REMOVAL & INSTALLATION
See Figures 1 through 11
- Disconnect the battery cables at the battery.
- Remove the radiator and fan shroud as outlined in the Engine Cooling information.
- Remove the drive belts, cooling fan (engine-mounted only), and fan pulley.
- Remove the cooling system drain plugs from the engine block and allow the coolant to drain.
- Disconnect the brackets and hoses from the water pump and remove the water pump.
- Remove the pulley from the crankshaft damper. Also remove the center bolt from the damper, if so equipped.
- Using a puller, remove the crankshaft damper.
- On 1974 and earlier small-block models only, remove the oil pan as outlined in the Engine Lubrication information.
- Remove the timing cover retaining bolts and remove the timing cover.
- Clean the gasket mating surfaces of the water pump, timing cover, engine block, and oil pan.
Perform steps 2 and 3 only if the oil pan was not removed.
- Using a sharp knife, cut the protruding oil pan gasket material flush with the front of the engine block.
- Apply a 1 / 8 " bead of RTV sealer to the oil pan-to-engine block front junctions (where the excess gasket was previously removed).
- Coat the new timing cover-to-oil pan seal and lightly coat the lower portion of the seal with engine oil.
- Install the timing cover (with gasket and seal). If the oil pan is installed, press downward on the cover to position the cover over the engine block dowel pins. Dont force the cover over the pins.
- Install and tighten the cover retaining bolts. If the oil pan is installed, visually check that the cover gasket and seal did not distort after the bolts were tightened. Also check that the sealer applied during step 3 compressed, indicating a good seal.
- Install the oil pan at this point, if it was removed previously. Be sure to apply a small amount of sealer where the oil pan side gaskets meet the front and rear seals.
- Oil the crankshaft seal and clean both the crankshaft snout and the bore of the damper.
- Lightly oil the damper bore and the crankshaft snout. Install the damper, using a tool that will pull the damper onto the crankshaft. It is not recommended to hammer the crankshaft into place.
- The remainder of the assembly is performed in the reverse of steps 1-6 of the Removal procedure. Be sure to fill the cooling system, adjust the tension of the drive belts, and check for leaks after the engine is started.
OIL SEAL REPLACEMENT
See Figures 12 and 13
The timing cover oil seal may be replaced without removing the timing cover. Follow steps 1, 2, 6 and 7 of the Timing Cover Removal procedure to gain access to the cover. Pry the old seal out of the cover, being careful not to damage the cover itself. Install the new seal so that the open end of the seal is toward the inside of the cover. Drive the seal into place using a seal driver. If the seal is to be replaced with the cover removed, support the rear of the cover while driving the seal into place.