Injection timing can have a significant affect on the running temp. If the timing is too advanced then the engine can run hot. It can also melt pistons and pre-chambers in that situation.



Because the *actual* timing interval of the injection is a combination of the timing of the pump building pressure and *also* the breaking pressure of the injectors, if you change the breaking pressure of the injector it has a direct affect on the actual timing of the injection interval. If pop pressure is lowered timing is advanced and if it is raised it is retarded as the pump will take longer to build the higher pressure.

Did you check the breaking pressures of the injectors after the nozzles were installed? If not then I would do so for sure, especially because of the running hot situation.

Andrew