Injector Questions (seals and index compatibility)

[Alanrorr1]

I am using refurbished injectors.

1) Wondering, is there an easy way to compress the o-ring seals? I have ruined one injector since I was not patient enough and forced the compression. For example, is there a lubricant I can use on the seals, perhaps a recommended brand of seal or a recommended tool?
2) For injector compatibility, can I put index 12 injectors in one bank (i.e., 3 cylinders) and use the last 3 injectors, index 6 to 8, in the other bank?

I need to get better at the searches on this forum, but did not see the answers when I initially looked.

Thanks!
Z4 2011 35is (love it!)

[B21]

https://www.amazon.com/dp/B0BJVR48T7...NrPXRydWU&th=1


You can have seperate index numbers on each bank as long as they are all the same within the bank..

Obviously got to code the fuel flow per injector too!

[Alanrorr1]

Perfect! Thanks for the excellent information. I look forward to trying the new tool and putting some index 12 injectors in one of the banks. A great cost savings!