©
2019 CDI Meters, Inc.
10.19
Step 1
a. Mount the base assembly on the pipe and
tighten the cap screws evenly. The torque
should be sufficient to seal the gasket but
not so great that it will crush the gasket, or
distort or over-stress the pipe.
b. Place the drill guide over the exposed
socket head cap screws, sliding fully to the
other side, and tighten. Orient the drill guide
so that the muffler is horizontal or pointing
down.
c.
Open the corresponding valve.
d.
Install the 5/32” drill bit into the drill’s chuck.
Insert the bit into the drill guide and base
until the tip makes contact with the pipe.
The distance between the chuck and the top
of the drill guide must exceed the thickness
of the pipe’s wall. Readjust if necessary.
Step 2
a. Without applying too much force, begin
drilling the hole. Occasionally back the drill
bit off of the pipe to help dissipate heat and
clear the chips.
b. Once you have broken through the first wall
of the pipe, and being careful not to drill into
the far wall, run the drill bit up and down
through the hole to ensure clean edges.
With the drill bit still spinning, extract it so
one to two inches of it is exposed, being
careful not to completely remove the bit or
expose the flute. Hold it there for a few
seconds to give time for all chips to bypass
the drill bit and collect within the muffler.
c.
Carefully remove one hand from the drill
and apply light pressure to the
corresponding valve handle as if you were
closing it. While the bit is spinning, begin
extracting the drill bit slowly. The pressure
applied to the valve handle will help indicate when the drill bit has cleared.
When this happens, rotate the handle 90° to its closed position. It is now
safe to completely remove the drill bit. At this stage a slight hiss may be
present through the drill guide.
