PN2931 Datasheet, PDF (1/2 Pages) Mallory performance club – MSD O2 Sensor Bung and Plug

MSD O2 Sensor Bung and Plug
PN 2931
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Parts Included:
1 – O2 Sensor Bung
1 – Bung Plug
1 – Crush washer
BUNG CRUSH PLUG
WASHER
WIDE BAND OXYGEN SENSOR INSTALLATION
The WBO2 can be installed downstream of either exhaust
bank. The sensor connects to the Power Module, so install
02 SENSOR
the sensor on the bank closest to where you plan to mount
the Module. The bung should be installed by a qualified
exhaust technician and pressure tested. Proper installation
POSITION
of the oxygen sensor is critical to the performance. Improper
AT LEAST
installation could lead to engine damage.
10°
1. Locate the ideal spot to install the WBO2.
a. This location should be 2-4 inches after the
exhaust collector. The sensor must be more
EXHAUST
than 18 inches forward of the exhaust tip. For
applications where short or open headers are
used, install the WBO2 in the primary tube of
Figure 1 WBO2 Sensor Location.
the rear cylinder at least 8 inches away from the
exhaust port. The wide band sensor will not work on “Zoomie” style headers.
b. The WBO2 sensor should be at least 10˚ above horizontal to allow condensation runoff. Without
this angle the sensor is significantly more likely to sustain water damage (Figure 1).
c. Try not to place the WBO2 on the outside of a bend.
d. The WBO2 must be mounted in the exhaust prior to any catalytic converter, if applicable.
2. Drill a 7/8” hole in the exhaust where the WBO2 will go.
3. Weld in the supplied bung. Ensure the weld goes completely around the bung and is air tight.
4. Insert supplied plug in bung. Never run the vehicle with a WBO2 installed but not powered; it will damage
the sensor.
5. When inserting the WBO2 MSD suggests using a small amount of anti-seize on the threads.
Note: The wide band is extremely sensitive to air leaks in the exhaust system. Any air leak between the
engine and the WBO2 will cause the wideband sensor to have false readings, which can lead to
poor engine performance, misfires, and an inability to properly auto-tune. Improper installation of
the oxygen sensor, and any damage that may result from such an installation, is not covered by the
manufacturer’s warranty.
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