Well ive noticed a ticking at idle or when driving with the window down.
When i was looking under the hood it sounded like it was coming from the #4 injector area. The injector was wet so i suspect the ticking is from the injector leaking?

Im scared that it might be my head developed a crack, but there is no oil consumption nor has the car been overheating. Stays at 80 all the time. coolent resivior is still full of coolent. And ive been running it on the new Ultra low sulfur diesel recently no veggie oil or biodiesel this past month.

what do you guys think?

__________________
Current:
05 E320 CDI
07 GL320 CDI
08 Sprinter
05 Dodge Cummins
01 Dodge Cummins

Previous
2004 E55 AMG
2002 C32 AMG (#2)
1995 E300
1978 300D
1987 300D
2002 C32 AMG(blown motor :[
1981 300SD
1983 300SD
1987 300SDL
2002 Jetta TDI
1996 S420
1995 S500
1993 190E 2.6
1992 190E 2.3
1985 190E 2.3 5-Speed