This is what we refer to as a bottom end.. This would be my motor On the back of my friends truck.. If you look you'll see the 8 Bolts.... This would consist of the Main bearing caps and crankshaft as well as connecting rods.. That would be the bottom end..
In this pic, on the lower left you'll see a bolt, The bolt is holding the rod bearing cap, To the right you'll see the Crank journal is not smooth, the bearing spun and ate up the metal of the crank
The Journal should look like this
This would be a bad rod bearing
This one is a little better but not healthy..
When the bearings wear like this it can cause the motor to tighten up, and also cause the oil pressure to drop... That would be a Bottom end.. And it sounds like yours is done..
I always say it would be easier if I could take a look at it.. But from what you have described, it doesn't sound good..
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