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I have seen applications of RTV go bad.=C2=A0 One was when it was used in =
place of a proper gasket for the fuel sender on my TR3.=C2=A0 When it was c=
lamped down RTV icicles oozed out into the tank.=C2=A0=C2=A0 One problem is=
that=C2=A0 I know of no RTV that is rated for exposure to gasoline but th=
e other problem is there was an RTV-cicle that softened, broke loose and fo=
und its way into the fuel system blocking the flow of fuel resulting in a t=
ow home.=C2=A0 This scenario in an engine crankcase is scary.=C2=A0 Creatin=
g a lubrication blockage can result in bearing failure.
None-the-less, I use the Blue stuff on waterpumps and other cooling system =
parts as just about any RTV has no issues with water.=C2=A0 But I use a tri=
ck I once read many years ago where I loosely assemble the parts taking up =
any slack but leaving the bolts or nuts snug but not tight so as to not for=
ce the sealant to flow.=C2=A0 Then I wait 15 - 30 minutes to allow the RTV =
to start to set.=C2=A0 Once it is partially set it will not flow and the pa=
rt can be torqued down without fear of RTV-cicles.
If you are going to use Ultra Gray, which looks like an excellent choice fo=
r this application, I recommend this technique.
=C2=A0But I prefer to use Form-A-Gasket #2 on one side of the gasket to mor=
e or less permanently adhere it to once surface and , like Tim, Hylomar on =
the other surface to allow for easy removal down the line.
Dave=20
=20
=20
-----Original Message-----
From: Alex & Janet Thomson <aljlthomson@charter.net>
To: 'Dean Mericas' <dmericas@gmail.com>; triumphs <triumphs@autox.team.net>
Sent: Sun, Mar 29, 2020 5:56 am
Subject: Re: [TR] Gasket sealant for sump
I have used Permatex Ultra Black on a number of occasions and have had good=
luck. Disassembly of items cemented together with this product can be chal=
lenging, though. Maybe I should try the "ultra-gray". I find things work be=
st if you can insert a couple of studs into the larger half of whatever is =
being assembled so that the attached item goes on straight, without any sid=
eways movement. I have found that large gaskets for tractor transmission ca=
stings have gotten really expensive ($50 plus) and then sometimes they eith=
er come damaged from shipping, crack & break when being installed, or holes=
don't line up properly for bolts. As a result, I tend to use the "gasket-i=
n-a-tube" approach more than ever. Sometimes I find it challenging to decid=
e what product to buy - there are so many.
Alex Thomson
-----Original Message-----
From: Triumphs [mailto:triumphs-bounces@autox.team.net] On Behalf Of Dean M=
ericas
Sent: Saturday, March 28, 2020 8:23 PM
To: triumphs@autox.team.net
Subject: [TR] Gasket sealant for sump
I=E2=80=99m resealing the engine and transmission on my TR4 after 20 years =
of reliable service.=20
Today I had a massive failure installing the sump gasket using Hylotyte Red=
100 sealant. It seems to have weakened the gasket to the point that it tore=
around several bolt holes as I torqued the bolts.=20
Plan B is to thoroughly clean the mating surfaces and use Permatex Ultra Gr=
ay, which I=E2=80=99ve generally had good luck with on my Alfa Romeos.=20
Before I do that, I wanted to see if any of you can recommend other sealant=
s for this purpose. I only want to do it one more time.=20
Thanks.=20
Dean
1965 TR-4
Sent from my iPad
*
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<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">I have seen applications of RTV go bad. One wa=
s when it was used in place of a proper gasket for the fuel sender on my TR=
3. When it was clamped down RTV icicles oozed out into the tank. =
; One problem is that </font><font size=3D"3"><font size=3D"3"> =
I know of </font> no RTV that is rated for exposure to gasoline but the oth=
er problem is there was an RTV-cicle that softened, broke loose and found i=
ts way into the fuel system blocking the flow of fuel resulting in a tow ho=
me. This scenario in an engine crankcase is scary. Creating a l=
ubrication blockage can result in bearing failure.</font></div>
<div><font size=3D"3"><br>
</font></div>
<div><font size=3D"3">None-the-less, I use the Blue stuff on waterpumps and=
other cooling system parts as just about any RTV has no issues with water.=
But I use a trick I once read many years ago where I loosely assembl=
e the parts taking up any slack but leaving the bolts or nuts snug but not =
tight so as to not force the sealant to flow. Then I wait 15 - 30 min=
utes to allow the RTV to start to set. Once it is partially set it wi=
ll not flow and the part can be torqued down without fear of RTV-cicles.</f=
ont></div>
<div><font size=3D"3"><br>
</font></div>
<div><font size=3D"3">If you are going to use Ultra Gray, which looks like =
an excellent choice for this application, I recommend this technique.</font=
><br>
</div>
<div> </div>
<div><font size=3D"3">But I prefer to use Form-A-Gasket #2 on one side of t=
he gasket to more or less permanently adhere it to once surface and , like =
Tim, Hylomar on the other surface to allow for easy removal down the line.<=
/font></div>
<div><font size=3D"3"></font><br>
</div>
<div style=3D"clear:both"><font size=3D"4">Dave </font><br>
<br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Alex & Janet Thomson <aljlthomson@charter.net><br>
To: 'Dean Mericas' <dmericas@gmail.com>; triumphs <triumphs@autox.=
team.net><br>
Sent: Sun, Mar 29, 2020 5:56 am<br>
Subject: Re: [TR] Gasket sealant for sump<br>
<br>
<div dir=3D"ltr">I have used Permatex Ultra Black on a number of occasions =
and have had good luck. Disassembly of items cemented together with this pr=
oduct can be challenging, though. Maybe I should try the "ultra-gray". I fi=
nd things work best if you can insert a couple of studs into the larger hal=
f of whatever is being assembled so that the attached item goes on straight=
, without any sideways movement. I have found that large gaskets for tracto=
r transmission castings have gotten really expensive ($50 plus) and then so=
metimes they either come damaged from shipping, crack & break when bein=
g installed, or holes don't line up properly for bolts. As a result, I tend=
to use the "gasket-in-a-tube" approach more than ever. Sometimes I find it=
challenging to decide what product to buy - there are so many.<br clear=3D=
"none"><br clear=3D"none">Alex Thomson<br clear=3D"none"><br clear=3D"none"=
>-----Original Message-----<br clear=3D"none">From: Triumphs [mailto:<a sha=
pe=3D"rect" ymailto=3D"mailto:triumphs-bounces@autox.team.net"; rel=3D"noope=
ner noreferrer" removedlink__616cfe6c-361a-45d9-9284-ea4fae11a56e__href=3D"=
mailto:triumphs-bounces@autox.team.net";>triumphs-bounces@autox.team.net</a>=
] On Behalf Of Dean Mericas<br clear=3D"none">Sent: Saturday, March 28, 202=
0 8:23 PM<br clear=3D"none">To: <a shape=3D"rect" ymailto=3D"mailto:triumph=
s@autox.team.net" rel=3D"noopener noreferrer" removedlink__616cfe6c-361a-45=
d9-9284-ea4fae11a56e__href=3D"mailto:triumphs@autox.team.net";>triumphs@auto=
x.team.net</a><br clear=3D"none">Subject: [TR] Gasket sealant for sump<br c=
lear=3D"none"><br clear=3D"none">I=E2=80=99m resealing the engine and trans=
mission on my TR4 after 20 years of reliable service. <br clear=3D"none"><b=
r clear=3D"none">Today I had a massive failure installing the sump gasket u=
sing Hylotyte Red100 sealant. It seems to have weakened the gasket to the p=
oint that it tore around several bolt holes as I torqued the bolts. <br cle=
ar=3D"none"><br clear=3D"none">Plan B is to thoroughly clean the mating sur=
faces and use Permatex Ultra Gray, which I=E2=80=99ve generally had good lu=
ck with on my Alfa Romeos. <br clear=3D"none"><br clear=3D"none">Before I d=
o that, I wanted to see if any of you can recommend other sealants for this=
purpose. I only want to do it one more time. <br clear=3D"none"><br clear=
=3D"none">Thanks. <br clear=3D"none"><br clear=3D"none">Dean<br clear=3D"no=
ne">1965 TR-4<br clear=3D"none">Sent from my iPad<br clear=3D"none">*</div>
</div>
</div>
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** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
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