Mercury 8T4Z-6312-A Crankshaft Pulley

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Reinstall the remaining parts in the reverse order of removal. Tighten the wheel lug nuts.

Remove the crankshaft position sensor (CKP) from the oil pump body. Install the crankshaft pulley alignment tool (303-1550) where the CKP sensor was mounted.

Lightly coat the crankshaft front seal with clean engine oil, then install the crankshaft pulley. If the seal shows signs of leakage, you may want to replace it before installing the crankshaft pulley.

Loosen the right front wheel lug nuts, raise the front of the vehicle, support it securely on jackstands, and then remove the wheel.

Align the pulley keyway with the crankshaft key and install the pulley with a suitable pulley installation tool available at auto parts stores. Using a pulley installation tool, turn the nut to drive the pulley onto the nose of the crankshaft. Install and tighten the pulley bolt to the torque. The manufacturer suggests that a new pulley bolt be installed.

Using the strap wrench to hold the pulley, tighten the crankshaft pulley bolt in stages, to the torque. Do not use an impact gun to tighten the crankshaft pulley bolt.

Remove the fender splash shield.

Place the crankshaft pulley onto the crankshaft with the guide hole at the 6 o'clock position, aligned with the guide hole on the timing chain cover. Install a 6 mm bolt into the crankshaft guide hole and thread the bolt through the pulley and into the timing chain cover guide hole.