cause the bearing offset?=
=20
>>=20
>>  Supposedly this block was line honed.
>>=20
>> On Sat, Mar 18, 2023, 2:10 PM Scott Janzen via Fot <[email-masked]> w=
rote:
>> 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 the=
se?  Nothing to do but laugh when i discovered them.
>> Box makes a nice heavy doorstop.
>>=20
>> Sent from my iPhone
>>=20
>>>> On Mar 18, 2023, at 6:27 PM, ralph hansen via Fot <[email-masked]> w=
rote:
>>>>=20
>>> =EF=BB=BF
>>> main caps are machined as a set to the block itself - if you need to rep=
lace a cap, good luck finding a cap with the grooves lining up / if you do g=
et lucky you'll need to get the block and caps line bored to make it all wor=
k properly
>>>=20
>>>=20
>>> On Saturday, March 18, 2023 at 08:26:23 AM CDT, Rod Pierce via Fot <fot@=
autox.team.net> wrote:
>>>=20
>>>=20
>>>=20
>>> As you can see, there is an offset between the two bearing halves.=20
>>>=20
>>>=20
>>> I'm curious about the source of the offset.  Is there a difference in en=
d caps from year to year on the 1300 or is there a difference from engine to=
 engine when they were manufactured?
>>>=20
>>>=20
>>> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot=

>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/quikrx@yah=
oo.com
>>>=20
>>>=20
>>>=20
>>>=20
>>> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot=

>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/sjanzen@me=
.com
>>>=20
>>>=20
>>=20
>>=20
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/rpierce141@=
gmail.com
>>=20
>>=20
>>=20
>>=20
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/rick.parent=
@att.net
>>=20
>>=20
>=20
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/rkramer56@gm=
ail.com
>=20
>=20

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">I was successful in finding a closely match=
ed set for a TR4 block and was able to get it align bored. We learned the th=
e plane the crankshaft was on was off a bit from the plane that the deck and=
 figure 8=E2=80=99s had, and different from the oil pan surface as well.&nbs=
p;<br><br><div dir=3D"ltr">Sent from my iPhone</div><div dir=3D"ltr"><br><bl=
ockquote type=3D"cite">On Mar 18, 2023, at 5:15 PM, Rod Pierce via Fot &lt;f=
[email-masked]&gt; wrote:<br><br></blockquote></div><blockquote type=3D"c=
ite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"auto"><div dir=3D"auto">Based on h=
ow far off the bearing is offset, I wanted to rule out differences in model y=
ears for the 1300.</div><div dir=3D"auto"><br></div>It seems the answer to m=
y original question is that there was considerable variation in engines that=
 came off the assembly line when these cars were made.<div dir=3D"auto"><br>=
</div><div dir=3D"auto">Solid evidence of why you don't mismatch bearing cap=
s!</div><div dir=3D"auto"><br></div><div dir=3D"auto">Thanks for the input.<=
/div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_at=
tr">On Sat, Mar 18, 2023, 4:44 PM Rick Parent &lt;<a href=3D"mailto:rick.par=
[email-masked]">[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D=
"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-=
left:1ex"><div><div style=3D"font-family:Helvetica Neue,Helvetica,Arial,sans=
-serif;font-size:16px"><div><div dir=3D"ltr">No, you can't fix that without f=
inding a better cap that matches the groove in the block. I just mentioned t=
he align hone because of the weird looking bearing wipe on the left side of t=
he cap.</div><div><br></div><div><div style=3D"font-family:Helvetica,Arial,s=
ans-serif;font-size:16px"><div dir=3D"ltr">Rick Parent</div><div dir=3D"ltr"=
><br></div><div dir=3D"ltr">"<i>Doing the right thing is always the right th=
ing, regardless of consequences</i>"</div><div dir=3D"ltr"><br></div></div><=
/div></div>
        <div><br></div><div><br></div>
       =20
        </div><div id=3D"m_-7430944598904451771yahoo_quoted_9861563092">
            <div style=3D"font-family:'Helvetica Neue',Helvetica,Arial,sans-=
serif;font-size:13px;color:#26282a">
               =20
                <div>
                    On Saturday, March 18, 2023 at 12:38:52 PM MST, Rod Pier=
ce via Fot &lt;<a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D=
"noreferrer">[email-masked]</a>&gt; wrote:
                </div>
                <div><br></div>
                <div><br></div>
                <div><div id=3D"m_-7430944598904451771yiv7329090762"><div><d=
iv>So are you saying the lack of line honing would cause the bearing offset?=
&nbsp;<div><br clear=3D"none"></div><div>&nbsp;Supposedly this block was lin=
e honed.</div></div><br clear=3D"none"><div><div id=3D"m_-743094459890445177=
1yiv7329090762yqt64227"><div dir=3D"ltr">On Sat, Mar 18, 2023, 2:10 PM Scott=
 Janzen via Fot &lt;<a rel=3D"nofollow noopener noreferrer noreferrer" shape=
=3D"rect" href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
m.net</a>&gt; wrote:<br clear=3D"none"></div><blockquote style=3D"margin:0 0=
 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>One of the mysteri=
es of a big batch of GT6 parts and cars i picked up some years ago was a box=
 of 50+(!) main caps, which i still have.<div>Also got two blocks (with no c=
aps), but why would anyone separate all these?&nbsp; Nothing to do but laugh=
 when i discovered them.</div><div>Box makes a nice heavy doorstop.<br clear=
=3D"none"><br clear=3D"none"><div dir=3D"ltr">Sent from my iPhone</div><div d=
ir=3D"ltr"><br clear=3D"none"><blockquote type=3D"cite">On Mar 18, 2023, at 6=
:27 PM, ralph hansen via Fot &lt;<a rel=3D"nofollow noopener noreferrer nore=
ferrer" shape=3D"rect" href=3D"mailto:[email-masked]" target=3D"_blank">=
[email-masked]</a>&gt; wrote:<br clear=3D"none"><br clear=3D"none"></blo=
ckquote></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div style=
=3D"font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><d=
iv></div>
        <div dir=3D"ltr">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 li=
ning up / if you do get lucky you'll need to get the block and caps line bor=
ed to make it all work properly</div><div dir=3D"ltr"><br clear=3D"none"></d=
iv><div><br clear=3D"none"></div>
       =20
        </div><div id=3D"m_-7430944598904451771yiv7329090762m_46783176412496=
48023ydpb811c912yahoo_quoted_9452291401">
            <div style=3D"font-family:'Helvetica Neue',Helvetica,Arial,sans-=
serif;font-size:13px;color:#26282a">
               =20
                <div>
                    On Saturday, March 18, 2023 at 08:26:23 AM CDT, Rod Pier=
ce via Fot &lt;<a rel=3D"nofollow noopener noreferrer noreferrer" shape=3D"r=
ect" href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
</a>&gt; wrote:
                </div>
                <div><br clear=3D"none"></div>
                <div><br clear=3D"none"></div>
                <div><div id=3D"m_-7430944598904451771yiv7329090762m_4678317=
641249648023ydpb811c912yiv2893372826"><div>The image shows the rear main cap=
 and bearing on a small journal 1300.<div><br clear=3D"none"></div><div>As&n=
bsp;you can see, there is an offset between the two bearing halves.&nbsp;</d=
iv><div><br clear=3D"none"></div><div>I was attempting to mix and match part=
s from my parts bin.</div><div><br clear=3D"none"></div><div>I'm curious abo=
ut the source of the offset.&nbsp; Is there a difference in end caps from ye=
ar to year on the 1300 or is there a difference from engine to engine when t=
hey were manufactured?</div></div>
</div>_______________________________________________<br clear=3D"none"><a r=
el=3D"nofollow noopener noreferrer noreferrer" shape=3D"rect" href=3D"mailto=
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