main bearings

Bought a Used 1990 Wrangler with the 4.2 L6 258. Three weeks after purchase lost most of the oil pressure so I decided to rebuild the Motor. After getting a new crank from a reputable machine shop and buying appropriately undersized bearings, .020 under for Main and Rod, After installing the new...

Hello, I have a 99 grand cherokee limited with a 4.7 v8 4x4. It started making a knocking sound. It was faint at first and slowly got louder. It never lost any power though. I finally took it to a local repair shop. they told me it was a main bearing and I need a new motor. on the way home...