If the injectors are not frozen in place is a easy task, injectors copper seats seals
cost few dollars, a good diesel mechanic
can loose freeze injectors in a fuzz, then test cylinder by cylinder and mount back injectors with new copper seat seals
and done, a bad compression
piston cylinder cacht in time can save you a expensive bill in the long run.. destructive my ass, so my perkins
injectors 3 years agoo and its still running like a champ... those brokers lol.....