Overview of issues common to 7.3 IDI Diesels.
- Cracked heads causing loss of compression and white smoke
- Injection Nozzle wear, leakage and uneven spray pattern
- return line issues - worn out o rings and broken return caps
- Fuel filter housing sealing issues
- Coolant service intervals & cavitation against cylinder walls
- Oil leaks - oil pan, timing cover, crank seals, valve cover gaskets
- Glow plug burn out
- Glow plug wiring issues - connector ends become whored out
- Turbochargers causing bottom end damage
- Ether damaging prechambers and burning out glow plugs
- Piston ring wear and piston skirt scoring
- Main bearing wear uneven due to running engine too hard (too much power, boost etc)
- Weak injection pump causing hard starting and lack of power
- Dual Mass flywheel can wear out