m50/g260 question

[jeds320i]

ah man this sucks :( how much material do i gotta take off? 1/4"? man.. any machine shop should be able to do that right?

[ethrty]

yup anyone should be able to do it. BMW usually uses the clutch side to balance the flywheel as well so you may be able to get away without getting it balanced, mine was still inside spec and i got the back shaved down to the ring gear (aka starter wheel teeth)

[jeds320i]

its funny i didnt catch the flywheel hitting the block after i installed it.. im sure i wouldve noticed it so im really frustrated now that i made a huge mistake. i hope my aluminum flywheel can be machined down properly

[ethrty]

its funny i didnt catch the flywheel hitting the block after i installed it.. im sure i wouldve noticed it so im really frustrated now that i made a huge mistake. i hope my aluminum flywheel can be machined down properly

I didnt notice either! flywheel still goes on straight and adequate amount of bolt tighening i thought nothing of it. you might want to investigate the weight of your flywheel, and take around 30-40% of the weight off that (assuming you are shaving to the ring gear) and make sure its still going to be over 7lb. anything less than that and dont waste your time. sell it and buy a standard single mass M20 and shave that down as i hear the idle will be terrible, if it even does idle. stock is aroun 19lb iirc

[jeds320i]

is there anyway to maybe add a spacer between the flywheel and crank so it sticks out a tad more maybe? im not really sure if my aluminum fly can get milled down..

[M-technik-3]

Mill down the oil pan is the other alternative.

[jeds320i]

how much material are we talkin? 1/16"? 1/8"? 1/4"? i wood much rather touch the oil pan than the spendy aluminum flywheel..

[ethrty]

grinding down the oil pan is not the safest option. With that flywheel spinning at 7000rpm, i would not want it THAT close to my engine block. if it warped from an over enthusiastic launch or something that shit could take a leg off.
Sell Ally, Buy M20 single mass, grind down to ring gear, install. Id be surprised if there is much of a weight difference between them anyway in terms of weight

[jeds320i]

Could i maybe mill down the oil pan a lil bit and add a small spacer between the crank and flywheel? i dont see this as being a very big problem.. :/

[JGood]

Could i maybe mill down the oil pan a lil bit and add a small spacer between the crank and flywheel? i dont see this as being a very big problem.. :/

No. I'd think this would mess with starter tooth mesh, clutch engagement, and who knows what else.

Just shave the flywheel., or grind down the pan. Both have been done many times, and are documented in numerous threads on this forum. I chose the flywheel because it's rotating weight reduction, and because I don't like the idea of grinding the pan so thin.

[ethrty]

No. I'd think this would mess with starter tooth mesh, clutch engagement, and who knows what else.

Just shave the flywheel., or grind down the pan. Both have been done many times, and are documented in numerous threads on this forum. I chose the flywheel because it's rotating weight reduction, and because I don't like the idea of grinding the pan so thin.

+1 to all of that

[jeds320i]

Well guys i finally pulled out my motor, took the tranny off, then the clutch/flywheel and found the problem. The bolts they gave me with the flywheel are to long. they were hitting inside the motor somewhere makin it not turn. and as far as clearance issues go, there are none. with the Aasco aluminum flywheel i got the gap between the block/oil pan is absolutley fine. no milling or shaving required. thats y i was skeptical when u guys said i had to shave it down bc i was almost positive i had room lol. I still got the fly bolts that came with the motor and theyre shorter so they'll work. just thought id update for u guys.