Pulled my engine out of the '62 C10 today. I developed a knock in the low end on Monday. Looks like it's time to do a full rebuild. After I dropped the pan, I didn't find any major chunks of metal, but I did find the issue.

The number 7-8 Rod journal on the crank was hammered. Probably caused by the number 7 rod bearing which was extremely worn and missing a chunk of bearing material and the number 8 rod bearing which had spun in the rod and was wafer thin and both halves were nested on the rod side of the crank.

Looks like I will be doing a full tear down and rebuild. This is an RPO L30 Spec. engine, (275hp). I think I will rebuild it to the RPO L79 Spec. (350hp)

I also found 2 of the expansion plugs were almost completely rusted through. One was on the back of the block behind the flywheel. I would have had to pull the engine to fix that one any way. I had already replaced 2 plugs over the last 6 months. I guess it was time.
Attachments
327_7-8_RodJournal_small.jpg (280.94 KB, 217 downloads)
327_7_RodBearing_small.jpg (291.98 KB, 216 downloads)
327_8_RodBearing_small.jpg (265.22 KB, 212 downloads)

Dave

1963 C10 Longbed Fleetside (1977-1987)
1962 C10 Shortbed Stepside (2003 - present)
2006 2500 Dodge Quadcab 4x4 (2007 - present)