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The Japanese motorcycle manufacturers solved the fundamental =
gasket-enhancement issue long ago, with two products that perform like =
Hylomar but IMHO are a bit better. Yamaha called them Yamabond #4 and =
#5. The product is actually made by Threebond, and about every MC =
company uses them and private labels the stuff, including Ducati. #4 is =
a heavier consistency and can be used in gasket-less applications. #5 is =
thin, flexible and non-hardening and works well for coating gaskets. It =
won=E2=80=99t tear thin paper gaskets during disassembly. Great stuff.=20=
> On Feb 7, 2021, at 9:45 AM, van.mulders.marcel--- via Fot =
<fot@autox.team.net> wrote:
>=20
> Frank, indeed Hylomar is a right sealant and Silicone is not. Hylomar =
is a not-setting, non hardening product that allows metal to metal =
contact even when the cylinderhead is torqued down only after one day.
> The purpose of the silicone sealants is to form a sheet when cured (by =
the moisture in the air) and cannot be compressed after some time. The =
Permatex brand : the brown stuff is ok, but Permatex blue RTV silicone =
is not. Curing by moisture is slower than anaerobic curing : one could =
apply silicone to the Fo8 gaskets and torque the cylhead down =
immediately, but that is taking risks and it is not the intended use of =
RTV silicone.
> Marcel
>=20
>=20
> Van: "fot" <fot@autox.team.net>
> Aan: "Triumph List" <triumphs@autox.team.net>, "fot" =
<fot@autox.team.net>, "Dan Cronin" <adcronin@mi.rr.com>
> Verzonden: Zondag 7 februari 2021 02:30:33
> Onderwerp: Re: [Fot] [TR] Sealants used on Fo8 gaskets
>=20
> hylomar.
>=20
> never sets up solid like silicone.
> that means you have time to set the liners and go have a scotch, come =
back, mess around.=20
> leave it overnight and take up the task again tomorrow.
>=20
> the best gasket dressing ever invented.
>=20
> Frank
>=20
> On Friday, February 5, 2021, 09:52:33 PM PST, Dan Cronin =
<adcronin@mi.rr.com> wrote:
>=20
>=20
> Folks
> Looking for some background information and recommendations on the =
preferred Fo8 gasket sealing compound that seems to have worked for each =
of you in your various engine re-builds. And any comments / =
observations you choose to share either on or off list. The motor I am =
building has a 89 mm piston and liner kit from BFE along with Corrello =
rods / bolts and a Crower dummy main crank connected at the front with a =
ATI Super Damper and at the rear to a Fidanza Alloy Flywheel with =
diaphragm clutch, an HVDA conversion with alloy drive shaft to a Quaife =
4.11:1 diff. and alloy back cover. Stainless Steel valves with 0.050 =
oversize intake thru Mang. Bronze guides. H/S roller rockers on alloy =
pedestals. BPNW 270 duration cam. The TR4A head has had 0.040 removed =
mostly to true things up and remove prior imperfections. The head =
chambers have been mildly worked to smooth any sharp edges and even =
things out with a resulting chamber volume of 60.5cc each. I am =
planning on installing Gasket Works 0.022 copper gasket with their 0.005 =
=E2=80=9CO=E2=80=9D compression rings on the head side of the gasket =
that will be sprayed with a copper coating on each side. Gasket Works =
sent a set of Fo8 individual gaskets that has allowed me to obtain a =
liner protrusion of 0.0025 to 0.003. Am aiming at a compression ratio =
of around 9.75 to 1+/- . Looking forward to as many responses as =
possible to assist in trying to get this critical step as close to right =
as I can.
> DC
> <IMG_3668.jpeg>
>=20
> Donate: http://www.team.net/donate.html =
<http://www.team.net/donate.html>
> Archive: http://www.team.net/pipermail/triumphs =
<http://www.team.net/pipermail/triumphs>http://www.team.net/archive =
<http://www.team.net/archive>
>=20
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/triumphs/yellowtr3@yahoo.com =
<http://autox.team.net/mailman/options/triumphs/yellowtr3@yahoo.com>
>=20
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive =
http://www.team.net/pipermail/fot
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/van.mulders.marcel@telenet.be
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive =
http://www.team.net/pipermail/fot
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/bill@ponostyle.com
>=20
>=20
--Apple-Mail=_7107D69F-39D2-489E-92BD-21CCC3AFA8A1
Content-Transfer-Encoding: quoted-printable
charset=utf-8
<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">The =
Japanese motorcycle manufacturers solved the fundamental =
gasket-enhancement issue long ago, with two products that perform like =
Hylomar but IMHO are a bit better. Yamaha called them Yamabond #4 and =
#5. The product is actually made by Threebond, and about every MC =
company uses them and private labels the stuff, including Ducati. #4 is =
a heavier consistency and can be used in gasket-less applications. #5 is =
thin, flexible and non-hardening and works well for coating gaskets. It =
won=E2=80=99t tear thin paper gaskets during disassembly. Great =
stuff. <br class=3D""><div><br class=3D""><blockquote type=3D"cite" =
class=3D""><div class=3D"">On Feb 7, 2021, at 9:45 AM, =
van.mulders.marcel--- via Fot <<a href=3D"mailto:fot@autox.team.net"; =
class=3D"">fot@autox.team.net</a>> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div class=3D""><div =
style=3D"font-family: Verdana, Arial, Helvetica, sans-serif; font-size: =
10pt;" class=3D""><div class=3D""> <!--StartFragment--><div =
class=3D"">Frank, indeed Hylomar is a right sealant and Silicone is not. =
Hylomar is a not-setting, non hardening product that allows metal to =
metal contact even when the cylinderhead is torqued down only after one =
day.</div><div class=3D"">The purpose of the silicone sealants is to =
form a sheet when cured (by the moisture in the air) and cannot be =
compressed after some time. The Permatex brand : the brown stuff is ok, =
but Permatex blue RTV silicone is not. Curing by moisture is slower than =
anaerobic curing : one could apply silicone to the Fo8 gaskets and =
torque the cylhead down immediately, but that is taking risks and it is =
not the intended use of RTV silicone.</div><div =
class=3D"">Marcel</div><div class=3D""><br style=3D"font-family: =
verdana, arial, helvetica, sans-serif; font-size: 13.3333px; font-style: =
normal; font-variant-ligatures: normal; font-variant-caps: normal; =
font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: 2; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: =
rgb(253, 253, 253); text-decoration-thickness: initial;" =
data-mce-style=3D"color: #000000; font-family: verdana, arial, =
helvetica, sans-serif; font-size: 13.3333px; font-style: normal; =
font-variant-ligatures: normal; font-variant-caps: normal; font-weight: =
400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: 2; word-spacing: =
0px; -webkit-text-stroke-width: 0px; background-color: #fdfdfd; =
text-decoration-thickness: initial; text-decoration-style: initial; =
text-decoration-color: initial;" =
class=3D""><!--EndFragment--></div></div><div class=3D""><br =
class=3D""></div><hr id=3D"zwchr" data-marker=3D"__DIVIDER__" =
class=3D""><div data-marker=3D"__HEADERS__" class=3D""><b class=3D"">Van: =
</b>"fot" <<a href=3D"mailto:fot@autox.team.net"; =
class=3D"">fot@autox.team.net</a>><br class=3D""><b class=3D"">Aan: =
</b>"Triumph List" <<a href=3D"mailto:triumphs@autox.team.net"; =
class=3D"">triumphs@autox.team.net</a>>, "fot" <<a =
href=3D"mailto:fot@autox.team.net"; class=3D"">fot@autox.team.net</a>>, =
"Dan Cronin" <<a href=3D"mailto:adcronin@mi.rr.com"; =
class=3D"">adcronin@mi.rr.com</a>><br class=3D""><b =
class=3D"">Verzonden: </b>Zondag 7 februari 2021 02:30:33<br class=3D""><b=
class=3D"">Onderwerp: </b>Re: [Fot] [TR] Sealants used on Fo8 =
gaskets<br class=3D""></div><br class=3D""><div =
data-marker=3D"__QUOTED_TEXT__" class=3D""><div =
class=3D"ydpa6a2aedcyahoo-style-wrap" style=3D"font-family:'helvetica =
neue' , 'helvetica' , 'arial' , sans-serif;font-size:16px">
<div dir=3D"ltr" class=3D"">hylomar.</div><div dir=3D"ltr" =
class=3D""><br class=3D""></div><div dir=3D"ltr" class=3D"">never sets =
up solid like silicone.</div><div dir=3D"ltr" class=3D"">that means you =
have time to set the liners and go have a scotch, come back, mess =
around. </div><div dir=3D"ltr" class=3D"">leave it overnight and =
take up the task again tomorrow.</div><div dir=3D"ltr" class=3D""><br =
class=3D""></div><div dir=3D"ltr" class=3D"">the best gasket dressing =
ever invented.</div><div dir=3D"ltr" class=3D""><br class=3D""></div><div =
dir=3D"ltr" class=3D"">Frank</div><br class=3D"">
=20
</div><div id=3D"ydp2984ea6cyahoo_quoted_3384257547" =
class=3D"ydp2984ea6cyahoo_quoted">
<div style=3D"font-family:'helvetica neue' , 'helvetica' , =
'arial' , sans-serif;font-size:13px;color:#26282a" class=3D"">
=20
<div class=3D"">
On Friday, February 5, 2021, 09:52:33 PM PST, Dan =
Cronin <<a href=3D"mailto:adcronin@mi.rr.com"; =
class=3D"">adcronin@mi.rr.com</a>> wrote:
</div>
<br class=3D"">
<br class=3D"">
<div class=3D""><div id=3D"ydp2984ea6cyiv8272376385" =
class=3D""><div class=3D"">Folks<div =
class=3D"ydp2984ea6cyiv8272376385">Looking for some background =
information and recommendations on the preferred Fo8 gasket sealing =
compound that seems to have worked for each of you in your various =
engine re-builds. And any comments / observations you choose =
to share either on or off list. The motor I am building has a 89 mm =
piston and liner kit from BFE along with Corrello rods / bolts and a =
Crower dummy main crank connected at the front with a ATI Super Damper =
and at the rear to a Fidanza Alloy Flywheel with diaphragm clutch, an =
HVDA conversion with alloy drive shaft to a Quaife 4.11:1 diff. and =
alloy back cover. Stainless Steel valves with 0.050 oversize =
intake thru Mang. Bronze guides. H/S roller rockers on alloy pedestals. =
BPNW 270 duration cam. The TR4A head has had 0.040 removed mostly =
to true things up and remove prior imperfections. The head =
chambers have been mildly worked to smooth any sharp edges and even =
things out with a resulting chamber volume of 60.5cc each. I am =
planning on installing Gasket Works 0.022 copper gasket with their 0.005 =
=E2=80=9CO=E2=80=9D compression rings on the head side of the gasket =
that will be sprayed with a copper coating on each side. Gasket =
Works sent a set of Fo8 individual gaskets that has allowed me to obtain =
a liner protrusion of 0.0025 to 0.003. Am aiming at a compression =
ratio of around 9.75 to 1+/- . Looking forward to as many responses as =
possible to assist in trying to get this critical step as close to right =
as I can.</div><div class=3D"ydp2984ea6cyiv8272376385">DC</div><div =
class=3D"ydp2984ea6cyiv8272376385"><span =
id=3D"cid:o9xohzMA4yNajdV5PxId"><IMG_3668.jpeg></span></div></div></=
div>** <a href=3D"mailto:triumphs@autox.team.net"; rel=3D"nofollow =
nofollow noopener noreferrer" target=3D"_blank" =
class=3D"">triumphs@autox.team.net</a> **<br class=3D""><br =
class=3D"">Donate: <a href=3D"http://www.team.net/donate.html"; =
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com</a><br class=3D""></div>
</div>
</div><br =
class=3D"">_______________________________________________<br =
class=3D""><a href=3D"mailto:fot@autox.team.net"; =
class=3D"">fot@autox.team.net</a><br class=3D""><br =
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__<br class=3D""><a href=3D"mailto:fot@autox.team.net"; =
class=3D"">fot@autox.team.net</a><br class=3D""><br =
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