BMW 318i to M3 conversion

[Tk729]

Can an 1995 M3 engine fit into a 1992 318is chasis? I have a 318i and an M3 engine havent tried to fit it, I want to know before I go trough the trouble of taking the engine out...

[ILoveMPower]

yes it fits, do it.

[kelly_s]

fits but you might want to swap the whole drivetrain because the 318's rear end and tranny is weak

[delatlanta1281]

isn't he going from obd1 to obd2 as well? May need to swap ecu and wiring harness.....

[schussey]

check out 318ti.org for more info on the swap

-chris

[uberpanzer]

Originally Posted by delatlanta1281

isn't he going from obd1 to obd2 as well? May need to swap ecu and wiring harness.....

4 banger ECU won't work with the 6 cylinder motor, so the ECU and harness HAVE to be swapped.

But '95 is pre-OBDII, so it is a little easier (says someone NOT working on the car).

[Aradaiel]

95 is last year of obdI. If I remember correctly the 318 has different mounts or an oilpan or something different. 325 is straight swap.

[the afro guy]

there's a lot more to do than just drop the motor in. the suspention won't be up to the extra weight of the 6cyl over the 4cyl, the brakes are hopeless, the diff will pop, the gear box wil probably die, the ecu and all engine wiring needs to be changed......

maybe try and find an m3 with a dead engine and just swap the engine?

[MrTom]

I've got a friend who did it, but he bought a wrecked M3 and swapped all the suspension and interior over at the same time.

So yes, it fits. But you'll probably need alot more than just the engine.