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(#1)
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8 bolt to 6 bolt longblock swap question -
03-06-2017, 12:13 PM
I have a 2010 335i that needs a motor. The previous owner hurt it somehow, I bought it with a hurt rod bearing. My 2010 apparently has an 8 bolt crankshaft, can I use an earlier 6 bolt crank motor or is that more trouble than it's worth? The reason I ask is because I am having a harder time finding an 8 bolt crank motor. The earlier N54's seem to be much more prevalent. Thanks guys!
I have not had time to pull the motor out yet because of other car projects I've had going on so I me have the 8 bolt and 6 bolt thing backwards. It is not easy to find information like this online unfortunately. 2007 E92 335i, FBO Jb4 - Sold 1999 C5 Corvette single turbo 5.3 
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(#2)
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03-06-2017, 02:06 PM
swap the flywheel/flex plate. that's it.
832-797-9114
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03-06-2017, 06:26 PM
Quote:
2007 E92 335i, FBO Jb4 - Sold 1999 C5 Corvette single turbo 5.3
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Doing same -
06-24-2018, 07:24 PM
Hi AndyG, Did you go ahead with this. Any issues? what exactly did you swap. Doing same myself.
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06-25-2018, 07:43 AM
Quote:
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s! It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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(#7)
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07-27-2018, 01:33 PM
Correct you will only need to swap flywheel, it only gets complicated when you have a twin disc clutch. Also you have the 6 bolt vs 8 backwards, early motors are 8 bolt, later are 6 bolt. Your car should have a 6 bolt.
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