I need to figure what to do. Feels like I need to pull motor out and start digging into it which I don't really want to do if not necessary. I asked this on a Pontiac forum, and a couple people said they had gold shavings in oil from tight cam bearings at assembly, and it ended up fine. I'd like more opinions. 1st oil change was break in at dyno. 2nd oil change was at 400 miles 3rd was yesterday at 2,100 miles Rebuilt Pontiac 455 with original polished crank, new rods and pistons. Hydraulic roller cam with composite gear. Runs great. Good oil pressure (50 psi at cruise, 25 psi idle, 75 psi cold cruise). No knock. Winds up nicely under load. Manual trans with street/strip type diaphragm style clutch. Pouring used oil from drain bucket into my waste bucket, I noticed gold flakes at bottom of drain bucket. Bucket was clean before oil change today, this all came out drain plug. See picture. Cut open filter, there is nothing in pleats. Some iron dust collected on the wall where I keep a powerful magnet wrapped around filter, but about the normal amount to expect. I did not run a sacrificial bronze distributor on roller cam - went straight to composite gear and it still looks like new. I've always had this strange squeal that sounds just like a loose belt. Only makes the noise accelerating under load between 2,000 & 4,000 RPM. I posted here about that noise and never found the source. Video from 900 miles ago (still sounds the same): http://www.youtube.com/watch?v=T_t8tdY5T4E&feature=g-upl Thinking it was thrust bearings, I wanted to check crankshaft end play. I set up a dial indicator on block, pried back on front dampener bolt, then stabbed at clutch. Repeatedly was .007" which is in spec (assuming this is an appropriate way to check). Engine builder is reputable and knows Pontiac well. Nothing struck him as obvious, but he agreed it was concerning. He suggested driving 500 miles and checking again. I don't think I can get 500 miles in before putting it away for Winter. My time is going to be super tight next Spring/Summer compared to right now. If this needs to be pulled I'd like to get started ASAP, but it sounds like it might be something to just not get too excited about? Crap. What would you do?