Clutch versis fixed fan - The 1947 - Present Chevrolet & GMC Truck Message Board Network

8door · 08-06-2016, 04:07 PM

I'm running a new 290 HP 350 Crate .
The truck is a C10 turbo 400. General use is daily for light home
hauling items nothing heavy, trailer or sand or concrete bags.
mostly a grocery getter and fun to drive.
Now have a clutch fan in it, that is failing, grease coming out around front of
housing. Temperature climbs on hot days more noticable in heavy slow traffic.

Should I just use a stock fixed blade or spring for another clutch fan ?
SoCal do gets hot in the summer...... 95 plus every day.

davepl · 08-06-2016, 04:27 PM

You want the big 7-blade fan, but you don't want to run that fixed, so I'd replace the clutch. Much better than a fixed 4 or 5 blade, I think.

**Stocker** · 08-06-2016, 11:02 PM

Quote:

Originally Posted by davepl

You want the big 7-blade fan, but you don't want to run that fixed, so I'd replace the clutch. Much better than a fixed 4 or 5 blade, I think.

100% agreed! New clutch unit is well worth the price.... 7-blade is the best IMO..... obviously a proper shroud, and the cooling system in good operation condition.

While I'm not aware of any issue with fixed-blade fans going through the hood (now a flex fan is a different matter), they make noise and rob power all the time, and still cannot pull nearly as much air as an engaged clutch fan.

57taskforce · 08-07-2016, 12:25 AM

Quote:

Originally Posted by Stocker

100% agreed! New clutch unit is well worth the price.... 7-blade is the best IMO..... obviously a proper shroud, and the cooling system in good operation condition.

While I'm not aware of any issue with fixed-blade fans going through the hood (now a flex fan is a different matter), they make noise and rob power all the time, and still cannot pull nearly as much air as an engaged clutch fan.

Ha I miss read the op. I was reading fixed fan and thinking flex my bad. A clutched setup is still the best bet.

8door · 08-07-2016, 04:00 PM

OK, I got it.
Just was looking for options.The truck already has a 7 blade with a clutch.
So this is easy , just get a new clutch....some times I'm a dumb ass.

Thanks all.

57taskforce · 08-06-2016, 05:54 PM

Those fixed blade fans can be pretty dangerous too. Ever see one go thru a hood?

08-06-2016, 04:07 PM	#1
8door Not too old to learn Join Date: Mar 2004 Location: SoCal Posts: 617	Clutch versis fixed fan I'm running a new 290 HP 350 Crate . The truck is a C10 turbo 400. General use is daily for light home hauling items nothing heavy, trailer or sand or concrete bags. mostly a grocery getter and fun to drive. Now have a clutch fan in it, that is failing, grease coming out around front of housing. Temperature climbs on hot days more noticable in heavy slow traffic. Should I just use a stock fixed blade or spring for another clutch fan ? SoCal do gets hot in the summer...... 95 plus every day. __________________ 1968 C10 a way to long restoration.

08-06-2016, 04:27 PM	#2
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Clutch versis fixed fan You want the big 7-blade fan, but you don't want to run that fixed, so I'd replace the clutch. Much better than a fixed 4 or 5 blade, I think. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

08-07-2016, 04:00 PM	#5
8door Not too old to learn Join Date: Mar 2004 Location: SoCal Posts: 617	Re: Clutch versis fixed fan OK, I got it. Just was looking for options.The truck already has a 7 blade with a clutch. So this is easy , just get a new clutch....some times I'm a dumb ass. Thanks all. __________________ 1968 C10 a way to long restoration.

08-06-2016, 05:54 PM	#6
57taskforce All about them K’s Join Date: Jun 2014 Location: Land of Entrapment Posts: 6,444	Re: Clutch versis fixed fan Those fixed blade fans can be pretty dangerous too. Ever see one go thru a hood? __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s



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