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<DIV>Fred – Kees is right. I believe that the problem is the split
washers. The factory used a flat washer only – no lock washer at all
- along with the special tall brass nut. The idea is that the less
material there is for expansion / contraction. in that very hot environment, the
less chance of problems. I have been using a thin stainless flat washer
for years on both Healeys – I’ve never had loosening problems (they need to be
checked after the initial few start cycles, say 100 miles or so, and then maybe
at the next service). I’ve also never torqued the flange nuts, just
tightened them hard.</DIV>
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<DIV>As a related aside, I’ve had better success over the years with the copper
faced flange gaskets. The other type seems to blow out a bit easier.</DIV>
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<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; COLOR: #141100">Earl
Kagna<BR>Victoria, B.C.<BR>BJ8, BT7 tri-carb</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=fredwescoe@gmail.com
href="mailto:fredwescoe@gmail.com">Fred Wescoe</A> </DIV>
<DIV><B>Sent:</B> Wednesday, October 16, 2019 5:46 PM</DIV>
<DIV><B>To:</B> <A title=Healeys@autox.team.net
href="mailto:Healeys@autox.team.net">healeys</A> </DIV>
<DIV><B>Subject:</B> [Healeys] Down pipes</DIV></DIV></DIV>
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<DIV dir=ltr>Listers,
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<DIV>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.</DIV>
<DIV> </DIV>
<DIV>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.</DIV>
<DIV> </DIV>
<DIV>Thanks for any advice, I'm stumped,</DIV>
<DIV> </DIV>
<DIV>Fred</DIV>
<DIV>66 BJ8</DIV></DIV>
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