I have a 8950 with a ticking noise coming from the engine. It is more noticeable when I have the engine at an idle. It is also random, not in sync with the engine and it also doesn't speed up at the same rate as the engine speed, it just gets harder to hear since the engine is getting louder. The rhythm reminds me of the PTO clanking sound that come from these tractors. Does that sound transfer up to the front? Was also thinking it could be a the fuel cooler purging..... It is hard to tell where it is exactly coming from. It is easiest to hear it in the front grill and maybe the left side of the motor. Any insight would be great.