7 on the right, 8 on the left. Every bearing clearance was within .0023 to .0025 on the rods and mains. Damn, I didn't get a pic of the mains at all. I also had to clean up my mess in the garage so I was on a time limit.I assume this is 7 and 8 rod bearings, when you checked the bearing clearance did you check both halves and the center and both edges? What does the last main look like...
Criticism, bad or good, has it's roots in good intention. I never messed up that bad. Worst thing I did, aside from the dumb oil pressure thing, was drop my damn feeler gauges in the motor on the stand so I had to take the 67lb intake off for a 4th time that day. Since the motor was fine up until I started really beating on it, WOT for minutes at a time on the highway, revving it to 6k all the time, I think the engine just had enough of my shenanigans. And as I found out, it ripped the tang right off the bearing. Whether that tang ripping off was just a normal part failure, or a 6,000 rpm wot for minutes at a time failure, I don't know. But knowing what I know now, I think I can prevent it happening again. With a rev limit of a safe 5200-5500, and less jackassery, if the next rebuild goes the same way, then something needs to be addressed. It was a BONE STOCK bottom end nonetheless. Just new bearings. Clearances checked out good so I slammed it together. Buick never designed this motor to go over 5,000rpm, let alone to 6k and beyond. It's completely different from any of it's GM stable mates in the oiling department. It was just meant to be a "fuel efficient" engine to carry a large car down the highway at 55mph tops.
Steve, you might not have seen, but he indicated above that other than these two rod bearings, the bearings (mains and rods) looked 'almost new'. I applaud your efforts to try to help him avoid suffering the same failure again.I assume this is 7 and 8 rod bearings, when you checked the bearing clearance did you check both halves and the center and both edges? What does the last main look like...
