Cold-combustion will cause this. Also, check injection timing at a reputable diesel workshop.
I pace my bet here .. injection timing !
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Cold-combustion will cause this. Also, check injection timing at a reputable diesel workshop.
According to my manual, the correct injection pump governor diaphragm oil is: ND Part # 995500-0140 or Bosch Part # OL-36V1.
The recommendation is 2 to 4 drops every 24000 km or 18 months
normal driving conditions and the same for severe conditions. Can show a pic of the filler screw if needed.