Hydraulic fan engaging often on 6.5 GEP


New member
Johnstown new york
I have a M998 with a 6.5 GEP motor. Is it normal for the hydronic fan clutch engage fairly often. Example. 80 degree day. Fan will engage 5 times for 30 seconds or so in a 10 mile drive. (Normal or not?). I replaced hoses. Flushed out twice. Replaced cap and thermostat. No debris and fins straightened. I do have a armored grill in hood.
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