Been looking for a new motor since mine has low compression on a cylinder. Will a M10 out of a 320i fit into my 318i?
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320i motor into 318i?
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hey boostless, welcome to r3v. i dont see why not, same engine right? on the older motor would have a carb . The 318i's m10 is desegnated m10b18 whereas the 320 is a m10b20.
this has more information http://www.r3vlimited.com/board/showthread.php?t=222636 according to the link motor mounts may differLast edited by Rockwool2117; 06-07-2013, 10:56 AM.The day I bought my e30, was the day I became sophisticated and classy as fuck.
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From what I have read, all US spec E21's are M10 equipped. Only the euro market got the M20b20.1985 M10b18. 70maybewhpoffury. Over engineered S50b30 murica BBQ swap in progress.
Originally posted by DEV0 E30You'd chugg this butt. I know you would. Ain't gotta' lie to kick it brostantinople.
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I have an e21 motor in my car right now. It'll bolt up just fine using the same transmission and motor mounts. The only thing that didn't fit right was the splash shield for the transmission because the block didn't have the same bolt holes. It'll still bolt to the transmission though and stay in place just fine.Last edited by thebutterson; 06-11-2013, 08:44 PM. Reason: edited, meant to say the block didn't have the same bolt holes
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Wait, what?
The earlier US E21 got an M10b20, the later (post '79-something) got an M10b18.
The M10B18 is dang near identical in the E21 and E30... same head, pistons, crank,
and the block's interchangible but a different casting- all the same bosses, just slightly
different gussets and a bit heavier.
Yup, we weighed a lot of M10 blocks over the years...
tnow, sometimes I just mess with people. It's more entertaining that way. george graves
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If anyone is interested in an M10B20 (out of a '77 e21 320i), hit me up. I have one complete engine, turns fine though never started it (came in the 320i project car I just got and am engine-swapping). Located just outside D.C.....make an offer and come get it :)Stage rally/rallycross e30 build/competition journal
Track/street e21 build
visit Condor Speed Shop
visit Motorsport Hardware
[FONT="Franklin Gothic Medium"] 1985 318i/M50 Rally Car - 1988 Porsche 924S - 2005 Sequoia tow pig - 2018 GTI
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What I did was put a 1.8i head on the e21 block, so I never had to worry about it. The best thing to do now would be to swap the distributor gear from the 320i onto the 318i distributor and set it up as normal. Have you verified there is no spark, or does the car just not start? I'm not sure the l-jet will work correctly if it's not getting the rpm signal from the distributor.
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