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AndyG AndyG is offline
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Default 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 E90 335i, single turbo, daily driver
2007 E92 335i, FBO Jb4 - Sold
1999 C5 Corvette single turbo 5.3
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Alex@abrhouston Alex@abrhouston is offline
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Default 03-06-2017, 02:06 PM

swap the flywheel/flex plate. that's it.


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AndyG AndyG is offline
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Default 03-06-2017, 06:26 PM

Quote:
Originally Posted by Alex@abrhouston
swap the flywheel/flex plate. that's it.
Thanks Alex, that's what I needed to know.


2007 E90 335i, single turbo, daily driver
2007 E92 335i, FBO Jb4 - Sold
1999 C5 Corvette single turbo 5.3
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Bmstation Bmstation is offline
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Default 03-11-2017, 06:51 AM

01/2009--> have six bolts
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mixhali mixhali is offline
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Default 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.


09 e92 335 AT - MHD Flash, RB's, TFT intake w/Tial BOV, Fuel It Stage 2 pump, Wagner EVO 2 FMIC. VRSF DP's, JB4 + Mobile
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Payam @ BMS's Avatar
Payam @ BMS Payam @ BMS is offline
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Default 06-25-2018, 07:43 AM

Quote:
Originally Posted by mixhali
Hi AndyG, Did you go ahead with this. Any issues? what exactly did you swap. Doing same myself.
Flywheel or flexplate is the only thing that will need to be swapped.


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1985gsl 1985gsl is offline
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Default 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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