Push downward on the sensor housing in an attempt to make it flush with the interior contour of the wheel, before you tighten it. Push Down Before Tightening the Sensor Nut The new nut may have coatings on the threads that prevent corrosion and leaks.ħ. The material of choice is typically aluminum. The nut is made of a softer metal than the stem, so it can be damaged or develop hairline cracks if it is over-tightened. If the seal is reused, it could cause a slow leak. The instant the nut is torqued, the seal/grommet starts to take on the shape of the surfaces it is sealing against. The two grommets seal the sensor and nut to the wheel. Mounting the sensor upside down can cause relearn and transmission problems. The potted side of the sensor is to be positioned toward the wheel. Insert the sensor through the wheel, keeping pressure against the rear of the metal valve stem. If the valve core is removed, it must be replaced with a new valve core in order to avoid galvanic corrosion issues, which may cause the valve core to fail.ĥ. This can change the torque values and cause you to snap the stem. Do not lubricate or use a sealant in this area. Pieces of the old seal can cause a slow leak. Make sure the surface of the wheel is not damaged. Wipe the area clean around the sensor/valve stem mounting hole in the wheel.
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