what happened to my main bearings?
#1
what happened to my main bearings?
I was at the track over the weekend and after the last couple of runs and on the ride home i noticed my oil pressure was lower than normal and when I cracked the throttle the pressure dropped. I changed the oil and cut the filter up and sure enough there were tons of copper shavings. I pulled the motor down and found that my thrust bearing and the one in front of it were fu--ing fried. the cap side of the bearing was actually cracked!! and they all looked like they were heated. the rod bearings looked decent and the motor dident make any noise. The line bore was out .001-.0015 I was playing around with crankcase ventalation at the track. and my oil was 5/30 with around 3000 on it. did I boost the crankcase and lift all the oil? maybe I twisted the mains? Im running arp studs and the berrings were clevite 77s. the shops I talked to were puzzled that I had this problem at my horsepower level.
#6
take a look to see if your converter has pushed (ballooned)against the crank.The rear main would have gone first,and the one next to it after.
I would have more clearance on the rear main..003" to .0035" is good....
I would have more clearance on the rear main..003" to .0035" is good....
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#9
Originally Posted by lmt0705
its a 6 speed car, why would I want more clearance on the rear main, or do you mean the thrust bearing? anyone else have any ideas on what happened?
I like Brad Penn oil.It helped us a lot.We now use Castrol Edge 25w/50 with good success...