[Healeys] Down pipes

[Fred Wescoe]

Listers,

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.

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.

Thanks for any advice, I'm stumped,

Fred
66 BJ8
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