External head gasket leak?

AK135i

Corporal
Dec 13, 2016
117
Anchorage, Alaska

Not exactly having good luck here, finally figured out my coolant leak. How often does this happen to n54's? I know blowing head gaskets arent too common but an external leak at the head has me surprised. The car was compression checked and cyl 1 was 18% down and the rest were fine, but no misfires and the car still runs great (at 127k). No oil in the coolant, and I changed the oil last week and no coolant in the oil either. Just curious if it's happened to anyone else. I have an entire spare low milage motor ready to go in so I'm not really sweating this. It consumes about a gallon of coolant every 600 miles currently, and consumes zero oil over a 3000 mile oil change intervals.
 
Last edited:

AK135i

Corporal
Dec 13, 2016
117
Anchorage, Alaska
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