If clearances are too tight you can burn up the bearings.
Not saying this is your problem just something to look into.
What causes a spun main bearing. Had them replaced two years ago. I have a 509 ci with a Vortech, intercooled. 10qt Hardin Marine oil pan and a high flow oil pump. I had good oil pressure. I was cruisin at 4800ish rpm. Its a steel crank. Any advice? I am getting sick of fixing shit
If clearances are too tight you can burn up the bearings.
Not saying this is your problem just something to look into.
oil on the backside during install can cause this...thats just one thing...
Initial tolerances/clearances could have been off...these need to be checked or verified during the build up. Also, using a standard bearing instead of a performance bearing can lead to this. Performance brgs, even with the same clearance, are designed different to prevent this from happening in higher hp applications.
or a junk oil pan
Thanks guys
What was your oil temp when this happened ?
whoever rebuilt it last time, shouldn't do it the next time.
Crap in the oil cooler?????????
whoever rebuilt it last time, shouldn't do it the next time.
I have already decided this...