the bung. If there is not an acceptable bung already in the exhaust, please plug all poorly placed bungs and follow the following
instructions for the included Clamp-On O2 bung.
If needed, Hooker Blackheart offers different diameter Clamp-On O2 Bung kits:
2.25” Diameter: 71014303-RHKR
2.5” Diameter: 71014302-RHKR
3.0” Diameter: 71014301-RHKR
1. Locate a place in the exhaust to drill a 3/4" hole. Make sure to allow enough clearance for an O2 sensor and wiring harness. It is
important to keep the O2 bung (Item 2a) at least 12 inches from open exhaust. Ensure the location for the sensor is at an angle
(Figure 2). This will help prevent condensation in the exhaust tubing from entering the sensor. The sensor can be mounted on either
side of the tubing.
Figure 2
2. Mark the center of the casting on the exhaust tube and drill a 3/4" hole. Deburr the hole after drilling (Figure 3).
Figure 3 Figure 4
3. Place the gasket on the tube, then the casting on the tube. Slip a clamp on one side and lightly tighten. Slip the second clamp on
and lightly tighten.
Figure 5 Figure 6
4. Verify the center of the casting is in the center of the hole and tighten clamps.
5. Install the O2 sensor in the bung. Lightly tighten with a wrench.
Figure 7
5.0 COOLANT TEMPERATURE SENSOR INSTALLATION
1. Install the Coolant Temperature Sensor (Item 3) into a 3/8” NPT coolant passage in either the intake manifold or cylinder head. Do
not overtighten or damage to the cylinder head or intake may occur. It is best to drain the some of the coolant before the sensor is
installed. Use thread sealer or a small amount of thread tape. Do not install the sensor in the thermostat housing, or in an area that
will not see a constant flow of coolant.
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