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#1 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
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Recommended Clutch Fan?
My OEM fan clutch is showing signs of wear and I plan to replace it before long. It's weeping a bit of fluid near the shaft and the fan has a tiny bit of wobble. Online shopping has turned up several that will fit, but I'm not sure if some are better than others. Any that you like, or any that you would avoid? Right now I'm leaning towards an ACDelco 15-80245 which *may* be an identical replacement. Thanks.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#2 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Recommended Clutch Fan?
I bought this one - not the cheapest but I too wanted ACDelco. Amazon lists it as a direct fit, but it's not cosmetically identical to the old ones. Close though.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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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 |
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#3 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
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Re: Recommended Clutch Fan?
Yup, they show that as correct for your big-block GMC, and 15-80245 for my SBC.
So you are happy with the way yours works? Engages and disengages when it should? Curious because I have read about some units being too aggressive (for lack of a better word), locking up too early and staying locked for too long, creating power loss and extra noise.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#4 |
2WD Jimmy
![]() Join Date: Mar 2005
Location: Davis County, Utah
Posts: 2,564
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Re: Recommended Clutch Fan?
I have a Real AC Delco brand new in the box that you can have for $75 plus shipping. I paid way over $100 bucks when I bought it.
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#5 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
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Re: Recommended Clutch Fan?
The one I have been looking at claims to be AC Delco. If you don't mind my asking, is there a difference between yours and that one? What's the p/n on yours? Thanks.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#6 |
2WD Jimmy
![]() Join Date: Mar 2005
Location: Davis County, Utah
Posts: 2,564
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Re: Recommended Clutch Fan?
Hows this? if you cant read it, the number is 22050676 This a Real GM clutch fan, not a chinese knockoff... Dayton Ohio, USA made.
Last edited by Tom Vogel; 08-11-2016 at 11:41 AM. |
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#7 | |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Recommended Clutch Fan?
Quote:
Seems to tighten up an appropriate amount for the heat load.
__________________
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 |
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#8 |
Registered User
Join Date: May 2016
Location: Pa
Posts: 1,278
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Re: Recommended Clutch Fan?
I just got mine from GM. Part #19189681
1969 396 Says made in USA on the clutch....
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IT IS WHAT IT IS |
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#9 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
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Re: Recommended Clutch Fan?
Thanks for the feedback, guys, I appreciate it. And thanks for the offer, Tom. That unit may do the trick but it does look different than mine, and the p/n is different. I'm going to do more digging before I commit.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#10 |
2WD Jimmy
![]() Join Date: Mar 2005
Location: Davis County, Utah
Posts: 2,564
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Re: Recommended Clutch Fan?
Mine is for a smallblock.
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#11 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
|
Re: Recommended Clutch Fan?
Update, and I'll keep it brief. There are three types of thermal fan clutches -- standard duty, heavy duty, and severe duty. Good explanations / illustrations here: http://www.haydenauto.com/featured%2...s/content.aspx
My K20 uses a heavy duty unit but I could not find one. Virtually all are standard duty, and a very few are severe duty. Went to my local NAPA and another customer overheard us and suggested looking up the part for a slightly newer K30. Bingo! NAPA p/n 271303, fan clutch #2747. Made by Four Seasons in Lewisville, Texas. Tom, I have to pass on yours. It is a standard duty and not recommended for my K20.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#12 |
Senior Member
![]() Join Date: Sep 2014
Location: Lake Tapps, Wa.
Posts: 625
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Re: Recommended Clutch Fan?
Tom,
Is the Delco clutch fan you have, a thermal or non-thermal? I made a similar post about replacing mine and wonder if the part you have is a direct replacement. Forum members answered suggesting that I get a thermal style for replacement. Thanks Sam |
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#13 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
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Re: Recommended Clutch Fan?
Guys, if I may, Tom's Delco above is a standard duty thermal. The above link clearly shows how to make the determination.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#14 |
Senior Member
![]() Join Date: Sep 2014
Location: Lake Tapps, Wa.
Posts: 625
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Re: Recommended Clutch Fan?
Thanks for clarifying Mike.....I went to that site to read the differences but it obviously didn't sink into my thick skull
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#15 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
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Re: Recommended Clutch Fan?
Just to follow-up. I installed the new fan clutch yesterday. With the old one off, I could see it had seeped out a lot more fluid than I had thought. The shaft and the rear of the unit were heavily coated with built-up gunk. On a side note, I had also been unsuccessfully chasing what sounded like an occasional fan belt squeal. It would only happen around 1200-1300 rpm.
Took her out for a test run this morning. Temp gauge stayed at the lower end of normal, which is right where it usually reads. Went up the mountain and it climbed to a bit below halfway, typical for the situation. And I cannot create the 'squealing fan belt' noise. I suspect it was coming from the old fan clutch since it had lost a significant amount of fluid. Everything seems to be working just like it's supposed to. ![]()
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#16 |
But Found Her 25yrs Later!
![]() Join Date: Oct 2010
Location: Oregon City, Oregon
Posts: 10,525
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Re: Recommended Clutch Fan?
Saved for reference.
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I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 |
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#17 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Recommended Clutch Fan?
I ordered this Delco one for my 402, but when it arrived it had the Severe Duty style and shape, not like pictured.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
__________________
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 |
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#18 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
|
Re: Recommended Clutch Fan?
Severe Duty *might* be overkill (stay engaged too much, extra roar, use a bit more fuel) or it might be just what that big engine wants. Are you planning to keep it, or return it and get a Heavy Duty unit?
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#19 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Recommended Clutch Fan?
It doesn't seem to run too much or make any additional noise, so I kept it and am running it!
__________________
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 |
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#20 | |
Registered User
Join Date: Mar 2019
Location: Livonia, MI
Posts: 56
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Re: Recommended Clutch Fan?
Quote:
I'm having trouble finding the actual fan blades themselves to run with this clutch! Any recommendations? |
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#21 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,623
|
Re: Recommended Clutch Fan?
Quote:
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#22 |
Registered User
Join Date: Feb 2011
Location: Parkville, MD
Posts: 1,024
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Re: Recommended Clutch Fan?
Junkyard would be your best bet if you got any nearby with square bodies. Otherwise, I know Summit Racing has them. I bought one for my truck a couple years back.
__________________
1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z |
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#23 |
Registered User
Join Date: Jul 2009
Location: Space Coast, Fl.
Posts: 1,050
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Re: Recommended Clutch Fan?
I bought one from Advance a few years ago .. a Dorman product. Local store got it from their warehouse same day. You can probably get their part number from the website and avoid the dread "kid at the counter" interaction.
__________________
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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#24 | |
Registered User
Join Date: Mar 2019
Location: Livonia, MI
Posts: 56
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Re: Recommended Clutch Fan?
Quote:
Thank you for the info! |
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#25 | |
Registered User
Join Date: Mar 2019
Location: Livonia, MI
Posts: 56
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Re: Recommended Clutch Fan?
Quote:
![]() Okay, I'll check with them - i did see some Dorman repops out there so I'll investigate as to which part number will work for me. Thank you, guys! |
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