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Fred, I had the same problem until I determined the correct torque to =
apply to the brass nuts and torqued them while the studs were hot. I =
torqued several used nuts until they stripped. The required torque to =
strip them was more than 300 lb-in. I installed new nuts and torqued =
them to 268 lb-in (a convenient click on my torque wrench) while they =
were hot as an initial test. I later increased that to 288 lb-in a year =
later when I replaced the gaskets, and I have had no more loosening or =
leakage problems.
=20
Steve Byers
HBJ8L/36666
BJ8 Registry
AHCA Delegate at Large
Havelock, NC USA
=20
=20
From: Healeys [mailto:healeys-bounces@autox.team.net] On Behalf Of Fred =
Wescoe
Sent: Wednesday, October 16, 2019 8:46 PM
To: healeys
Subject: [Healeys] Down pipes
=20
Listers,
=20
Today, I had to tighten the 6 nuts on my exhaust down pipes. This is =
the second time in 2 years I have had to do this. What is causing the =
nuts to work loose? Each of the 6 studs from the exhaust manifolds has =
split lock washers and brass nuts on the down pipe flanges. Each time =
time I have tightened the nuts, I tighten them until the nuts squeak.
=20
What am I doing wrong and does anyone else have this issue? What do I =
need to do to fix this? The car is a 66 BJ8 with stock manifolds and =
down pipes.
=20
Thanks for any advice, I'm stumped,
=20
Fred
66 BJ8
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<div class=3DSection1>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Fred, I had the same problem until I determined the =
correct
torque to apply to the brass nuts and torqued them while the studs were =
hot.=C2=A0 =C2=A0I
torqued several used nuts until they stripped.=C2=A0 The required torque =
to strip
them was more than 300 lb-in.=C2=A0 I installed new nuts and torqued =
them to 268
lb-in (a convenient click on my torque wrench) while they were hot as an =
initial
test.=C2=A0 I later increased that to 288 lb-in a year later when I =
replaced the
gaskets, and I have had no more loosening or leakage =
problems.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Steve Byers<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>HBJ8L/36666<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>BJ8 Registry<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>AHCA Delegate at Large<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Havelock, NC=C2=A0 USA<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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0in 0in 0in'>
<p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Healeys
[mailto:healeys-bounces@autox.team.net] <b>On Behalf Of </b>Fred =
Wescoe<br>
<b>Sent:</b> Wednesday, October 16, 2019 8:46 PM<br>
<b>To:</b> healeys<br>
<b>Subject:</b> [Healeys] Down pipes<o:p></o:p></span></p>
</div>
<p class=3DMsoNormal><o:p> </o:p></p>
<div>
<p class=3DMsoNormal>Listers,<o:p></o:p></p>
<div>
<p class=3DMsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=3DMsoNormal>Today, I had to tighten the 6 nuts on my exhaust =
down
pipes. This is the second time in 2 years I have had to do
this. What is causing the nuts to work loose? Each of the 6 =
studs
from the exhaust manifolds has split lock washers and brass nuts on the =
down
pipe flanges. Each time time I have tightened the nuts, I tighten =
them
until the nuts squeak.<o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=3DMsoNormal>What am I doing wrong and does anyone else have =
this
issue? What do I need to do to fix this? The car is a 66 BJ8 =
with
stock manifolds and down pipes.<o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=3DMsoNormal>Thanks for any advice, I'm stumped,<o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=3DMsoNormal>Fred<o:p></o:p></p>
</div>
<div>
<p class=3DMsoNormal>66 BJ8<o:p></o:p></p>
</div>
</div>
</div>
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