Mileage on Cam Bearings
#5
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It really depends how well maintained, how hard your car was driven, what type of cam and spring pressures you were running with, and if the cam swap was ever done if they got nicked.
Mine looked good at 140k when I rebuilt, but the car was 100% factory so idk.
Mine looked good at 140k when I rebuilt, but the car was 100% factory so idk.
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A bad cam bearing will be severely with either groves, gouges, be out of round, or discoloration. To pull them out the crank really needs to come out so you can see what you're doing and to drop the bearings in and hook them to the tool. They sell a cam bearing drive tool that you really need to have to install them, if you don't have one it needs to go to the machine shop. Also a spun cam bearing could have possibly trashed the block and at very least will need to have the cam journals line honed.
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Like copper colored? If they ate all the way down to the copper level, yeah they're shot, but I don't think LT1's came from the factory with any copper/lead bearings I thought they were all aluminum...
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What exactly do you mean by freshen up the bottom end? If you are thinking about doing what I think you are, you might as well drop the motor and do a full rebuild...you can't simply pull the crank and install new main and rod bearings, you need to get the block machined.