Putting a m42 in a m10 e30?

[FireFight]

How simple would this swap be? Like same subframe?

Thanks

[SkiFree]

Well,

You'd be losing .2L but adding a cam. Honestly, I don't think the ends justify the means.

[benz-tech]

I recommend driving an M42 car before investing the time and money. The M42 makes a great economical daily, but if your looking for power...

[varg]

http://www.e30zone.net/e30zonewiki/index.php/Engine_Swap_-_M42

M10 is strong and a good candidate for boost if more power is what you're after.

[Jaxx_]

You'd be losing .2L but adding a cam.

:? the m42 is bigger by 30cc

[SkiFree]

Please elaborate how the 1.8L M42 has more displacement than a 2.0L M10?

[Quadrajet]

M10b18 1766cc, M42b18 1796cc

[SkiFree]

I'm used to answering this question for 2002's ..... M10b20 1990cc. I need to get some sleep, don't mind me till morning.

[Quadrajet]

I just learned something Ski! I assumed all the m10's were 1.8s...

[bmwman91]

There is a huge difference in speed and feel between an M10 E30 and M42 E30. I wouldn't go spending big bucks to make the swap though.

At a minimum, you would need:
- M42 engine
- M42 wiring harness
- M42 ECU
- M42 Fuel pump and probably some of the related hoses for the system
- m42Engine mounts
- Getrag 240 transmission
- Tranny brace and mounts (if different than what is on the M10 car)
- M42 driveshaft
- Small case 4.10 diff (not sure if the M10 cars had one already)
- M42 radiator and coolant hoses
- M42 throttle cable assembly
- M42 exhaust (cat-back and muffler)
- M42 O2 sensor

There is probably other stuff needed but it is slipping my mind.

[TobyB]

The E30 got the 1.8l M10, of course...

Having driven both, I LOVE the M42. If your M10 is dead,
or needs expensive work, I'd do it in a heartbeat.

If you HATE your M10, go M30- that'll solve your torque problem

But if you like the M10 and just want a little more, the M42's a fun engine.

Or M52, for even more M42 goodness, but with some torque, too...

But any way you do it, it's pretty involved.
t

[raudonis]

At a minimum, you would need:
- M42 Fuel pump and probably some of the related hoses for the system
- Getrag 240 transmission
- Small case 4.10 diff (not sure if the M10 cars had one already)
- M42 exhaust (cat-back and muffler).

All injected e30 run the same capacity fuel pumps, no need to change unless your m10 is carbureted.
m42 swap into m10 or m40 car is quite popular in Europe, but 99% use engine and all the rest (gearbox included) from e36, even better you can fit a 1,9L m44 from newer e36. Reason - original m42 e30 is a unicorn, 99% have been DOHC swapped like 10 years ago. Majority m42 e30 specific parts like intake manifolds, exhaust headers nowhere to be found.
The diff does not have to be changed, I think no explanation required here :D
Exhaust can be hacked up by a guy with a MIG for a few beers using parts from donor car and your current car, since they are both 4 cylinder 1 pipe exhausts.

[glnr13]

m10 e30's came with 3.64 open small diff

[TobyB]

original m42 e30 is a unicorn, 99% have been DOHC swapped

M42 IS a DOHC.

And in the US, unicorns must be all over the place, 'cause everyone
is calling everything 'unicorn' these days...

t

[raudonis]

I meant 24v swaped ;)