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severe duty fan clutch? #5461143 06/23/20 11:14 PM
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dogememe Offline OP
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In my 2001 Suburban with 293k the stock fan clutch must have been worn out because extended idling or stop and go traffic or off roading at slow speeds but high load was causing overheating and AC performance in this conditions sucked.

I installed a new "severe duty" Hayden/Murray 2786 and now my idle cooling issue is resolved. But this thing screams. Did I make a mistake putty in the severe duty one? At high RPM it moves sooooo much air and it's so loud!


2010 Ford Escape 2.5 ~104K Miles: AMSOIL Signature Series 0W-30, Wix Filter.
2001 Chevy Suburban 5.3 ~293K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: severe duty fan clutch? [Re: dogememe] #5461148 06/23/20 11:27 PM
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andyd Offline
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Has the coolant temp risen compared to last yr? How old is the water pump and flow, coolant and air, through the radiator?


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: severe duty fan clutch? [Re: dogememe] #5461149 06/23/20 11:27 PM
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motor_oil_madman Offline
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Does it not dis engage? Youre lucky you didn't blow the ac. That happened on my truck.

Last edited by motor_oil_madman; 06/23/20 11:28 PM.

2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: severe duty fan clutch? [Re: dogememe] #5461151 06/23/20 11:35 PM
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Chris142 Offline
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It has been dead so long that you got used to not hearing it. The severe duty one will be more agressive than a standard one.

You are very lucky that it did not overpressurize the ac and destroy the compressor.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: severe duty fan clutch? [Re: andyd] #5461152 06/23/20 11:43 PM
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dogememe Offline OP
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Originally Posted by andyd
Has the coolant temp risen compared to last yr? How old is the water pump and flow, coolant and air, through the radiator?

Bought the truck used, water pump is about two months old, that started making noise shortly after buying the truck, changed thermostat at the same time, radiator is about three hours old it exploded in the parking lot at work yesterday and so I fixed it today (drove my other vehicle in the meantime), thankfully we stock the radiator. The old one appears to have been patched with jbweld or something in like four places no wonder it went pop. Coolant is fresh... When I changed the water pump I used peak global lifetime universal and today I couldn't afford more of that so I used some zerex g05 I'd bought a long time ago.

Last edited by dogememe; 06/23/20 11:44 PM.

2010 Ford Escape 2.5 ~104K Miles: AMSOIL Signature Series 0W-30, Wix Filter.
2001 Chevy Suburban 5.3 ~293K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: severe duty fan clutch? [Re: dogememe] #5461163 06/24/20 12:11 AM
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motor_oil_madman Offline
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At 293k they probably sold it because it was becoming undependable and a money pit.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: severe duty fan clutch? [Re: dogememe] #5461164 06/24/20 12:15 AM
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clinebarger Offline
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Use a Express/Savana 3500 6.0L Fan Clutch part# 25744727.....It's a direct replacement & seriously outperforms a GMT800 clutch without the roaring!


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: severe duty fan clutch? [Re: dogememe] #5461183 06/24/20 01:18 AM
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motor_oil_madman Offline
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Just be glad it works. lol I replaced my fan on my truck and I already think it's not really working as good as it used to. I have a feeling they didn't use the oem cummins fan and put a cheaper one on.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: severe duty fan clutch? [Re: dogememe] #5461185 06/24/20 01:21 AM
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GMguy84 Offline
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Originally Posted by dogememe
In my 2001 Suburban with 293k the stock fan clutch must have been worn out because extended idling or stop and go traffic or off roading at slow speeds but high load was causing overheating and AC performance in this conditions sucked.

I installed a new "severe duty" Hayden/Murray 2786 and now my idle cooling issue is resolved. But this thing screams. Did I make a mistake putty in the severe duty one? At high RPM it moves sooooo much air and it's so loud!



Hey Dogememe, I also have a 01 burban with 320K miles as my work beater truck thumbsup and the AC at idle was BAD and a funny smell !!

During my "new car" maintenance checklist It turned out to be the nasty cabin filters blocking air flow


Now A/C blow ICE COLD and GREAT AIR FLOW thumbsup


[Linked Image]
[Linked Image]

Dave


01 Silverado 1500HD Shell RGT 5W30/XG3675

01 Suburban 1500 Mobil 1 Truck/SUV 5W30/XG3675

02 Suburban 1500 Delo 400XLE 10W30/Protec166

82 Trans Am (KITT) M1 10W40HM/XG5
Re: severe duty fan clutch? [Re: dogememe] #5461221 06/24/20 05:16 AM
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madRiver Offline
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I’d be happy the old rig still runs.

Re: severe duty fan clutch? [Re: dogememe] #5461223 06/24/20 05:18 AM
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Lubener Offline
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Originally Posted by dogememe
In my 2001 Suburban with 293k the stock fan clutch must have been worn out because extended idling or stop and go traffic or off roading at slow speeds but high load was causing overheating and AC performance in this conditions sucked.

I installed a new "severe duty" Hayden/Murray 2786 and now my idle cooling issue is resolved. But this thing screams. Did I make a mistake putty in the severe duty one? At high RPM it moves sooooo much air and it's so loud!

You correctly diagnosed your problem as an airflow issue and that's what I would have looked at.. The new fan clutch is moving more volumes of air past the radiator thus making more noise. The only alternative is to put a standard duty unit in if you feel your cooling system can still sufficiently cool the engine. An OEM fan clutch, if still available may work better for you.

Last edited by Lubener; 06/24/20 05:29 AM.

The "thinking" man's friend.
Re: severe duty fan clutch? [Re: dogememe] #5461265 06/24/20 07:06 AM
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buck91 Offline
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Put a HD unit in an older Safari van years ago, that one was loud as all get out as well. Actually, this reminds me of how much louder my ambulance is when the temp gets above about 75F. Seems like that 6.0 diesel would keep the fan locked in almost 100% of the time!


2018 F150 Screw 4x4 2.7L Ecoboost
2011 F150 Scab 4x4 5.0L
1996 Mustang GT 5spd/ragtop
Re: severe duty fan clutch? [Re: dogememe] #5461266 06/24/20 07:07 AM
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spasm3 Online Happy
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I put an oe Delco can on my avalanche, and am pleased with it. I had heard that the aftermarket fans engage more than they need to, making noise and using more fuel.


13 elantra 84k 5w30 synpwr
03 chevy avalanche 83k synpwr 5w30
17 mazda cx-5 19000 miles m1 0w30
Re: severe duty fan clutch? [Re: dogememe] #5461268 06/24/20 07:09 AM
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Rob_Roy Offline
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Some of the older trucks spec'd a different fan clutch depending on the rear axle ratio, or if the vehicle has a towing package. If you are not planning to do any towing you likely could have used the standard duty fan clutch.

Since you already have the heavy duty one installed I would just run it and see how it does. It might quiet down a little with some use.


2016 Ford Expedition EL Platinum
2016 Ford Expedition XLT
1999 Ford F350, V10
Re: severe duty fan clutch? [Re: buck91] #5461280 06/24/20 07:27 AM
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bullwinkle Offline
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Originally Posted by buck91
Put a HD unit in an older Safari van years ago, that one was loud as all get out as well. Actually, this reminds me of how much louder my ambulance is when the temp gets above about 75F. Seems like that 6.0 diesel would keep the fan locked in almost 100% of the time!

The 6.0 PSD ones are electrically actuated, my ‘03 E-350 one would scream going uphill pulling a trailer, even when the coolant hadn’t got hot yet. I think they had some kind of load sensing ability. To the OP-make sure there’s nothing between the A/C condenser & radiator-any (center) blockage will cause the fan clutch to get hot fast and stick on. Like a redneck cardboard front cover wedged in between!


06 Ram 3500 CTD 4X4(FG Venturi), 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7 (MC), 03 Merc Grand Marquis 4.6 2V(XG2), 11 Express 3500 6.0 (Fram PH10060 for now)
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