Thanks for the tips guys, I hope it is a lifter which I will look at today. One other thing before I pull wrenchs. The glow plug panel light is not on during preheat but the glow plugs get power. After startup the panel light stays on and no power goes the glow plugs? Could this be connected to my valve noise? Also if I need to pull the cam to replace a lifter I will take it to the DEALER!!!!!!!!! Help...

300 sd
350 sdl with noise
Unimog DoKa

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uptank