4.2 2001 Overheating
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Freshman User
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4.2 2001 Overheating
The Alabama summer is taking its toll on my Fords.
Wifes Explorer spung a coolant leak and my F150 is overheating at idle.
Temp is normal in stop and go traffic untill I turn on the AC then the needle slowly starts creeping into the danger zone. If I turn off the AC and start moving it goes back to normal. I read another post suggesting checking for play in the fan. When I grab a blade and try to wiggle there is no noticable play. Coolant is green and full. 110k miles.
Any other suggestions sure would be appreciated.
Wifes Explorer spung a coolant leak and my F150 is overheating at idle.
Temp is normal in stop and go traffic untill I turn on the AC then the needle slowly starts creeping into the danger zone. If I turn off the AC and start moving it goes back to normal. I read another post suggesting checking for play in the fan. When I grab a blade and try to wiggle there is no noticable play. Coolant is green and full. 110k miles.
Any other suggestions sure would be appreciated.
Senior User
Joined: Mar 2007
Posts: 403
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From: Medina TN
I'd go with the fan clutch too. Just because it dosen't have any play, doesn't mean it is working "properly". Do you hear it engage after sitting at a moderately long stoplight? I live in West TN and our temps have been in the 3 digit area all week, mine seems to stay engaged while in traffic. If you can't hear it (sounds like a jet engine under the hood), it ain't working in my opinion.
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Cargo Master
Joined: Aug 2002
Posts: 2,013
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From: Cajun Country
It could be the fan clutch.......but,it could also be a partially clogged radiator.I would start with the fan clutch. 
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Thanks everybody,
Spent the weekend putting a radiator in the wife's Explorer, so I didn't get around to doing anything to my truck.
My first thought was the clutch fan too, trust me I've replaced a few in my Fords over the years. The only thing about mine is seems real tight when I crank up it starts right up and when I kill the ignition it stops immediately. Is there any other way to test it? I would hate to throw parts at it if you know what I mean.
I appreciate all the suggestions.
Spent the weekend putting a radiator in the wife's Explorer, so I didn't get around to doing anything to my truck.
My first thought was the clutch fan too, trust me I've replaced a few in my Fords over the years. The only thing about mine is seems real tight when I crank up it starts right up and when I kill the ignition it stops immediately. Is there any other way to test it? I would hate to throw parts at it if you know what I mean.
I appreciate all the suggestions.
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