Matt0matic

Here are some pictures of a main bearing, they all look like this.





Now, I'm planning on cleaning everything up, reassemble , and running it as-is unless I get advised otherwise. What do you think? I thought they look excellent; but I am not a professional engine builder by any means.

Che70velle

iTrader: (6)

yeah matt, its hard, if not impossible to eyeball bearing wear with any form of exactness. I'd do some measuring. And also, there are TTY fasteners all through these ls engines. I think the rod bolts are reusable, don't quote me on that, but I believe the main bolts have to be replaced, once torque is removed, as do the head bolts. You should do some research if your not sure which bolts can, or cannot be reused. TTY=torque to yield.
Is this a low mile engine?

Austinma62

they look good to me, usually you look for piting and groves that are worn in to the bearing. however the overall thickness may be a problem, so a way to measure would tell you for sure.

Austinma62

and far as I know with the main bolts, they are reusable but you have to torque them down first to 18ftlbs i think starting with the inner bolts then stretch them after that using the tool that measure degrees. cant remember the exact specs but a gm manual or someone else might be able to help with that

Matt0matic

Mains are not TTY the head bolts are. The rod bolts will be replaced with Katech (?). No pitting, really smooth and zero copper color.