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Fan Clutch
#737356 June 17th 2018 11:46 am
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Have any of you had your original fan clutch out of your Dodge and identified the branding? Up until removing our fan clutch, everything we have taken off was clearly marked Mopar.

This clutch I just removed has Eaton etched into it (not stamped as I have seen on other Eatons online). The fan blades themselves are marked Mopar. Anything I find on Eaton (although I haven't been able to find my exact one) appears to be from the 60's for Chevy's.

I'm trying to determine of this part was original as all of my others have been.

Thanks.


Nicole
1988 Dodge B250 5.9l 360 Ram CamperVan / 727 Tranny / Rochester Quadrajet Carb
www.nikothenomad.blogspot.com
Re: Fan Clutch
nikothenomad #737357 June 17th 2018 1:48 pm
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Original fan clutches were Chrysler parts. They had the pentastar and a part number stamped on them. It might be an aftermarket replacement.


Windows- they're what make a van worth owning!
Re: Fan Clutch
nikothenomad #737358 June 17th 2018 4:54 pm
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Reed that is what I am thinking. Funny they replaced it with one from the 60's - 70's.

Question: when you say "stamped" do you mean "printed" or etched into the surface?

Well, we freed up the spring from its years of grime that had it fully locked (and protected from rust I might add) and will see if we get any different performance.

We are baffled at how these are supposed to work. The more we read the more confused we get about this simple concept.


Nicole
1988 Dodge B250 5.9l 360 Ram CamperVan / 727 Tranny / Rochester Quadrajet Carb
www.nikothenomad.blogspot.com
Re: Fan Clutch
nikothenomad #737359 June 17th 2018 4:55 pm
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Reed that is what I am thinking. Funny they replaced it with one from the 60's - 70's.

Question: when you say "stamped" do you mean "printed" or etched into the surface?

Well, we freed up the spring from its years of grime that had it fully locked (and protected from rust I might add) and will see if we get any different performance.

We are baffled at how these are supposed to work. The more we read the more confused we get about this simple concept.


Nicole
1988 Dodge B250 5.9l 360 Ram CamperVan / 727 Tranny / Rochester Quadrajet Carb
www.nikothenomad.blogspot.com
Re: Fan Clutch
nikothenomad #737361 June 17th 2018 5:22 pm
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I'm thinking now that it is indeed the original. I've found a few now that show the Mopar 'stamped' / painted on and the Eaton etched into them like ours is. I guess the paint on ours has just worn away.

https://bluestarperformance.com/catalog/product/gallery/id/2056/image/7290/


Nicole
1988 Dodge B250 5.9l 360 Ram CamperVan / 727 Tranny / Rochester Quadrajet Carb
www.nikothenomad.blogspot.com
Re: Fan Clutch
nikothenomad #737362 June 17th 2018 5:22 pm
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I'm thinking now that it is indeed the original. I've found a few now that show the Mopar 'stamped' / painted on and the Eaton etched into them like ours is. I guess the paint on ours has just worn away.

https://bluestarperformance.com/catalog/product/gallery/id/2056/image/7290/


Nicole
1988 Dodge B250 5.9l 360 Ram CamperVan / 727 Tranny / Rochester Quadrajet Carb
www.nikothenomad.blogspot.com
Re: Fan Clutch
nikothenomad #737363 June 17th 2018 6:13 pm
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Clutch fans operate in one of two ways. There are thermostatically controlled clutches and centrifugally cnotrolled clutches. Each operates as its name implies. Thermostatic clutches disengage when the ambient temp around the clutch is cooler but engage when the ambient temp increases. Centrifugally controlled clutches engage at low RPM but disengage at higher RPM. The idea to to not drive the fan either when the engine is cold or when the RPM is high and the airflow across the radiator is enough to cool the motor.

Mopar has used both types depending on the application.Rockauto lists both thermal and non-thermal clutches for your application. Personally, I would run a thermally controlled clutch. That way it ill engage even if you are sitting parked with a high idle (for whatever reason).


Windows- they're what make a van worth owning!
Re: Fan Clutch
nikothenomad #737364 June 18th 2018 12:02 am
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Thanks reed. Yes the one we took off to clean was thermal had a spring that turns a little valve. After I cleaned it all up we tested it several times with a hair drier. The spring does contract and turn the valve. Seems to start doing so early at 120 degrees and doesn't compete it's full range. Either way we put it back in tonight and since we don't have a photo tech we'll do other tests we've read about.


Nicole
1988 Dodge B250 5.9l 360 Ram CamperVan / 727 Tranny / Rochester Quadrajet Carb
www.nikothenomad.blogspot.com
Re: Fan Clutch
nikothenomad #737365 June 18th 2018 12:49 am
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Hmmm. The clutch fluid can leak out over time. I wonder if that is making the clutch engage prematurely and remain engaged too long? Weren't you having problems with the engine running too cool?


Windows- they're what make a van worth owning!
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