Can you describe the circumstances, and was it a main or rod?

 

It can affect oil pressure. Possibly won't see lower pressures until oil is at operating temp. There may be noise associated. The tell all is draining your oil/cutting your filter (with a special filter cutting tool) to see if there is bearing material where it should not be. What's going on to make you think you spun a bearing? What you don't want to do is run the engine until it's fixed. The more you run it with what could be a spun bearing the more damage you can do.

 

Hi SS RRR, thanks for the reply, all good info. I could have been more clear in the OP, for some reason my poll didn't work...

What I'm trying do is ask people who have had a bearing failure whether it was a rod bearing or main bearing, and under what circumstances did the failure occur? Circumstances meaning, how high of rpm were they turning, was their oil contaminated, etc.

I'm just gathering information. I have heard of many LT1 rod bearing failures, but not many main bearing failures. I'm wondering if that's an accurate trend and they typically only spin rod bearings, or if those are just the ones I happened to hear about.

So, ye bearing spinners, tell me your stories!

 

Spun a rod bearing after an LT4 hotcam swap.

 

Yes it's at least uncommon for LT1 crank bearings to spin unless there is a lack of oil flow or power adder abuse. Cam and rod bearings are much more common to fail, and that usually happens after installing something where the engine is opened up and debris falling into the engine are overlooked. Also over revving causing rod bolts to stretch which can destroy rod bearings can be an issue for these engines when stock. Rule of thumb has been to not spin over 6500rpm. I've found shifting at that rpm is fine, but don't sustain that RPM for any amount of time. Especially at the age a stock LT1 would be at now.