injector's tip

[Konstantine Bogach]

Hi.
My injectors are off my 200tqa '89.   Tips are dirty.  I am thinking 
maybe I shoud  clean the tips as they have tiny holes (jets?) in them 
and I dont know if they are clogged up.  Are this tips removable?  I 
remember, when I changed injectors coulple years ago,  the old ones came 
out without tips as tips stuck in the inserts?   It seems to me that in 
my another 200tq '89 I had remove recently replaced injectors and one 
also came out without tip and I just put it back when re-installed 
injector.   But I don't remember for sure.  Besides cleaning,  it would 
be much easier to put on new viton o-rings.  After putting on 3 rings I 
feel like my fingers need a week of rehabilitation.

Thanks in advance.
Kontantin.