D1 Fan clutches

logan_gibson

Well-known member
Dec 20, 2016
254
46
Alabama
our next challenger is the hayden 2634.
I'm at ~65k with that Hayden 2634, waterpump is around 90k.
No issues so far. I installed it when I did the waterpump, but Ill swap in an HD Unit occasionally during the summer if we are going to be off-road when its 100°+
 

WaltNYC

Well-known member
Mar 3, 2010
622
82
NYC
I'm at ~65k with that Hayden 2634, waterpump is around 90k.
No issues so far. I installed it when I did the waterpump, but Ill swap in an HD Unit occasionally during the summer if we are going to be off-road when its 100°+
I do the same when temperature is near triple digits (July/August in the NYC metro area). It certainly keeps it cooler but it SCREAMS like a banshee basically all the time. As soon as the weather cools the 'standard duty' unit goes back in.
 
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robertf

Well-known member
Jan 22, 2006
4,510
197
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this may have been a junk waterpump all along. Less than 2 year old ac delco with the cheap stamped impeller. Barely any water flow at idle. I put a flowkooler on it along with the hayden and it is behaving as expected so far
 

1of40

Well-known member
Oct 23, 2017
105
18
Va
I'm somewhat seriously considering an electric fan swap. Anyone have improved performance with their electric fan swap? I did on a 200tdi in a 110 and never regretted it.
 

p m

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Staff member
Apr 19, 2004
15,039
452
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La Jolla, CA
www.3rj.org
I'm somewhat seriously considering an electric fan swap. Anyone have improved performance with their electric fan swap? I did on a 200tdi in a 110 and never regretted it.
If you do, please post the results.
I'd love to get a set of electric fans - at least, I wouldn't worry about water crossings.
 

robertf

Well-known member
Jan 22, 2006
4,510
197
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The hayden and flowkooler are working great on one of them. the other one is so gunked up with crap in the block and heatercore that flushing it is about an every other day task

Going to try a real filter on it and see how that goes
 

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rover rob

Well-known member
Mar 29, 2016
228
39
upstate NY
The hayden and flowkooler are working great on one of them. the other one is so gunked up with crap in the block and heatercore that flushing it is about an every other day task

Going to try a real filter on it and see how that goes
i just checked out the flowcooler and the price isnt bad if it works as well as you say.
 

robertf

Well-known member
Jan 22, 2006
4,510
197
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it certainly flows more at idle than the delco waterpumps Ive been running based on what I saw with that sight glass filter


finished up the filter install. somehow the heater core was again clogged enough that the waterhose slowly trickled through it at first before dumping out mud water.
 

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jymmiejamz

Well-known member
Dec 5, 2004
5,884
278
34
Los Angeles, Ca
All can clutches for the RV8 are junk in my opinion. I install electric fans whenever I replace a radiator now. I don’t even bother with aftermarket or Genuine radiators anymore because they are all junk too. I’ve been getting complete setups from Ron Davis Radiators

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