Engine Assembly Woes

[El Camino Man]

Hey guys. I figured Id start reassembling my 6.2L after tearing it down to the long block and swapping out a piston. VERY first thing I do is, of course, torque down the cap on the new rod. I then decide Id better try turning the motor over to make sure its ok. Its locked up tight. So I pull off the cap, turn it around, reassemble it, don't even torque it down yet, and its still locked up. So I take off the cap again, spray the bearings down with WD-40, put the cap back on loosely, turn the motor over 360* to make sure its well lubricated, tighten it down without torqueing, and its still stuck. WTF??!!

 

[SlickGTP]

My next thought would be if it spins without the cap on...

Edit: you said that you had... Next.... which bearing size are you using and is it the right one? have you mic'd the rod journal and and rod?

 

[MrMarty51]

Yeah, sounds like wrong bearings for that cranking shaft.

 

[El Camino Man]

It spins without the cap and I took the bearings off the rod I took out of it

 

[MrMarty51]

It spins without the cap and I took the bearings off the rod I took out of it

Try torquing it with some plastiguage between the bearing and crank, see what it gives You for clearance.
Check the bearing to see if it is an undersized bearing, It`ll be marked on the back side, it might be a ten or twenty under bearing and Your cranking shaft could be a standard.