Just in my case. Yes the cams seized (actually the drive gear for the cams seized, locking the cams). But when I tore it apart the main & rod bearings (2 total) were just starting to show signs of starvation. I was able to have the crank polished & saved it. No way would I have wanted to put it together without polishing the crank & new bearings. BUT, the reason the engine (please don't call it a MOTOR) was using oil was the oil rings were all carboned up in the ring lands & just letting the oil go right past them & into the compression rings. So if you just rebuild the top end the same oil consumption will still be going on. I bored my block, new oversized pistons, drilled the extra holes in the new piston ring lands & put her back together with new heads. I was actually able to reuse the cam shafts. Like I said they didn't seize, just the intermediate gears.