I've been seeing increased coolant temps when idling my RB engine. What I've noticed is, if I start it up after some cool-down time there is a good amount of airflow moving through the radiator; I can really feel the wind with my hand and if I drop a paper towel into the canyon between the grill and radiator it immediately sucks it against the radiator, even if I drop it against the backside of the grill. After driving, I can idle it in gear in the driveway with the E-brake on and watch the temps slowly climb. Drop a paper towel in, and it will only hold to the radiator if I drop it right against it. I can feel much weaker airflow at the front of the radiator than when it was cold.
Thing is, I shut it down and the fan turns with what I'd consider a good normal amount of resistance; if I try to spin it, it moves less than a quarter turn on it's own....but the weak air movement when hot maybe tells a different story? Can the fan clutch be bad even if it passes the 'spin test'? It's a factory 7-blade fan on a Hayden 2947. Thanks!
Thing is, I shut it down and the fan turns with what I'd consider a good normal amount of resistance; if I try to spin it, it moves less than a quarter turn on it's own....but the weak air movement when hot maybe tells a different story? Can the fan clutch be bad even if it passes the 'spin test'? It's a factory 7-blade fan on a Hayden 2947. Thanks!
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