TDDi/TDCi swap and commonality

[liammonty]

Hi All,
I’ve got a 2009 T350 with a 2.4 115 TDCi engine that’s seized. I’ve also got a scrap 2000 Mk 6 T350 with the 2.4 125 TDDi. I was hoping that I’d be able to use the block from this engine with the head and all other ancillaries etc from the TDCi. However, I’ve got a sneaking suspicion that the pistons in the 2 engines may be different, meaning that the TDCi injection and head won’t be compatible with the block and pistons from the TDDi. I guess the other option is to use the TDDi engine whole, injection and all, but I’m trying to avoid all the messing with wiring that that would mean. Can anyone offer me any advice or wisdom on the best way forward and if I can make this work without having to source another engine? Thanks!

[knobby1]

Quite a few engine internals are different between the two, not really compatible. Apart from the things you mention, Mk7 uses a single row timing chain....Mk6 has a double row chain. Fuel pump mounting on block is also different I believe.

If you're fed up with the Mk7 TDCi engine, there have been chaps who have changed out to the TDDi engine...but as you say, a bit of a nightmare electrically wiring wise.

Lord Knobrot

[liammonty]

Thanks! Your help is appreciated!