Clutch Fan Install getting mucho frustrated - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Oregon 1967 GMC** · 11-09-2024, 10:18 AM

Could someone break it down the assembly order for this? I'm thinking I need studs because I cannot get the bolts in from the fan side o from the water pump.

**Steeveedee** · 11-09-2024, 10:27 AM

Save yourself mucho frustration and get the studs. It's 10 times easier.

**Stocker** · 11-09-2024, 01:23 PM

Quote:

Originally Posted by Steeveedee

Save yourself mucho frustration and get the studs. It's 10 times easier.

This. The last time I changed my fan clutch, I didn't know about the studs. Fiddly but I eventually got it. Told myself if I ever do it again, I'll get the studs.

**leddzepp** · 11-09-2024, 01:49 PM

I use studs on every vehicle I own, makes life way easier.

**Oregon 1967 GMC** · 11-09-2024, 02:37 PM

Copy that. Thank you I'm getting studs.

chewychevy67 · 11-09-2024, 03:01 PM

I used studs on my 67 327 as well. Much easier to line up the clutch under the shroud

54blackhornet · 11-09-2024, 03:17 PM

Napa has a kit with everything you need.

**Dashman** · 11-09-2024, 07:01 PM

You're not putting that spacer back, right? I believe those are only for flex fans replacing thermo clutch fans.

**Stocker** · 11-09-2024, 08:44 PM

Quote:

Originally Posted by Dashman

You're not putting that spacer back, right? I believe those are only for flex fans replacing thermo clutch fans.

Good point, that spacer should not be needed. The real test is whether the fan blades are roughly half-in, half-out of the shroud opening.

**Oregon 1967 GMC** · 11-10-2024, 03:12 AM

Quote:

Originally Posted by Dashman

You're not putting that spacer back, right? I believe those are only for flex fans replacing thermo clutch fans.

I do need that spacer to reach half in half out position in shroud. Hope i can find studs that long. I'll look at NAPa because O O'Reilly only had two inches

**Oregon 1967 GMC** · 11-10-2024, 08:51 AM

I ordered this from Summit. Hope it works

**Oregon 1967 GMC** · 11-17-2024, 12:20 PM

Quote:

Originally Posted by Oregon 1967 GMC

I ordered this from Summit. Hope it works

It didn't work. Going to augment shroud

**Stocker** · 11-17-2024, 01:35 PM

I couldn't tell by the pic, and don't have the particulars off the top of my head.... But is there a chance you have a short water pump, and a long water pump might put everything right?

EDIT: This might help:

**Steeveedee** · 11-17-2024, 02:45 PM

^ Interesting pic. My '70 BBC has a short water pump.

**Stocker** · 11-17-2024, 04:14 PM

Well, the OP's '67 should have a short original WP -- but over the years, things can change.

**Steeveedee** · 11-17-2024, 04:59 PM

What's worse is that my fan clutch is about 1/2" from the radiator. That's the severe duty clutch, though, which has fins that stick out pretty far past the fan mounting flange. I ended up just making a shroud from a piece of aluminum strap.

We haven't seen the OP's shroud. Maybe the deeper 4WD shroud would work?

**Palf70Step** · 11-17-2024, 08:24 PM

Quote:

Originally Posted by Steeveedee

Save yourself mucho frustration and get the studs. It's 10 times easier.

I agree. I've tried both ways and studs are definitely the way to go.

Stanco · 11-18-2024, 01:59 AM

If you do a search for 5/16 studs 1.25 inches long you will find several with the fine thread end longer than the course thread end. This is not ideal for a fan clutch instillation.

AMK has the correct hard to find studs available but has a minimum order of $30.

Along with the studs I also bought some correct water pump, alternator, and power steering pump bolts to replace some ugly hardware store bolts.

https://www.amkproducts.com/bulk-fas...oduct_ID=11003

**Oregon 1967 GMC** · 11-18-2024, 07:57 AM

Quote:

Originally Posted by Stocker

I couldn't tell by the pic, and don't have the particulars off the top of my head.... But is there a chance you have a short water pump, and a long water pump might put everything right?

EDIT: This might help:

I have a long water pump.

72c20customcamper · 11-18-2024, 10:35 AM

Quote:

Originally Posted by Oregon 1967 GMC

I have a long water pump.

Quote:

Originally Posted by Oregon 1967 GMC

I do need that spacer to reach half in half out position in shroud. Hope i can find studs that long. I'll look at NAPa because O O'Reilly only had two inches

Something is strange then . The long water pump would push the fan further into the shroud . I have this problem on my 72 it had a later model engine with a long water pump with the associated accessories brackets. The fan is not half in and out it’s completely inside the shroud . I’ll post a pick later have to go out to the truck

Edit for pictures:
It’s not optimal but the truck has never overheated even pulling the trailer .

**1970cstblazer** · 11-18-2024, 11:06 AM

https://www.ebay.com/itm/27644031344...Bk9SR9La9fznZA

**Stocker** · 11-18-2024, 02:27 PM

Quote:

Originally Posted by Steeveedee

We haven't seen the OP's shroud. Maybe the deeper 4WD shroud would work?

Agreed, pics would definitely help, and a deeper 4x4 shroud might be the answer.

FWIW, the OEM shroud on my K20 is right at 9" deep front-to-back.

**Oregon 1967 GMC** · 11-18-2024, 02:58 PM

It may be because my 400 sbc is back against the firewall. My plug wires literally rub against the firewall. Not sure maybe because I used the same motor mounts that my straight six 250 had.

un4gvn! · 11-18-2024, 03:04 PM

Carburetor studs work also and they come in different lengths. Some come useing hex key to install.

**Classic Bowties** · 11-18-2024, 03:20 PM

Quote:

Originally Posted by Oregon 1967 GMC

It may be because my 400 sbc is back against the firewall. My plug wires literally rub against the firewall. Not sure maybe because I used the same motor mounts that my straight six 250 had.

^ ^ ^ After ten days, 800 views and 25 post in... With that above added info, you have answered/solved the root of the mucho clutch fan issues that you are having on your own. Mel

11-09-2024, 10:18 AM	#1
Oregon 1967 GMC Senior Member Join Date: Jan 2014 Location: Portland, Oregon Posts: 448	Clutch Fan Install getting mucho frustrated Could someone break it down the assembly order for this? I'm thinking I need studs because I cannot get the bolts in from the fan side o from the water pump. Attached Images __________________ Hey man 67 GMC Short Stepside 400 small block, turbo 350. Build thread:http://67-72chevytrucks.com/vboard/s...d.php?t=650603

11-09-2024, 10:27 AM	#2
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,673	Re: Clutch Fan Install getting mucho frustrated Save yourself mucho frustration and get the studs. It's 10 times easier. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

11-09-2024, 01:49 PM	#4
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,031	Re: Clutch Fan Install getting mucho frustrated I use studs on every vehicle I own, makes life way easier. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul

11-09-2024, 02:37 PM	#5
Oregon 1967 GMC Senior Member Join Date: Jan 2014 Location: Portland, Oregon Posts: 448	Re: Clutch Fan Install getting mucho frustrated Copy that. Thank you I'm getting studs. __________________ Hey man 67 GMC Short Stepside 400 small block, turbo 350. Build thread:http://67-72chevytrucks.com/vboard/s...d.php?t=650603

11-09-2024, 03:01 PM	#6
chewychevy67 Registered User Join Date: Jan 2010 Location: Here Posts: 5,550	Re: Clutch Fan Install getting mucho frustrated I used studs on my 67 327 as well. Much easier to line up the clutch under the shroud

11-09-2024, 03:17 PM	#7
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,391	Re: Clutch Fan Install getting mucho frustrated Napa has a kit with everything you need. __________________ 71 C-20 07 Magnum RT AWD

11-09-2024, 07:01 PM	#8
Dashman Active Member Join Date: Apr 2021 Location: Santa Cruz, NM Posts: 114	Re: Clutch Fan Install getting mucho frustrated You're not putting that spacer back, right? I believe those are only for flex fans replacing thermo clutch fans.

11-10-2024, 08:51 AM	#11
Oregon 1967 GMC Senior Member Join Date: Jan 2014 Location: Portland, Oregon Posts: 448	Re: Clutch Fan Install getting mucho frustrated I ordered this from Summit. Hope it works Attached Images __________________ Hey man 67 GMC Short Stepside 400 small block, turbo 350. Build thread:http://67-72chevytrucks.com/vboard/s...d.php?t=650603

11-17-2024, 01:35 PM	#13
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,722	Re: Clutch Fan Install getting mucho frustrated I couldn't tell by the pic, and don't have the particulars off the top of my head.... But is there a chance you have a short water pump, and a long water pump might put everything right? EDIT: This might help: __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

11-17-2024, 02:45 PM	#14
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,673	Re: Clutch Fan Install getting mucho frustrated ^ Interesting pic. My '70 BBC has a short water pump. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

11-17-2024, 04:14 PM	#15
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,722	Re: Clutch Fan Install getting mucho frustrated Well, the OP's '67 should have a short original WP -- but over the years, things can change. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

11-17-2024, 04:59 PM	#16
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,673	Re: Clutch Fan Install getting mucho frustrated What's worse is that my fan clutch is about 1/2" from the radiator. That's the severe duty clutch, though, which has fins that stick out pretty far past the fan mounting flange. I ended up just making a shroud from a piece of aluminum strap. We haven't seen the OP's shroud. Maybe the deeper 4WD shroud would work? __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

11-18-2024, 01:59 AM	#18
Stanco Registered User Join Date: Dec 2023 Location: Rural California Posts: 30	Re: Clutch Fan Install getting mucho frustrated If you do a search for 5/16 studs 1.25 inches long you will find several with the fine thread end longer than the course thread end. This is not ideal for a fan clutch instillation. AMK has the correct hard to find studs available but has a minimum order of $30. Along with the studs I also bought some correct water pump, alternator, and power steering pump bolts to replace some ugly hardware store bolts. https://www.amkproducts.com/bulk-fas...oduct_ID=11003

11-18-2024, 11:06 AM	#21
1970cstblazer All stock and staying that way Join Date: Jul 2003 Location: Elkland, PA Posts: 1,822	Re: Clutch Fan Install getting mucho frustrated https://www.ebay.com/itm/27644031344...Bk9SR9La9fznZA __________________ 1970 K/5 Blazer CST 4WD, Medium Bronze, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration finally getting close to completion.. 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 45k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 62k miles, 3.6, 8L45, 3.23 LS, 18" wheels

11-18-2024, 02:58 PM	#23
Oregon 1967 GMC Senior Member Join Date: Jan 2014 Location: Portland, Oregon Posts: 448	Re: Clutch Fan Install getting mucho frustrated It may be because my 400 sbc is back against the firewall. My plug wires literally rub against the firewall. Not sure maybe because I used the same motor mounts that my straight six 250 had. __________________ Hey man 67 GMC Short Stepside 400 small block, turbo 350. Build thread:http://67-72chevytrucks.com/vboard/s...d.php?t=650603



Register or Log In To remove these advertisements.

11-18-2024, 03:04 PM	#24
un4gvn! Registered User Join Date: Mar 2006 Location: Latrobe, Pa. 15650 Posts: 351	Re: Clutch Fan Install getting mucho frustrated Carburetor studs work also and they come in different lengths. Some come useing hex key to install.

Register or Log In To remove these advertisements.