Nozzle Cleaning
- Disassemble injector nozzle. If nozzle needle is damaged, fused, seized or discolored, replace entire nozzle assembly. Check all other parts for excessive wear or damage. Replace as needed.
- Scrape off carbon deposits with a piece of wood and clean each part in cleaning solvent. After cleaning, keep parts immersed in light oil. Be sure to remove all deposits from adjusting shims, spring, push rod, spacer, nozzle body, needle and seat, and injection hole.
- Pull needle about halfway out of body and release. Needle should slide smoothly back into place. Repeat this procedure several times, rotating needle slightly each time. If needle does not slide smoothly, replace nozzle body and needle.
- Clean nozzle holder mounting area of cylinder head. Fit a new nozzle gasket to the nozzle before mounting in head. See Fig 1 .
- Install injector nozzle to cylinder head and tighten to specified torque using Nozzle Holder Socket Wrench (MD998387).