Lincoln F4AZ-6701-A Seal Assy - Crankshaft Oil

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To replace the front crankshaft seal with the timing chain cover in place, start by removing the fan shroud and the fan/clutch assembly, as well as the drivebelts. Extract the bolt from the front of the crankshaft and use a puller to detach the vibration damper. The crankshaft front seal can be removed using a special tool or, on most engines, with a small chisel and hammer, being cautious not to damage the cover or the seal bore. Apply penetrating oil if needed. Inspect the seal bore, crankshaft, and vibration damper for nicks and burrs. Install the new seal with the open end facing inward, using a special tool or a large socket and hammer. If installing a new vibration damper, ensure proper balance pin alignment and apply clean engine oil and RTV sealant. Install the damper on the crankshaft, aligning the keyway, and secure the remaining components. For engines with the timing chain cover removed, carefully drive the seal out using a punch or screwdriver, clean the bore, and install the new seal with a large socket and hammer. For the rear main oil seal, the procedure varies for one-piece and two-piece seals. For a one-piece seal, remove the transmission, detach the driveplate and rear cover plate, pry out the old seal, clean the crankshaft and seal bore, apply oil and grease to the new seal, and press it into the bore. Reinstall the components. For a two-piece seal, remove the oil pan, loosen main bearing cap bolts, and carefully install the upper and lower seal halves with proper protrusion. Apply RTV sealant, install the rear main bearing cap, and tighten the bolts. Complete the installation in reverse, fill the engine with oil and coolant, start the engine, and check for leaks.

Clean off any old gasket or sealant material from both the engine block and the seal retainer.