bolt pattern for g260/5 trans
bolt pattern for g260/5 trans
Does anyone have pictures of the bellhousing bolt pattern for the M20 and M30 bolt patterns? I got a 535is that came with a manual trans conversion but am not sure if its for the M20 or M30. Its definitely a 260/5 due to not having the finned case but i dont know what it came out of and the previous owner didnt know either. If its for an M20 i dont want to take my car apart just to find out.
Re: bolt pattern for g260/5 trans
post a pic.
Re: bolt pattern for g260/5 trans
Im not near where the car is stored at the moment so cant get a pic of the trans I got. I was just wondering how one can distinguish between the m30 or m20 version
Re: bolt pattern for g260/5 trans
I believe M20s use all 12MM mounting bolts but M30s use a mix of 8 and 10MM bolts. I'm sure on M30s. Realoem bears me out on M20s, but I've never pulled one.
Re: bolt pattern for g260/5 trans
Is the OP asking about manual trans conversion parts that have NOT yet been installed?
I have saved a pair of bell housings from both an M20 and M10/M30 automatic trans and iirc it is pretty easy to tell the difference just by the width where it meets the block below the head or the width between those two bolt locations. If I remember when I get home I will measure.
I have saved a pair of bell housings from both an M20 and M10/M30 automatic trans and iirc it is pretty easy to tell the difference just by the width where it meets the block below the head or the width between those two bolt locations. If I remember when I get home I will measure.
Re: bolt pattern for g260/5 trans
I can confirm the two are quite different. If you can measure across the raised rectangle section just under the head one is about 12cm and the other 14cm bolt spacing. It might be opposite of what I had in my head, big block is smaller bolt spacing and small block is wider. And yes the M20 appears to use larger bolts all around and the M10/30 smaller and mixed in size.
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Re: bolt pattern for g260/5 trans
M20 uses four 12mm bolts at the block and two 10mm bolts at the starter.
M30 uses 4 10mm bolts at the block and two 10mm bolts at the starter. seems like i recall there being a "V" notch near the starter, that i never saw on an M20 bell housing, only the M30.
hope this helps!
M30 uses 4 10mm bolts at the block and two 10mm bolts at the starter. seems like i recall there being a "V" notch near the starter, that i never saw on an M20 bell housing, only the M30.
hope this helps!