Fan shroud mounting - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Fred T · 01-30-2005, 09:35 PM

It appears that some sort of spacer is needed on the fan shroud screws. I don't know for sure, since my truck was butchered in some areas by the P.O. This is on my 69, 350 w/ a/c.

When I took it apart there wer 4 different size screws with nuts for spacers.

*Randy70C-10* · 01-30-2005, 10:35 PM

If there were nuts on it for spacers, it sounds like the wrong radiator support brackets are bolted on the radiator support. There shouldn't be any spacers.

gonebad2 · 01-30-2005, 10:50 PM

The bottom of the shroud is attached to the radiator support with clips. I'll post a pic of them if you want.

Fred T · 01-30-2005, 11:02 PM

Quote:

Originally Posted by gonebad2

The bottom of the shroud is attached to the radiator support with clips. I'll post a pic of them if you want.

Please do. Thanks.

gonebad2 · 01-30-2005, 11:15 PM

The originals were a little bigger. GM discontinued them and replaced them with these.

Fred T · 01-30-2005, 11:41 PM

I took some pictures, hopefully one of y'all can figure out what's not right. There's about a 3/8" gap between the shroud and the upper support. It's a 4 core radiator.

gonebad2 · 01-31-2005, 12:02 AM

I think you may need the longer retainers for a four core radiator. Those look like the shorter retainers ( for a three core ). They should sit flat on the radiator. Maybe the pic is just deceiving. Sorry I was'nt able to help.

4x4Poet · 01-31-2005, 12:13 AM

That was my first thought, as well, gonebad2. I would follow gb2's advice and count the rad's cores. If you have a 4-core rad, then a previous owner must have installed the rad without also upgrading to 4-core supports. I'm concerned with what the rad's tank bottoms look like in their 3-core rubber cushions and metal rad supports.

gonebad2 · 01-31-2005, 12:24 AM

If you use the 3 core mounts with a 4 core radiator, you run the risk of vibration on metal to metal contact wearing a hole in your radiator.

Fred T · 01-31-2005, 09:36 PM

I found some problems by doing some measuring, old against new. The new radiator is 1/4" wider and taller. The new radiator cushions are 1/8" thicker than the old. Add that up, and there is an additional 1/2" of height. The ribs on the tank were against the core support at the top, took care of that by notching the flange on the core support. I haven't arrived at a solution to the height issue, yet. Need to do some clearance checks with the hood.

Also, the bottom edge of the fan shroud doesn't match up with the core support. Now, while I mutter some words about aftermarket parts.

mr402 · 01-31-2005, 11:21 PM

I'm no small block expert but that looks nothing like the shroud on my big block trucks. It does look a lot closer to a shroud for a later year truck. I can post pics tomorrow if needed.

Robert1970C20rstbukt · 02-01-2005, 12:05 AM

The shroud clips on my truck look different, they're bigger and stick out more than the ones gonbad2 posted a pic of. Anyway here's a pic of a 4 core rad. hold down with the correct hex head screw for holding the top of the rad. shroud to it, not sure if it's gonna help you or not. Sorry about the pics, the webcam is all I have to work with right now. FYI these are about 6.5" long, you might wanna measure the ones on your truck and see if they're shorter or not.

Fred T · 02-01-2005, 12:17 PM

Thanks, Robert. Mine are 6.5" long.

junkyardjohn · 02-01-2005, 01:31 PM

FRED -- I WASN'T GOING TO REPLY TO YOUR THREAD, BECAUSE I WAS SURE SOMEONE WOULD COME UP WITH A SOLUTION. IT'S PRETTY SIMPLE. GO TO YOUR LOCAL BONE YARD & GET A FAN SHROUD OFF OF A 70s OR 80s CHEVY VAN. IT WILL BOLT RIGHT UP & LOOKS RIGHT. YOU CAN ALSO GET THE UPPER & LOWER MOUNTS FOR A 4 CORE RADIATOR & CLIPS TO HOLD IN THE BOTTOM OF THE SHROUD FROM A VAN TOO. (THEY ARE THE SAME AS TRUCKS) WHEN INSTALLING NEW RUBBER CUSHINS, THEY TEND TO BE A LITTLE TALLER AT FIRST, BUT AFTER A WHILE THE RUBBER MASHES DOWN. I LIKE TO JUST REPLACE THE BOTTOM ONES FIRST, & PUT IT TOGETHER WITH THE OLD TOP ONES. THEN AFTER THEY'VE BEEN IN THERE FOR ABOUT A MONTH, I PUT THE NEW TOP ONES IN. IF YOU HAVE TROUBLE FINDING THE CLIPS, P.M. ME & I'LL SEND YOU SOME. YA NEED TO GO TO THE BONEYARD, IT'S THEROPUDIC (SP?)

JOHN

Fred T · 02-01-2005, 02:13 PM

Thanks a bunch, John. Now I have to wait and hope the weekend weather is good. I was getting ready to start machining some fittings, but a trip to the boneyard is easier.

Robert1970C20rstbukt · 02-01-2005, 10:41 PM

No problem sir, glad I could help.

01-30-2005, 09:35 PM	#1
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Fan shroud mounting It appears that some sort of spacer is needed on the fan shroud screws. I don't know for sure, since my truck was butchered in some areas by the P.O. This is on my 69, 350 w/ a/c. When I took it apart there wer 4 different size screws with nuts for spacers. __________________ Fred There is no such thing as too much cam...just not enough engine.

01-30-2005, 10:50 PM	#3
gonebad2 Merciless Butcher Join Date: Oct 2003 Location: CC Nevada Posts: 1,447	The bottom of the shroud is attached to the radiator support with clips. I'll post a pic of them if you want. __________________ Your Bought And Sold....I Got Your Soul!

01-30-2005, 11:15 PM	#5
gonebad2 Merciless Butcher Join Date: Oct 2003 Location: CC Nevada Posts: 1,447	clips The originals were a little bigger. GM discontinued them and replaced them with these. Attached Images __________________ Your Bought And Sold....I Got Your Soul!

01-30-2005, 11:41 PM	#6
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	I took some pictures, hopefully one of y'all can figure out what's not right. There's about a 3/8" gap between the shroud and the upper support. It's a 4 core radiator. Attached Images __________________ Fred There is no such thing as too much cam...just not enough engine.

01-31-2005, 12:02 AM	#7
gonebad2 Merciless Butcher Join Date: Oct 2003 Location: CC Nevada Posts: 1,447	I think you may need the longer retainers for a four core radiator. Those look like the shorter retainers ( for a three core ). They should sit flat on the radiator. Maybe the pic is just deceiving. Sorry I was'nt able to help. __________________ Your Bought And Sold....I Got Your Soul!

01-30-2005, 10:35 PM	#2
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	If there were nuts on it for spacers, it sounds like the wrong radiator support brackets are bolted on the radiator support. There shouldn't be any spacers.

01-31-2005, 12:13 AM	#8
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	That was my first thought, as well, gonebad2. I would follow gb2's advice and count the rad's cores. If you have a 4-core rad, then a previous owner must have installed the rad without also upgrading to 4-core supports. I'm concerned with what the rad's tank bottoms look like in their 3-core rubber cushions and metal rad supports. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.

01-31-2005, 12:24 AM	#9
gonebad2 Merciless Butcher Join Date: Oct 2003 Location: CC Nevada Posts: 1,447	If you use the 3 core mounts with a 4 core radiator, you run the risk of vibration on metal to metal contact wearing a hole in your radiator. __________________ Your Bought And Sold....I Got Your Soul!

01-31-2005, 09:36 PM	#10
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	I found some problems by doing some measuring, old against new. The new radiator is 1/4" wider and taller. The new radiator cushions are 1/8" thicker than the old. Add that up, and there is an additional 1/2" of height. The ribs on the tank were against the core support at the top, took care of that by notching the flange on the core support. I haven't arrived at a solution to the height issue, yet. Need to do some clearance checks with the hood. Also, the bottom edge of the fan shroud doesn't match up with the core support. Now, while I mutter some words about aftermarket parts. __________________ Fred There is no such thing as too much cam...just not enough engine.

01-31-2005, 11:21 PM	#11
mr402 Registered User Join Date: Jan 2004 Location: Elmira, Oregon Posts: 449	I'm no small block expert but that looks nothing like the shroud on my big block trucks. It does look a lot closer to a shroud for a later year truck. I can post pics tomorrow if needed.

02-01-2005, 12:05 AM	#12
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	The shroud clips on my truck look different, they're bigger and stick out more than the ones gonbad2 posted a pic of. Anyway here's a pic of a 4 core rad. hold down with the correct hex head screw for holding the top of the rad. shroud to it, not sure if it's gonna help you or not. Sorry about the pics, the webcam is all I have to work with right now. FYI these are about 6.5" long, you might wanna measure the ones on your truck and see if they're shorter or not. Attached Images __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck

02-01-2005, 12:17 PM	#13
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Thanks, Robert. Mine are 6.5" long. __________________ Fred There is no such thing as too much cam...just not enough engine.

02-01-2005, 01:31 PM	#14
junkyardjohn Registered User Join Date: Aug 2001 Location: SOMERSET KY. Posts: 6,425	FRED -- I WASN'T GOING TO REPLY TO YOUR THREAD, BECAUSE I WAS SURE SOMEONE WOULD COME UP WITH A SOLUTION. IT'S PRETTY SIMPLE. GO TO YOUR LOCAL BONE YARD & GET A FAN SHROUD OFF OF A 70s OR 80s CHEVY VAN. IT WILL BOLT RIGHT UP & LOOKS RIGHT. YOU CAN ALSO GET THE UPPER & LOWER MOUNTS FOR A 4 CORE RADIATOR & CLIPS TO HOLD IN THE BOTTOM OF THE SHROUD FROM A VAN TOO. (THEY ARE THE SAME AS TRUCKS) WHEN INSTALLING NEW RUBBER CUSHINS, THEY TEND TO BE A LITTLE TALLER AT FIRST, BUT AFTER A WHILE THE RUBBER MASHES DOWN. I LIKE TO JUST REPLACE THE BOTTOM ONES FIRST, & PUT IT TOGETHER WITH THE OLD TOP ONES. THEN AFTER THEY'VE BEEN IN THERE FOR ABOUT A MONTH, I PUT THE NEW TOP ONES IN. IF YOU HAVE TROUBLE FINDING THE CLIPS, P.M. ME & I'LL SEND YOU SOME. YA NEED TO GO TO THE BONEYARD, IT'S THEROPUDIC (SP?) JOHN __________________ junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES// LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST

02-01-2005, 02:13 PM	#15
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Thanks a bunch, John. Now I have to wait and hope the weekend weather is good. I was getting ready to start machining some fittings, but a trip to the boneyard is easier. __________________ Fred There is no such thing as too much cam...just not enough engine.

02-01-2005, 10:41 PM	#16
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	No problem sir, glad I could help. __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck



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