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N47 120d injector upgrade. blow by.

12K views 7 replies 4 participants last post by  Rem  
#1 ·
2 of my injectors have decided to create a lot of blow by, so seeing as it's unlikely it'll just need seals, what injectors fit 120d 177 n47 engine? As an upgrade?
If I've got to fork out for new injectors or injector refurb I may as well just upgrade if I can.

If not what are n47 injectors capable of power wise? Looking for 250bhp, would a refurbished set of n47 injectors be capable of this?

also what's the best tips for cleaning blow by off, I may just try and change the seals but if there's loads of tar substance everywhere it's probably not going to seat properly so how do I go about honing the hole and cleaning it out? and cleaning the injectors?
It only seems like injectors 1 and 2 are doing it but it needs to be sorted if I'm chasing power and plus the smell is horrible.

Thanks in advance.
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Discussion starter · #2 ·
Anyone shed any light on this? and how I can go about solving this? I know I need to try new seal but how can I clean the hole?
Also do 335d injectors fit as they look similar? Thanks
 
Discussion starter · #3 ·
Can anyone help me with this, do these injectors fit? Part number 782346101
I think they are removed from new 535d, if you fit upgraded injectors can you still just program them in and they'll work fine? Or is mapping required? Thanks
 
Discussion starter · #7 ·
Caspian said:
Do you need to upgrade injectors?? A 120d without a DPF can get to 240 on a standard turbo. Turbo and inter cooler likely to be the weakest links

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I have a upgraded intercooler.
Idk that's why I'm asking I just assumed might need more fuel as they have a lot air!

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