another 240 vibration noise found and cured

My 240 (running GREAT since I changed the AMM) has a few
manifold/exhaust/heat shield rattles/harmonics or whatever you want to
call them. Been tracing them down and curing them one at a time. Took
off the heat-riser and shield but it was still there. By manual
probing I sound that the EGR pipe, where it attaches to the manifold
was loose even after torquing the compression nut that holds it.

I loosened the nut and removed the adaptor from the manifold. A
beautiful piece of stainless steel hardware- nice touch! I cleaned it
up ad replaced it but still the pipe was loose in the fitting, so...

I took a piece of +/- 10 or 12 ga. copper, solid-conductor wire,
removed the insulation. I measured the diameter of the EGR pipe and
found the next size smaller drill bit. Put the bit in a vise and
wrapped the wore around it two or three times, making a sort of copper
spring. After tightening the coils I cut along the top, across the
coils, making a set of round, copper washer/spacers.

I took one of them, opened it, put it around the pipe, and tightened
it with locking pliers until the compression nut would slide over it.
This gave the compression nut the ability to hold the EGR tube tightly
in the fitting and that noise disappeared.


Wire ends up back inside here
V
________ Copper wire
|________| V ________
--------------------------| |--||-------| |
<--to EGR valve |_______ | || | |
--------------------------| |--||-------|________|
|________| End of pipe
EGR pipe Compression that fits into
Nut stainless fitting
on exhaust manifold

If you have a rattling noise that sounds sort of like a heat shield
and have an EGR equipped car, check this out by grabbing the pipe
(located at the back side of the exhaust manifold, BUT WAIT FOR THE
CAR TO COOL OFF!) and shaking it. It should be tight..
__ __
Randy & \ \/ /alerie's
\__/olvos
'90 245 Estate - '93 965 Estate
"Shelby" & "Kate"