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

davepl · 04-27-2016, 12:58 PM

When I had my truck apart I noticed that on the clutch fan, the little coil thermal spring on its nose was unhooked, so I re-wrapped it and hooked it back under the little tang.

I have no idea if I wrapped it one too many, one too few, or just the right number of times.

The fan is NOT very stiff when hot - like you can easily spin a half turn out of it, so its not very locked up.

Without one to compare to, is there any way to know if my fan is right? I've been having some heating issues at idle, and it's not roaring or pulling a lot of air.

Worst case, what's a good source for a RELIABLE clutch fan clutch? I'd buy new GM if I could get it on that kind of part.

**Stocker** · 04-27-2016, 03:19 PM

Quote:

Originally Posted by davepl

Worst case, what's a good source for a RELIABLE clutch fan clutch? I'd buy new GM if I could get it on that kind of part.

If you have a decent junkyard nearby, look for any [relatively] late-model full-sized GM product. Doesn't need to be a truck; a Caddy or other large car will also work, as long as it has an engine-driven fan. If you get a clutch fan from one of those, you should be set.

This may be of interest.... or not.

http://www.aa1car.com/library/cooling_fan_clutch.htm

RustyBucket · 04-27-2016, 06:49 PM

Buy a new one from most any of the auto parts stores, looks like the most expensive one for your truck from Oreilly is $85 or so. I bought the mid priced one ($40) for my Blazer. Have a 160 thermostat, 6 blade fan and the stock shroud from the 350 on a mild 454. Can't make it run hot down here in the summer.

04-27-2016, 12:58 PM	#1
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Clutch fan questions When I had my truck apart I noticed that on the clutch fan, the little coil thermal spring on its nose was unhooked, so I re-wrapped it and hooked it back under the little tang. I have no idea if I wrapped it one too many, one too few, or just the right number of times. The fan is NOT very stiff when hot - like you can easily spin a half turn out of it, so its not very locked up. Without one to compare to, is there any way to know if my fan is right? I've been having some heating issues at idle, and it's not roaring or pulling a lot of air. Worst case, what's a good source for a RELIABLE clutch fan clutch? I'd buy new GM if I could get it on that kind of part. __________________ 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

04-27-2016, 06:49 PM	#3
RustyBucket Registered User Join Date: Jul 2009 Location: Space Coast, Fl. Posts: 1,050	Re: Clutch fan questions Buy a new one from most any of the auto parts stores, looks like the most expensive one for your truck from Oreilly is $85 or so. I bought the mid priced one ($40) for my Blazer. Have a 160 thermostat, 6 blade fan and the stock shroud from the 350 on a mild 454. Can't make it run hot down here in the summer. __________________ Dad always said, "Son, WISH IN ONE HAND, and ......." -------------------------------------- -------------------------------------- Current toy trucks: '71 GMC 1500 SUPER CUSTOM short/step, orig. dk. blue, 350/700r, ps,pb, A/C '72 Blazer 2wd, ochre & white, 454, tremecTKO 500 5spd. ps, pb, A/C, tilt Last 10yrs of hobby vehicles, had a FEW more in the 50yrs. before these: '66 Plymouth Belvedere City of Miami cop car clone. '70 Nova 406"sb, 13.5-1, solid roller, Brodix, p.glide/t.brake, back halved, 9" Ford, spool 4.88, cage,ladder bar/coilover, 10.5 tire....... SOLD!! '67 C10 short/step side mount spare -- SOLD!! '72 Jimmy 2wd, 350/350, ps, pb, fun driver, lots of bondo & a shiny red paint job..... SOLD!! '69 Nova 350, 4spd, A/C, ps, p.b, ...SOLD!!



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