Crankshaft pulley/vibration damper – removal and installation

1. Disconnect the cable from the negative terminal of the battery (see Engine electrical systems).

2. Drain some coolant (see Tune-up and routine maintenance), then remove the upper radiator hose. Remove the cooling fans and shroud together as an assembly (see Cooling, heating and air conditioning systems). Caution: Store the fan assembly vertically. If it’s horizontal, the fluid can seep into the bearing and damage it.

3. Remove the drivebelt (see Tune-up and routine maintenance).

4. Use a strap wrench around the crankshaft pulley to hold it while using a breaker bar and socket to remove the crankshaft pul­ley center bolt (see illustration).

12.4 Use a strap wrench to hold the crankshaft pulley while removing the center bolt (a chain-type wrench may be used if you wrap a section of old drivebelt or a rag around the crankshaft pulley first)

RAM Trucks 3.7L V6 and 4.7L V8 engines Use a strap wrench to hold the crankshaft pulley while removing the center bolt (a chain-type wrench may be used if you wrap a section of old drivebelt or a rag around the crankshaft pulley first)

5. Pull the damper off the crankshaft with a three-hook puller (see illustration). Caution: The hooks of the puller must only contact the hub of the pulley – not the outer ring. Also, the puller screw must not contact the threads in the nose of the crankshaft; it must either bear on the end of the crankshaft nose or a spacer must be inserted into the nose of the crank­shaft to protect the threads.

12.5 The use of a three jaw puller will be necessary to remove the crankshaft pulley – always place the puller jaws around the pulley hub, not the outer ring

RAM Trucks 3.7L V6 and 4.7L V8 engines The use of a three jaw puller will be necessary to remove the crankshaft pulley - always place the puller jaws around the pulley hub, not the outer ring

6. Check the surface on the pulley hub that the oil seal rides on. If the surface has been grooved from long-time contact with the seal, replace the pulley.

7. Lubricate the pulley hub with clean engine oil. Align the slot in the pulley with the key on the crankshaft and push the crankshaft pulley on the crankshaft as far as it will go. Use a vibration damper installation tool to press the pulley the rest of the way onto the crankshaft.

8. Install the crankshaft pulley retaining bolt and tighten it to the torque listed in this Chapter’s Specifications.

9. The remainder of installation is the

reverse of removal.