M10 to M42 Getrag 240 mechanical speedo conversion

alschux
Upcoming E21 fanatic
Posts: 96
Joined: Mon Dec 17, 2007 6:46 pm
Location: Innsbruck, Austria

Re: M10 to M42 Getrag 240 mechanical speedo conversion

Post by alschux »

This is a great piece of work, got me thinking about the M42 swap all over again!


nuke laars
Upcoming E21 fanatic
Posts: 58
Joined: Tue May 01, 2012 1:54 am
My E21(s): 1983 Baltic Blau 316
Location: London

Re: M10 to M42 Getrag 240 mechanical speedo conversion

Post by nuke laars »

Would I be right in thinking that you could just source a bellhousing from the more common getrag 240 (E30 318i) seeing as you can bolt an M42 straight to it?
1983 Arctic Blau 316
1989 Sterling Silber 318i
User avatar
Sierpien
E21 Fanatic
Posts: 238
Joined: Wed Feb 22, 2006 2:21 pm
My E21(s): C1 Turbo Alpina tribute, 316 Sepiabraun
Facebook page: https://www.instagram.com/fedecx5aa/
Location: Uruguay
Contact:

Re: M10 to M42 Getrag 240 mechanical speedo conversion

Post by Sierpien »

nuke laars wrote:Would I be right in thinking that you could just source a bellhousing from the more common getrag 240 (E30 318i) seeing as you can bolt an M42 straight to it?
Yes, but you don´t have mechanical speedo!
My Fake E21 Alpina "C1 Turbo" tribute car!
"Sepiabraun" 1.8 M10 swapped 316


"I thought the block was good for 200, even 300 hp, but I never thought it would take 1000 horsepower."

Alex von Falkenhausen
User avatar
joe14
E21 Fanatic
Posts: 208
Joined: Tue Apr 15, 2014 12:17 pm
My E21(s): 1983 black 316
Location: Manchester

Re: M42 Getrag 240 mechanical speedo conversion

Post by joe14 »

A great write up, I've just done this myself:
http://www.bmwe21.net/forum/viewtopic.p ... 2&start=90

What I would add to this is to expand about the lateral plug:
Sierpien wrote: Also very important the lateral plug, that holds all the mechanism in place, if you don´t take this out yo can´t separate the 2 housings:

Image

Image
The plug in question is this:
Image

We struggled initially because we thought this was just a blanking plug.
There's not much room under neath to get under it so we welded some threaded bar on but we managed with a screwdriver for the second box.
Once this is out and all the other bolts you really don't need a lot of force to get them separated.
Image

[img]http://i1380.photobucket.com/albums/ah1 ... rp.jpg[img]
Post Reply