I have a 92 1.6 na installed with leaky injectors and was wondering if injectors from a mk1 1.6 na mechanical head would work with my mk2 motor?
Yep, they'd be fine. Though just getting the injectors you have serviced would probably yield the best results... Or order a set from Performance Diesel and then send back your cores. Injectors most definitely do wear.
prob time for a new set of injectors; a good place can be a little pricey, or shop around and sometimes you have to bite it; ive got more than one empty injector body from rockauto and like, then again i have 3 sets or so of injectors, most have to be tested by now, some i got incomplete. the extra price for like vanbc suggestion is well worth it.