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Main/Rod bearing question

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Old 08-03-2014, 08:39 AM
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Default Main/Rod bearing question

I picked up my block from the shop yesterday, and noticed they put different bearings in it. I looked at them this morning, and they seem to be Bi-metal bearings. The part number on the main bearings is 4115AU and the rod bearings are Speed Pro 8-2555A 10. I can't find any information on either one of these bearings, as to whether they are just OE replacements, or whether they will work with an aftermarket crank. Any ideas?
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Old 08-03-2014, 10:43 AM
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After putting the crankshaft in the block, and trying to get it to spin, it won't even do so regardless of the main caps being on it or not. I'm going to have to get my bearings back from them tomorrow.
Old 08-03-2014, 11:53 AM
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They should have had your crank to size the bearings for it.
Old 08-03-2014, 12:12 PM
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They had my crank, block, and main bearings. It ended up needing a line hone and I had them hot tank it. Sounds like a QC issue to me.
Old 08-03-2014, 04:50 PM
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I'm surprised then they didn't catch that. My shop is working my block right now and is checking for line hone, decking and everything else so I can just bolt it together. He showed me one build sheet where they even put in a different sized bearing for one journal to have the clearances all match



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