Subject: [Fot] TR intake gaskets

From: Lyman Scherer via Fot <[email-masked]>
Date: Tue, 8 Apr 2025 15:52:46 -0700

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Stock TR Moss Motors intake gasket. #1 intake port blow-out, #4 port did sam=
e blow-out weeks prior
No exhaust port leaks!!!
This is BajaTR3 engine that never had this issue, raced for years.
Difference: used existing TR4 intakes and headers. Clamping type in not stoc=
k TR. Probably the cause!
Are copper gasket available??
Or better recommendations ??
I can have gaskets made, just asking for experienced thoughts.
Cheers, Lyman S.

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Sent from my iPhone
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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: Philip Gott via Fot <[email-masked]>
Date: Wed, 9 Apr 2025 06:00:32 -0400

Lyman;
Are you certain that the manifold and head mounting surfaces are flat? We’ve seen this with manifolds that have warped a bit.
As Dave recommended earlier, the thicker high performance Remflex gaskets available from Moss or the even thicker ones from Brian at British Frame and Engine will accommodate some of this, but not all. The clamping force is low due to the need for the exhaust manifold to slide on the gasket and hence the limited bolt tightening torque recommended.
Hope this helps,
Phil Gott
Sent from my iPhone

> On Apr 8, 2025, at 7:01 PM, Lyman Scherer via Fot <[email-masked]> wrote:
> 
> Stock TR Moss Motors intake gasket. #1 intake port blow-out, #4 port did same blow-out weeks prior
> No exhaust port leaks!!!
> Difference: used existing TR4 intakes and headers. Clamping type in not stock TR. Probably the cause!
> Sent from my iPhone_______________________________________________
> [email-masked]
> 
> Donate: http://www.team.net/donate.html
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/[email-masked]
> 
> 

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From: vfracing--- via Fot <[email-masked]>
Date: Wed, 9 Apr 2025 10:55:46 +0000 (UTC)

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 Lyman;
Further to my earlier email: another possible cause is a mis match in the t=
hicknesses of the intake and exhaust manifold flanges. If they are not abou=
t the same, the bridges can hang up on the stud and appear to be tight but =
not really pressing on the flange. =C2=A0The cure for this is to either ope=
n up the hole in the bridge or weld some pedestals on the thinner flange. =
=C2=A0 Or a custom bridge....
Phil
    On Wednesday, April 9, 2025 at 06:23:46 AM EDT, Philip Gott via Fot <fo=
[email-masked]> wrote:  =20

 Lyman;
Are you certain that the manifold and head mounting surfaces are flat? We=
=E2=80=99ve seen this with manifolds that have warped a bit.
As Dave recommended earlier, the thicker high performance Remflex gaskets a=
vailable from Moss or the even thicker ones from Brian at British Frame and=
 Engine will accommodate some of this, but not all. The clamping force is l=
ow due to the need for the exhaust manifold to slide on the gasket and henc=
e the limited bolt tightening torque recommended.
Hope this helps,
Phil Gott
Sent from my iPhone

> On Apr 8, 2025, at 7:01=E2=80=AFPM, Lyman Scherer via Fot <[email-masked]=
.net> wrote:
>=20
> =EF=BB=BFStock TR Moss Motors intake gasket. #1 intake port blow-out, #4 =
port did same blow-out weeks prior
> Difference: used existing TR4 intakes and headers. Clamping type in not s=
tock TR. Probably the cause!
>=20
>=20
>=20
>=20
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/vfracing@ao=
l.com
>=20
>=20

com

 =20
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<html><head></head><body><div class=3D"ydpc0738470yahoo-style-wrap" style=
=3D"font-family:arial;font-size:16px;"><div></div>
        <div dir=3D"ltr" data-setdir=3D"false">Lyman;</div><div dir=3D"ltr"=
 data-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">Fur=
ther to my earlier email: another possible cause is a mis match in the thic=
knesses of the intake and exhaust manifold flanges. If they are not about t=
he same, the bridges can hang up on the stud and appear to be tight but not=
 really pressing on the flange. &nbsp;The cure for this is to either open u=
p the hole in the bridge or weld some pedestals on the thinner flange. &nbs=
p; Or a custom bridge....</div><div dir=3D"ltr" data-setdir=3D"false"><br><=
/div><div dir=3D"ltr" data-setdir=3D"false">Phil</div><div><br></div>
       =20
        </div><div id=3D"yahoo_quoted_4304176654" class=3D"yahoo_quoted"><d=
iv class=3D"yahoo-style-wrap" style=3D"font-family:arial;font-size:16px;">
            <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
               =20
                <div class=3D"quoted-text-header">
                        On Wednesday, April 9, 2025 at 06:23:46 AM EDT, Phi=
lip Gott via Fot &lt;[email-masked]&gt; wrote:
                    </div>
                </div><div style=3D"font-family:'Helvetica Neue', Helvetica=
, Arial, sans-serif;font-size:13px;color:#26282a;border-left: 1px solid #cc=
c;padding-left: 8px;margin: 0px 0px 0px 8px" class=3D"inline_reply_quote_co=
ntainer">
                <div><br></div><div><br></div>
                <div><div dir=3D"ltr">Lyman;<br clear=3D"none">Are you cert=
ain that the manifold and head mounting surfaces are flat? We=E2=80=99ve se=
en this with manifolds that have warped a bit.<br clear=3D"none">As Dave re=
commended earlier, the thicker high performance Remflex gaskets available f=
rom Moss or the even thicker ones from Brian at British Frame and Engine wi=
ll accommodate some of this, but not all. The clamping force is low due to =
the need for the exhaust manifold to slide on the gasket and hence the limi=
ted bolt tightening torque recommended.<br clear=3D"none">Hope this helps,<=
br clear=3D"none">Phil Gott<br clear=3D"none">Sent from my iPhone<br clear=
=3D"none"><br clear=3D"none">&gt; On Apr 8, 2025, at 7:01=E2=80=AFPM, Lyman=
 Scherer via Fot &lt;<a shape=3D"rect" ymailto=3D"mailto:[email-masked]=
" href=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrote:<br c=
lear=3D"none">&gt; <br clear=3D"none">&gt; =EF=BB=BFStock TR Moss Motors in=
take gasket. #1 intake port blow-out, #4 port did same blow-out weeks prior=
<br clear=3D"none">&gt; No exhaust port leaks!!!<br clear=3D"none">&gt; Thi=
s is BajaTR3 engine that never had this issue, raced for years.<br clear=3D=
"none">&gt; Difference: used existing TR4 intakes and headers. Clamping typ=
e in not stock TR. Probably the cause!<br clear=3D"none">&gt; Are copper ga=
sket available??<br clear=3D"none">&gt; Or better recommendations ??<br cle=
ar=3D"none">&gt; I can have gaskets made, just asking for experienced thoug=
hts.<br clear=3D"none">&gt; Cheers, Lyman S.<br clear=3D"none">&gt; <br cle=
ar=3D"none">&gt; <br clear=3D"none">&gt; &lt;IMG_8470.jpg&gt;<br clear=3D"n=
one">&gt; <br clear=3D"none">&gt; Sent from my iPhone______________________=
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ct" href=3D"http://www.fot-racing.com" target=3D"_blank">http://www.fot-rac=
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From: yellow04 via Fot <[email-masked]>
Date: Wed, 09 Apr 2025 08:33:40 -0400

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My money is on this one... Blowing out the bottom of the intake gaskets
means you didn't get nearly enough pressure (if any) from that pesky
lower mounting stud and clamp. I have found if you use anything other
than a stock intake manifold and stock exhaust manifold, you must
scrutinize the area where the clamps will sit to ensure the height is
very similar. Or, modify the clamps by welding on something to make sure
when the clamp rests on the appropriate bits of the intake and exhaust
manifold, when the nut is tightened it puts equal pressure on both
manifolds. Obviously, the mounting face on each manifold needs to be
flat. Assuming you have everything in order, there is no reason a stock
manifold gasket will not work, I have run them when I could not get my
hands on the HD gaskets and they worked fine for me.  

Last thought, the nuts that hold the manifolds on are notorious for
loosening up in time, and especially after the first few heat cycles.
And with everything installed, getting to the two bottom nuts can be a
pain. But, failure to keep them properly torqued leads to blown out
gaskets.

On 2025-04-09 06:55, vfracing--- via Fot wrote:

> Lyman; 
> 
> another possible cause is a mis match in the thicknesses of the intake and exhaust manifold flanges.
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
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eva,sans-serif'>
<p>My money is on this one... Blowing out the bottom of the intake gaskets =
means you didn't get nearly enough pressure (if any) from that pesky lower =
mounting stud and clamp. I have found if you use anything other than a stoc=
k intake manifold and stock exhaust manifold, you must scrutinize the area =
where the clamps will sit to ensure the height is very similar. Or, modify =
the clamps by welding on something to make sure when the clamp rests on the=
 appropriate bits of the intake and exhaust manifold, when the nut is tight=
ened it puts equal pressure on both manifolds.&nbsp;Obviously, the mounting=
 face on each manifold needs to be flat. Assuming you have everything in or=
der, there is no reason a stock manifold gasket will not work, I have run t=
hem when I could not get my hands on the HD gaskets and they worked fine fo=
r me.&nbsp;</p>
<p>Last thought, the nuts that hold the manifolds on are notorious for loos=
ening up in time, and especially after the first few heat cycles. And with =
everything installed, getting to the two bottom nuts can be a pain. But, fa=
ilure to keep them properly torqued leads to blown out gaskets.</p>
<div id=3D"signature">&nbsp;</div>
<p><br /></p>
<p id=3D"reply-intro">On 2025-04-09 06:55, vfracing--- via Fot wrote:</p>
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">
<div id=3D"replybody1">
<div>
<div class=3D"v1ydpc0738470yahoo-style-wrap" style=3D"font-family: arial; f=
ont-size: 16px;">
<div>&nbsp;</div>
<div dir=3D"ltr">Lyman;</div>
<div dir=3D"ltr">&nbsp;</div>
<div dir=3D"ltr">&nbsp;another possible cause is a mis match in the thickne=
sses of the intake and exhaust manifold flanges.</div>
</div>
</div>
</div>
</blockquote>
</body></html>

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From: Anthony Parker via Fot <[email-masked]>
Date: Wed, 9 Apr 2025 12:48:27 +0000

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What does "blowing out" mean for an intake gasket?

Is it just falling apart from lack of support/clamping?

Or, is it pressure from a return pulse due to valve closing?

Or, is it lots of backfiring?

________________________________
From: Fot <[email-masked]> on behalf of yellow04 via Fot <fot@a=
utox.team.net>
Sent: Wednesday, April 9, 2025 8:33 AM
To: FOT <[email-masked]>
Subject: Re: [Fot] TR intake gaskets

My money is on this one... Blowing out the bottom of the intake gaskets mea=
ns you didn't get nearly enough pressure (if any) from that pesky lower mou=
nting stud and clamp. I have found if you use anything other than a stock i=
ntake manifold and stock exhaust manifold, you must scrutinize the area whe=
re the clamps will sit to ensure the height is very similar. Or, modify the=
 clamps by welding on something to make sure when the clamp rests on the ap=
propriate bits of the intake and exhaust manifold, when the nut is tightene=
d it puts equal pressure on both manifolds. Obviously, the mounting face on=
 each manifold needs to be flat. Assuming you have everything in order, the=
re is no reason a stock manifold gasket will not work, I have run them when=
 I could not get my hands on the HD gaskets and they worked fine for me.

Last thought, the nuts that hold the manifolds on are notorious for looseni=
ng up in time, and especially after the first few heat cycles. And with eve=
rything installed, getting to the two bottom nuts can be a pain. But, failu=
re to keep them properly torqued leads to blown out gaskets.

Lyman;

 another possible cause is a mis match in the thicknesses of the intake and=
 exhaust manifold flanges.

--_000_MN0PR84MB3867023B016BED53394EF276D7B42MN0PR84MB3867NAMP_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
What does &quot;blowing out&quot; mean for an intake gasket?</div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Is it just falling apart from lack of support/clamping?</div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Or, is it pressure from a return pulse due to valve closing?</div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Or, is it lots of backfiring?</div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class=3D"elementToProof" style=3D"font-family: Calibri, Helvetica, san=
s-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div id=3D"appendonsend"></div>
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" st=
yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> Fot &lt;fot-bounces@a=
utox.team.net&gt; on behalf of yellow04 via Fot &lt;[email-masked]&gt;<=
br>
<b>Sent:</b> Wednesday, April 9, 2025 8:33 AM<br>
<b>To:</b> FOT &lt;[email-masked]&gt;<br>
<b>Subject:</b> Re: [Fot] TR intake gaskets</font>
<div>&nbsp;</div>
</div>
<div style=3D"font-size:10pt; font-family:Verdana,Geneva,sans-serif">
<p>My money is on this one... Blowing out the bottom of the intake gaskets =
means you didn't get nearly enough pressure (if any) from that pesky lower =
mounting stud and clamp. I have found if you use anything other than a stoc=
k intake manifold and stock exhaust
 manifold, you must scrutinize the area where the clamps will sit to ensure=
 the height is very similar. Or, modify the clamps by welding on something =
to make sure when the clamp rests on the appropriate bits of the intake and=
 exhaust manifold, when the nut
 is tightened it puts equal pressure on both manifolds.&nbsp;Obviously, the=
 mounting face on each manifold needs to be flat. Assuming you have everyth=
ing in order, there is no reason a stock manifold gasket will not work, I h=
ave run them when I could not get my
 hands on the HD gaskets and they worked fine for me.&nbsp;</p>
<p>Last thought, the nuts that hold the manifolds on are notorious for loos=
ening up in time, and especially after the first few heat cycles. And with =
everything installed, getting to the two bottom nuts can be a pain. But, fa=
ilure to keep them properly torqued
 leads to blown out gaskets.</p>
<div id=3D"x_signature">&nbsp;</div>
<p><br>
</p>
<p id=3D"x_reply-intro">On 2025-04-09 06:55, vfracing--- via Fot wrote:</p>
<blockquote type=3D"cite" style=3D"padding:0 0.4em; border-left:#1010ff 2px=
 solid; margin:0">
<div id=3D"x_replybody1">
<div>
<div class=3D"x_v1ydpc0738470yahoo-style-wrap" style=3D"font-family:arial; =
font-size:16px">
<div>&nbsp;</div>
<div dir=3D"ltr">Lyman;</div>
<div dir=3D"ltr">&nbsp;</div>
<div dir=3D"ltr">&nbsp;another possible cause is a mis match in the thickne=
sses of the intake and exhaust manifold flanges.</div>
</div>
</div>
</div>
</blockquote>
</div>
</body>
</html>

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From: Dean Tetterton via Fot <[email-masked]>
Date: Wed, 9 Apr 2025 08:56:48 -0400

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This is correct. The thickness of the clamping surfaces must be the same.
It also helps to tighten the
bottom clamp between the manifolds first. The intake will hang up on the
pin between the intake ports
 and not let the bottom of the intake seat all the way. Sometimes the hole
for the pin is too tight.

Dean

On Wed, Apr 9, 2025 at 8:41=E2=80=AFAM yellow04 via Fot <[email-masked]=
> wrote:

> means you didn't get nearly enough pressure (if any) from that pesky lowe=
r
> mounting stud and clamp. I have found if you use anything other than a
> stock intake manifold and stock exhaust manifold, you must scrutinize the
> area where the clamps will sit to ensure the height is very similar. Or,
> modify the clamps by welding on something to make sure when the clamp res=
ts
> on the appropriate bits of the intake and exhaust manifold, when the nut =
is
> tightened it puts equal pressure on both manifolds. Obviously, the mounti=
ng
> face on each manifold needs to be flat. Assuming you have everything in
> order, there is no reason a stock manifold gasket will not work, I have r=
un
> them when I could not get my hands on the HD gaskets and they worked fine
> for me.
>
> loosening up in time, and especially after the first few heat cycles. And
> with everything installed, getting to the two bottom nuts can be a pain.
> But, failure to keep them properly torqued leads to blown out gaskets.
>
>
>
> Unsubscribe/Manage <http://www.team.net/pipermail/fotUnsubscribe/Manage>:
> http://autox.team.net/mailman/options/fot/[email-masked]
>
>
>

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<div dir=3D"ltr">This is correct. The thickness of the clamping surfaces mu=
st be the same. It also helps to tighten the<div>bottom clamp between the m=
anifolds first. The intake will hang up on the pin between the intake ports=
</div><div>=C2=A0and not let the bottom of the intake seat all the way. Som=
etimes the hole for the pin is too tight.</div><div><br></div><div>Dean</di=
v><div><br></div></div><br><div class=3D"gmail_quote gmail_quote_container"=
><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Apr 9, 2025 at 8:41=E2=80=AF=
AM yellow04 via Fot &lt;<a href=3D"mailto:[email-masked]">[email-masked]=
m.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex"><div style=3D"font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p>My money is on this one... Blowing out the bottom of the intake gaskets =
means you didn&#39;t get nearly enough pressure (if any) from that pesky lo=
wer mounting stud and clamp. I have found if you use anything other than a =
stock intake manifold and stock exhaust manifold, you must scrutinize the a=
rea where the clamps will sit to ensure the height is very similar. Or, mod=
ify the clamps by welding on something to make sure when the clamp rests on=
 the appropriate bits of the intake and exhaust manifold, when the nut is t=
ightened it puts equal pressure on both manifolds.=C2=A0Obviously, the moun=
ting face on each manifold needs to be flat. Assuming you have everything i=
n order, there is no reason a stock manifold gasket will not work, I have r=
un them when I could not get my hands on the HD gaskets and they worked fin=
e for me.=C2=A0</p>
<p>Last thought, the nuts that hold the manifolds on are notorious for loos=
ening up in time, and especially after the first few heat cycles. And with =
everything installed, getting to the two bottom nuts can be a pain. But, fa=
ilure to keep them properly torqued leads to blown out gaskets.</p>
<div id=3D"m_5734550077102634702signature">=C2=A0</div>
<p><br></p>
<p id=3D"m_5734550077102634702reply-intro">On 2025-04-09 06:55, vfracing---=
 via Fot wrote:</p>
<blockquote type=3D"cite" style=3D"padding:0px 0.4em;border-left:2px solid =
rgb(16,16,255);margin:0px">
<div id=3D"m_5734550077102634702replybody1">
<div>
<div style=3D"font-family:arial;font-size:16px">
<div>=C2=A0</div>
<div dir=3D"ltr">Lyman;</div>
<div dir=3D"ltr">=C2=A0</div>
<div dir=3D"ltr">=C2=A0another possible cause is a mis match in the thickne=
sses of the intake and exhaust manifold flanges.</div>
</div>
</div>
</div>
</blockquote>
</div>
_______________________________________________<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]<=
/a><br>
<br>
<a href=3D"http://www.fot-racing.com" rel=3D"noreferrer" target=3D"_blank">=
http://www.fot-racing.com</a><br>
<br>
et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://autox.team.net/archive" rel=3D"noreferrer" targe=
t=3D"_blank">http://autox.team.net/archive</a> <a href=3D"http://www.team.n=
et/pipermail/fotUnsubscribe/Manage" rel=3D"noreferrer" target=3D"_blank">ht=
tp://www.team.net/pipermail/fot<br>
t/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://autox.t=
eam.net/mailman/options/fot/[email-masked]</a><br>
<br>
<br>
</blockquote></div>

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---

From: Bob Kramer via Fot <[email-masked]>
Date: Wed, 9 Apr 2025 08:15:20 -0500

--===============2695999617719568005==

--00000000000007238006325845b7

--00000000000007237e06325845b6
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Getting to the two bottom nuts gets even more difficult when you add a
support bracketing to take the place of the OEM bolting of the intake to
the exhaust manifold that we lose when using a header, thus it is easier to
get it wrong.

On Wed, Apr 9, 2025 at 7:48=E2=80=AFAM yellow04 via Fot <[email-masked]=

r
ts
is
ng
un
> http://autox.team.net/mailman/options/fot/[email-masked]
>
>
>

--=20

Please consider supporting my MS150 Ride

https://events.nationalmssociety.org/participant/590407

--00000000000007237e06325845b6
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Getting to the two bottom nuts gets even more=C2=A0difficu=
lt when you add a support bracketing to take the place of the OEM bolting o=
f the intake to the exhaust=C2=A0manifold that we lose when using a header,=
 thus it is easier to get it wrong.</div><br><div class=3D"gmail_quote gmai=
l_quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Apr 9, 202=
5 at 7:48=E2=80=AFAM yellow04 via Fot &lt;<a href=3D"mailto:[email-masked].=
net">[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_=
quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,=
204);padding-left:1ex"><div style=3D"font-size:10pt;font-family:Verdana,Gen=
eva,sans-serif">
<p>My money is on this one... Blowing out the bottom of the intake gaskets =
means you didn&#39;t get nearly enough pressure (if any) from that pesky lo=
wer mounting stud and clamp. I have found if you use anything other than a =
stock intake manifold and stock exhaust manifold, you must scrutinize the a=
rea where the clamps will sit to ensure the height is very similar. Or, mod=
ify the clamps by welding on something to make sure when the clamp rests on=
 the appropriate bits of the intake and exhaust manifold, when the nut is t=
ightened it puts equal pressure on both manifolds.=C2=A0Obviously, the moun=
ting face on each manifold needs to be flat. Assuming you have everything i=
n order, there is no reason a stock manifold gasket will not work, I have r=
un them when I could not get my hands on the HD gaskets and they worked fin=
e for me.=C2=A0</p>
<p>Last thought, the nuts that hold the manifolds on are notorious for loos=
ening up in time, and especially after the first few heat cycles. And with =
everything installed, getting to the two bottom nuts can be a pain. But, fa=
ilure to keep them properly torqued leads to blown out gaskets.</p>
<div id=3D"m_8205082758269726652signature">=C2=A0</div>
<p><br></p>
<p id=3D"m_8205082758269726652reply-intro">On 2025-04-09 06:55, vfracing---=
 via Fot wrote:</p>
<blockquote type=3D"cite" style=3D"padding:0px 0.4em;border-left:2px solid =
rgb(16,16,255);margin:0px">
<div id=3D"m_8205082758269726652replybody1">
<div>
<div style=3D"font-family:arial;font-size:16px">
<div>=C2=A0</div>
<div dir=3D"ltr">Lyman;</div>
<div dir=3D"ltr">=C2=A0</div>
<div dir=3D"ltr">=C2=A0another possible cause is a mis match in the thickne=
sses of the intake and exhaust manifold flanges.</div>
</div>
</div>
</div>
</blockquote>
</div>
_______________________________________________<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]<=
/a><br>
<br>
<a href=3D"http://www.fot-racing.com" rel=3D"noreferrer" target=3D"_blank">=
http://www.fot-racing.com</a><br>
<br>
et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://autox.team.net/archive" rel=3D"noreferrer" targe=
t=3D"_blank">http://autox.team.net/archive</a> <a href=3D"http://www.team.n=
et/pipermail/fotUnsubscribe/Manage" rel=3D"noreferrer" target=3D"_blank">ht=
tp://www.team.net/pipermail/fot<br>
t/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://autox.te=
am.net/mailman/options/fot/[email-masked]</a><br>
<br>
<br>
</blockquote></div><div><br clear=3D"all"></div><div><br></div><span class=
=3D"gmail_signature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_s=
ignature"><div dir=3D"ltr"><img src=3D"cid:d9cc326d-6600-49d5-8e71-17991653=
d097" width=3D"96" height=3D"76"><div><br></div><div>Please consider suppor=
ting my MS150 Ride</div><div><br></div><div><a href=3D"https://events.natio=
nalmssociety.org/participant/590407" target=3D"_blank">https://events.natio=
nalmssociety.org/participant/590407</a></div></div></div>

--00000000000007237e06325845b6--

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---

From: Joe Boruch via Fot <[email-masked]>
Date: Wed, 9 Apr 2025 16:48:45 +0000 (UTC)

--===============1660517605423004772==
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 At one time I removed the pins, tapped the holes in the head and installed=
 studs in place of the pins.=C2=A0 I enlarged the holes in the manifold to =
accept the new studs.=C2=A0 This gives a more secure way to attach the inta=
ke manifold.=C2=A0 I also modified the manifold clamps so that one side is =
thinner to accommodate the thickness difference between the intake flanges =
and the header flanges.JoeB
    On Wednesday, April 9, 2025 at 09:58:28 AM EDT, Dean Tetterton via Fot =
<[email-masked]> wrote: =20
=20
 This is correct. The thickness of the clamping surfaces must be the same. =
It also helps to tighten thebottom clamp between the manifolds first. The i=
ntake will hang up on the pin between the intake ports=C2=A0and not let the=
 bottom of the intake seat all the way. Sometimes the hole for the pin is t=
oo tight.
Dean

 =20
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<html><head></head><body><div class="ydp6faca55cyahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
        <div dir="ltr" data-setdir="false">At one time I removed the pins, tapped the holes in the head and installed studs in place of the pins.&nbsp; I enlarged the holes in the manifold to accept the new studs.&nbsp; This gives a more secure way to attach the intake manifold.&nbsp; I also modified the manifold clamps so that one side is thinner to accommodate the thickness difference between the intake flanges and the header flanges.</div><div dir="ltr" data-setdir="false">JoeB</div><div><br></div>
        
        <div id="ydp6faca55cyahoo_quoted_4881487661" class="ydp6faca55cyahoo_quoted">
            <div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;">
                
                <div>
                    On Wednesday, April 9, 2025 at 09:58:28 AM EDT, Dean Tetterton via Fot &lt;[email-masked]&gt; wrote:
                </div>
                <div><br></div>
                <div><br></div>
                <div><div id="ydp6faca55cyiv8487282537"><div dir="ltr">This is correct. The thickness of the clamping surfaces must be the same. It also helps to tighten the<div>bottom clamp between the manifolds first. The intake will hang up on the pin between the intake ports</div><div>&nbsp;and not let the bottom of the intake seat all the way. Sometimes the hole for the pin is too tight.</div><div><br clear="none"></div><div>Dean</div><div><br clear="none"></div></div><br clear="none"><div class="ydp6faca55cyiv8487282537gmail_quote ydp6faca55cyiv8487282537gmail_quote_container"><div id="ydp6faca55cyiv8487282537yqt15815" class="ydp6faca55cyiv8487282537yqt7961548936"><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="ydp6faca55cyiv8487282537gmail_quote"><div style="font-size:10pt;font-family:Verdana, Geneva, sans-serif;"><p><br><br></p></div></blockquote></div></div></div></div>
            </div>
        </div></div></body></html>
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From: Chris Marx via Fot <[email-masked]>
Date: Thu, 10 Apr 2025 13:05:41 +0200

I use silicone to seal intakes and headers.
Never failed.

Cheers
Chris

-----Original Message-----
From: Fot <[email-masked]> On Behalf Of Lyman Scherer via Fot
Sent: Wednesday, April 9, 2025 12:53 AM
To: Triumph FOT <[email-masked]>
Subject: [Fot] TR intake gaskets

Stock TR Moss Motors intake gasket. #1 intake port blow-out, #4 port did
same blow-out weeks prior No exhaust port leaks!!!
This is BajaTR3 engine that never had this issue, raced for years.
Difference: used existing TR4 intakes and headers. Clamping type in not
stock TR. Probably the cause!
Are copper gasket available??
Or better recommendations ??
I can have gaskets made, just asking for experienced thoughts.
Cheers, Lyman S.