[D22M2]

A friend is mine recently blew up his 2015 F80 M3 and needed an engine swap, it got me wondering …

Given the N55B30T0 is unique to the OG M2, what would you say about the future serviceability or new engine availability ?

[PHX102]

Originally Posted by D22M2

A friend is mine recently blew up his 2015 F80 M3 and needed an engine swap, it got me wondering …

Given the N55B30T0 is unique to the OG M2, what you would say about the future serviceability or new engine availability ?

I believe an automotive Co have to keep parts available for 20 years after production ends but I maybe wrong. Most of the parts are just regular N55 parts as well so I expect few if any problems for a while, but things change.

[D22M2]

Originally Posted by PHX102

I believe an automotive Co have to keep parts available for 20 years after production ends but I maybe wrong. Most of the parts are just regular N55 parts as well so I expect few if any problems for a while, but things change.

I’m good with 20 years parts availability


Lots of parts unique to the OG N55 but I’m more concerned about the unique internals then the stuff mount it on , OG M2 N55 gets beefed up cast iron cylinder liners, forged crankshaft/ connecting rods and some sort of unique piston rings .

[DanG]

Originally Posted by D22M2

I’m good with 20 years parts availability


Lots of parts unique to the OG N55 but I’m more concerned about the unique internals then the stuff mount it on , OG M2 N55 gets beefed up cast iron cylinder liners, forged crankshaft/ connecting rods and some sort of unique piston rings .

The parts are from the S55. So you should be ok.

[D22M2]

Originally Posted by DanG

The parts are from the S55. So you should be ok.

Cool cool.

I suspect new crate M2 N55 could be slim pickings .

[F87source]

I wouldn't be worried about the piston or rods or bearings, piston rings etc because aftermarket companies will always keep making them for this platform until ICE's become completely obsolete. The only thing that would worry me is the block and maybe crank shaft.

[D22M2]

Originally Posted by F87source

I wouldn't be worried about the piston or rods or bearings, piston rings etc because aftermarket companies will always keep making them for this platform until ICE's become completely obsolete. The only thing that would worry me is the block and maybe crank shaft.

Agree. Thinking if failure causes cast iron sleeve damage the block is trash.

[F87source]

Originally Posted by D22M2

Agree. Thinking if failure causes cast iron sleeve damage the block is trash.

Generally any scoring that is deep enough on the cylinder liner and cannot be bored and honed out renders the block trash, and it doesn't have to be deep at all.


However there are possibilities of sleeving it and that could save the motor.

[chris719]

Originally Posted by D22M2

Cool cool.

I suspect new crate M2 N55 could be slim pickings .

Probably, but N55 will be a super common junkyard engine. You'll never run out of parts from mechanically totaled BMWs to pull from. S55 parts will probably be easy enough to source too.

[agent_orange]

Doesn't the F26 X4 M40i have the same version of N55 as the OG M2?

[Moflow]

Worst case scenario, we know the S55 fits….

[agent_orange]

Originally Posted by Moflow

Worst case scenario, we know the S55 fits….

And the B58, and therefore S58...
In 5-10 years time, if you blow an N55 in your M2, you won't be replacing it with an N55.

[F87source]

Originally Posted by agent_orange

And the B58, and therefore S58...
In 5-10 years time, if you blow an N55 in your M2, you won't be replacing it with an N55.

It will be an absolute nightmare to retrofit any other engine, ecu, and the coding required for it all to play nicely.


Most of the time if you blow the engine it is repairable by honing the cylinders, and replacing pistons and rods depending on what goes wrong.


None of this should happen if you have a good tune and look at data logs regularily. Don't want to log? Then do not tune.

[Leaveatrail86]

Originally Posted by F87source

It will be an absolute nightmare to retrofit any other engine, ecu, and the coding required for it all to play nicely.


Most of the time if you blow the engine it is repairable by honing the cylinders, and replacing pistons and rods depending on what goes wrong.


None of this should happen if you have a good tune and look at data logs regularily. Don't want to log? Then do not tune.

Pretty sure someone already swapped a b58 into an og m2.

[F87source]

Originally Posted by Leaveatrail86

Pretty sure someone already swapped a b58 into an og m2.

It's not impossible but the question was if it was easy? Likely not, especially if you want it to be 100% integrated with fully functioning electronics, idrive etc. The coding involved would be an absolute nightmare - let alone the wiring.