RRC fan fit Defender shroud? - Page 2 - Defender Source
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  #21  
Old October 18th, 2010, 04:51 PM
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Daniel Marcello
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Phil get back to us on how the OEM RRC fan clutch works. I found my Hayden worked great off road because of the low speeds, but once on the highway it was fully engaged and spun too fast and too loud. It made the engine work too hard to let air do its job.

If the original RRC fan spins less at highway speeds I think this would be a better solution. Because I love the RRC fan and think it does a way better job at pulling air than the 90s 7 blade one.
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  #22  
Old October 19th, 2010, 07:12 AM
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Well my OEM clutch was the wore out one from my RRC which I replaced with one from NAPA that is not as overdriven as the Hayden unit. It feels like a different truck with that Hayden clutch gone.
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  #23  
Old October 19th, 2010, 09:18 AM
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Quote:
Originally Posted by rover4x4 View Post
Well my OEM clutch was the wore out one from my RRC which I replaced with one from NAPA that is not as overdriven as the Hayden unit. It feels like a different truck with that Hayden clutch gone.
Do you remember the part number from NAPA? I want to pick one up and try it out this weekend.
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  #24  
Old October 19th, 2010, 10:21 AM
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Charles Galpin
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I'm interested too if they fit a serpentine belt setup (lefty loosy)
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  #25  
Old October 19th, 2010, 11:49 AM
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Originally Posted by cgalpin View Post
I'm interested too if they fit a serpentine belt setup (lefty loosy)

I don't think they do but I may be wrong. the 94/95 water pump had a smaller thread than the 97s. also like you mentioned threaded on the other way. But I thought you 97 guys had some options for different fan clutches. Isn't there a GM clutch that fits the 97?
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  #26  
Old October 19th, 2010, 12:02 PM
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Well, mine is a '94 with a 3.9 from a disco1 that had a serpentine belt setup - but should be equivalent to a '97 setup afaik.

But I did buy an aftermarket clutch - don't have the model number offhand. It cooled well but was loud all the time.

So I bought a "rover" clutch, but I don't think it's "genuine" and it's still way too loud - like it never disengages. Well sometimes it does, but seems random at best. Anyway it's loud enough to be annoying. So next move is either try a SGenuine$ or something else.
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  #27  
Old October 19th, 2010, 01:22 PM
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Check on Summit Racings website they had a couple of Hayden units for the serp truck. Idk what the NAPA part number was, they just looked it up in their computer, it was not a Hayden branded clutch.

------ Follow up post added October 19th, 2010 02:42 PM ------

http://www.napaonline.com/Search/Det...50065+2065008#

that seems to be the one I got from NAPA I didnt save the box or anything...
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  #28  
Old October 25th, 2010, 04:25 PM
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I swapped my old Range Rover clutch in and wheeled this weekend, temps in the 70's I got down on the truck once and got to about 190 other wise no issue. Ditch that stock fan and run a RRC fan. I will likely go back to the overdriven hayden clutch in the summer when temps get into the 90's. Part of this project also makes me wonder about the condition of my radiator
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  #29  
Old July 24th, 2011, 09:28 AM
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still keeping cool with a shot radiator, highly recommended.
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  #30  
Old August 15th, 2011, 03:13 PM
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I dug this thread up a few weeks ago doing a search on the topic, so I thought I'd reply and share my experience too.

My 90 with couldn't handle the combination of ~100-degree temps + air conditioning + crawling traffic, so I bought an 11-blade fan and an RRC fan clutch after some research here. It took some trial and error to ensure that the fan didn't hit the cowl - plus, the cowl seems to flex quite a bit once warm, as I could leave the garage with everything fine, only to return after a test run with the fan rubbing. In the end, the solution was to shave ~1mm off of the blades, shave a small amount off of the cowl, and insert an aluminum bar with holes drilled through between the radiator and cowl (and remove the springs under those cowl screws so they'd fit). I suspect that, like the rest of the Defender's construction, the precise tolerances will vary wildly from vehicle to vehicle.

The verdict: this thing really moves some air! It's louder (more of an airflow noise, IMO), but once the engine starts revving, I can't hear it over the exhaust anyway. Despite the fact that now we're having cooler weather, I can tell that the engine temp is a bit lower than usual. We'll have to see how this setup does once things heat back up, which should be soon.

Anyway, the RRC fan fits (with the above caveats) and I'd definitely trade a little noise for better cooling capacity.

Travis
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  #31  
Old August 15th, 2011, 04:56 PM
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Nice write up Travis. The cowl needs to move up higher for sure. I put those spring washer in under the cowl to lift it with nothing hitting.

The other good thing is you can get quality aftermarket clutches for a lot cheaper and I think there is a variance in light duty to heavy duty.
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  #32  
Old August 15th, 2011, 06:04 PM
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Its a no brainer IMO. I wonder if the 4.0 uses the disco fan.
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  #33  
Old June 17th, 2014, 09:53 AM
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So the Range Rover Classic fan is ideal, but which is the ideal fan clutch? The only one on the NAPA (part number TEM 281691) site is "heavy duty".
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  #34  
Old June 17th, 2014, 10:16 AM
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I swap between a new napa clutch and a worn out clutch. I dont recall the part number, Id try rockauto as well
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  #35  
Old June 17th, 2014, 10:16 AM
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I used a genuine RRC clutch - works great (and with that one, it's a lot easier remove the fan for access).

Travis
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  #36  
Old June 17th, 2014, 10:43 AM
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I think Dan - ini88 - has been experimenting with the Hayden #2772 fan clutch for $60 for the past few years.
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  #37  
Old June 17th, 2014, 11:40 AM
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Using my D1 Vicous and fan. Fan Shroud arriving any day now. IT needs it!
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  #38  
Old June 17th, 2014, 12:28 PM
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Quote:
Originally Posted by rijosho View Post
I think Dan - ini88 - has been experimenting with the Hayden #2772 fan clutch for $60 for the past few years.
I thought that one was locked up almost all the time so he didn't like it.

Quote:
Originally Posted by Rocky View Post
Using my D1 Vicous and fan. Fan Shroud arriving any day now. IT needs it!
A d1 fan clutch won't work on a 14CUX Defender.
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  #39  
Old June 17th, 2014, 12:34 PM
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Quote:
Originally Posted by Jymmiejamz View Post
I thought that one was locked up almost all the time so he didn't like it.



A d1 fan clutch won't work on a 14CUX Defender.
Any 'heavy duty fan sucks ... it basically runs all the time ... even when not needed, are noisy and destroys your gas mileage. We've all thrown these in the trash.

Now using a RRC fan clutch and 11 blade fan does seem to be a decent upgrade ... the fan fits the shroud much better and generates better air flow.

That being said ... if your fan is kicking in you probably have other issues as i've discovered when the cooling system is working well ... you don't need much activity from the fan.
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  #40  
Old June 17th, 2014, 12:59 PM
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I thought Dan had said that the "heavy duty" meant it'd last longer than the ones he had used previously, and not "heavy duty" as in they'd run almost constantly.
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