Rattling

[DA BIG ONE]

I've just changed out my IP and set TDCO to -1.9 the Heath program I run calls for -1.94, the engine rattles and runs slightly hotter around town. I'm wondering if this rattling will damage anything, or?

Truck runs fine across it's rpm band.

[john8662]

Without witnessing getting the timing as close to -1.94 as possible I'd say that the symptoms you're describing are completly normal.

Advancing the timing will make the engine have more rattle (rasp).

The engine will also generate more heat as a result.