Linden 0 Report post Posted February 6, 2011 Hey guys ive run into a bit of strife, when my flywheel broke the stretched ringring gear attacked my starter motor, in the process of getting a new one I have run into the following problems, (m20 flywheel, m50, e36 zf 5sp box) starter motor 1 too big and chunky and hits the m50 block so wont go in. starter motor 2 right size but wont engage the flywheel Running m20 flywheel and i noticed the one i had in there originally had smaller teeth and 10 of them, the 2 ive got to try make work have 9 slightly chunkier teeth. Original is 10teeth Marelli E70R14/12 63223433 Any ideas anyone?! looks like this (found on ebay) http://i.ebayimg.com/16/%21B8Dl%218%21Bmk%...21%7E%7E_12.JPG Quote Share this post Link to post Share on other sites
thorburn 121 Report post Posted February 7, 2011 When you use the m20 flywheel behind the m50, you have to gut the m50 starter and put the m20 starter gear bits inside it. Think I saw a complete step by step write up on rev Quote Share this post Link to post Share on other sites
Jacko 2157 Report post Posted February 7, 2011 I just ground a chunk outta the rib on the block, big old skool starter bolts up fine to the M50/260. Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted February 7, 2011 the later m20 engines use a smaller starter like form a face lift 320i 325i or 34 520i 525i m20 type Quote Share this post Link to post Share on other sites
westy 614 Report post Posted February 7, 2011 Try this and report back. Back the starter bolts off till the locating pin at the top of it is clear. Slip a 1mm washer between starter and gbox housing over the locating pin so it doesn't fall in. Tighten starter. Start motor. Quote Share this post Link to post Share on other sites
Linden 0 Report post Posted February 7, 2011 the later m20 engines use a smaller starter like form a face lift 320i 325i or 34 520i 525i m20 type yup got one of those sent down but it wont engage (checked engaging without it bolting up Try this and report back. Back the starter bolts off till the locating pin at the top of it is clear. Slip a 1mm washer between starter and gbox housing over the locating pin so it doesn't fall in. Tighten starter. Start motor. tried this also with no success, for some reason the starter with the bigger teeth wont engage which leaves me stumped.. is the ringgear on a e36 flywheel slightly smaller in diameter than a m20 therefore starter starter sitting closer on the gearbox?? just got it turning over with original starter i had with the 10 smaller teeth and bolted the solonoid from another one on, too much rain now to finish though so ill have to report back later. Quote Share this post Link to post Share on other sites
Linden 0 Report post Posted February 7, 2011 so my temp solution didnt work too well.. Alright so thought itd be easier to show you with pics, one is the starter that ran in the car, the other is the m20 starter i got sent, as you can see the other 9tooth m20 starter doesnt bind with the ring on the flywheel??? m20 starter 10 tooth original running the car Quote Share this post Link to post Share on other sites
Silver Fox 43 Report post Posted February 7, 2011 (edited) What Brent said, we run a M20 flywheel in the M54B30 race car with a later small E30 320i starter with no problems at all. Pretty sure you'll find the 9 tooth is from an M30, they have 9 teeth and a bigger tooth on the flywheel for them. Edited February 7, 2011 by Silver Fox Quote Share this post Link to post Share on other sites
Linden 0 Report post Posted February 7, 2011 Ok so I just did the logical thing and looked up the part numbers just to make myself look like an ass, the one I bought that is too fat to fit is m30, the other one that got sent from welly is m40 just my luck haha! Quote Share this post Link to post Share on other sites
polley 916 Report post Posted February 7, 2011 When you use the m20 flywheel behind the m50, you have to gut the m50 starter and put the m20 starter gear bits inside it. Think I saw a complete step by step write up on rev Or you could just use the small m20 starter. Quote Share this post Link to post Share on other sites
Silver Fox 43 Report post Posted February 7, 2011 Or you could just use the small m20 starter.Correct, we didn't gut anything. Quote Share this post Link to post Share on other sites
Jono51 59 Report post Posted February 8, 2011 M30 and M40 starters will not work with the M20 flywheel, whomever sent you that has put you wrong don't even bother swapping gears like Brent has said, small M20 is what you need give me a call if you get stuck, or someone else here will have a starter cheers Jon Quote Share this post Link to post Share on other sites
Linden 0 Report post Posted February 8, 2011 Finally sorted and after that frustration the beast is back on the road, i cant believe the two starters i got (i asked for m20 on both) ended up being something else lol Cheers for the input ;D Next on the list is figuring out how to make a lsd have more lockup without paying the diff man excessive amounts of $$ Quote Share this post Link to post Share on other sites
