Swap m278 head on to m273
Senior Member
Joined: Aug 2019
Posts: 340
Likes: 189
From: Europe
09 SL500, 03 E320 CDI Wagon
No, they are 2 total different engines.
The 273 is a 90 degree V, with minifold injection, where as the 278 is a 60 degree V and direct cyl. injection.
The sensor array on those heads are very different as well, and the ECU from the 273 would not know how to handle the signals.
The 273 is a 90 degree V, with minifold injection, where as the 278 is a 60 degree V and direct cyl. injection.
The sensor array on those heads are very different as well, and the ECU from the 273 would not know how to handle the signals.
