The easiest repair is to replace the engine. Otherwise the crank shaft will need replaced/remachined and the connecting rod will need replaced. Basically a complete overhaul.
If the bearing has not spun or seized, you drop the oil pan, take the rod cap off of the rod and put the new bearing in. The bearing is in two pieces, half in the rod and half in the rod cap. If the bearing has spun, you should remove the crankshaft and either have the rod journal polished or machined for a thicker bearing.
Only if it all leaks out.
A spun--Bad rod bearing. NO OIL PRESSURE.
Bad enough that the oil pan will have to be removed and the rod bearing replaced if that is all the damage that has been done. You will also need to find out why this happened.
bad oil pump or a spun rod\main bearing
lifter tick or a spun rod bearing
Most typical are spun rod bearings and scored bearing surfaces, increasing to knocking due to loose bearing, then piston rod breaking and cracking the block.
Most likely a spun rod bearing, dont let anyone say that its a wrist pin, its not.
If a rod bearing actually spun and seized up you are looking at a total engine rebuild.
Rod bearing (short for connecting rod bearing) Is the bearing where the connecting rod is attached to the rotating crankshaft.
The term SPUN means that the bearing has broken free from it's normal set spot in the cap and is badly spent. The rod or bearing cap or both may need to be replaced or maybe both.This usually only happens after extreme wear and abuse so be prepared for a total engine rebuild.
i have a 2000 ford expedition with a 4.6 in it,i had ENGINE KNOCK AND WAS TOLD IT WAS A SPUN BEARING ON THE CRANK SHAFT,UPON ALITTLE MORE DIGGING I FOUND THAT THE RETAINER CLIP ON THE LIFTER HAD POPPED OFF AND BENT THE PUSH ROD AND THE ROCKER ARM.ALOT CHEAPER THAN A SPUN BEARING