That is my understanding.Most of the accessories and intake manifold will need be swapped for the 04+ versions, this includes the turbo. The entire fuel system including injectors will need to be the OM647 versions. The engine is interchangeable from my understanding.
If not too much trouble to answer, for future reference.Yes it's possible and has been done before. You use 03 long block with 03 injectors because the pistons are different in 04+. I have done this before let me know if you need more info.
Yes the injector connectors are the same and are triggered by OM647 ECU with no issues.
Complete fuel rail from OM647 is also transferred over.
So safe to assume that it works the other way too?You change the front plate where the low pressure pump mounts with one from OM647.
And vise versa for OM612 to OM647.Also OM647 high pressure pump is used and it does mount up like its suppose to. In simple terms you strip OM612 to block and head leaving injectors in and dress it up with OM647 components wiring,turbo,rail,pump etc. Everything functions like it should with no warning lights and limp modes (I use DRB3 for all diag on T1n). I have driven swaps like these cross country with no issues.
This is a reply to Aqua Puttana
And comments by Dennis Lindenengineering that the lower end is ok.It appears you are asking whether a 647 long block (cylinder head included) can be used.
The complication you have is mounting and driving the mechanical feed pump and the 612 high pump.
The 647 intake cam lacks the drive extension for the 612 feed pump and the 647 upper chain ramp plate lacks the opening and threaded mounting holes for the feed pump.
The 647 cylinder heads' bolt pattern for the high pump will not allow mounting of your 612 high pump.
Doktor A
Rule of thumb
Everything above the block is different including the FI equipment .
Dennis
No
Simply because the HP injection pump aperture in the head is different the older head and some minor chain guide differences. AND the exhaust valves are sized differently
Dennis
This is very interesting. This means the OM612 injectors (and pistons) will be running at a higher fuel pressure than they were designed for.Yes the injector connectors are the same and are triggered by OM647 ECU with no issues.
Complete fuel rail from OM647 is also transferred over. You change the front plate where the low pressure pump mounts with one from OM647. Also OM647 high pressure pump is used and it does mount up like its suppose to.
Designed for, or used with? There must be a range.This is very interesting. This means the OM612 injectors (and pistons) will be running at a higher fuel pressure than they were designed for.
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