The Ford Barn

D_Lazaris · 08-24-2012, 02:26 PM

I did a search but couldn't come up with an answer.

I've recently installed a 4 blade fan on my 30' Model A after seeing a major crack on my original 2 blade.

Installed, the fan hits the radiator.. I am at a loss, Is there a way to bring the radiator forward? Or bring the fan back?

juke joint johnny · 08-24-2012, 02:47 PM

If this is a new 4 blade fan having a cast iron hub and pressed steel blades held together by 4 bolts I wouldn't fit that either!!!
I have had one of those fly apart and take out the radiator and the water pump
Best bet to use a cast ally or plastic blade one
John Cochran

D_Lazaris · 08-24-2012, 02:58 PM

It's a NOS original 4 blade, not a recast. This one is riveted together

ctlikon0712 · 08-24-2012, 04:22 PM

Go back to a 2 blade! lol Serioulsy though, I love my new aluminum 2 blade. For around $40 you can't beat it. And it looks like it belongs to boot!
Good Luck whatever you decide, D Lazaris.

TinCup · 08-24-2012, 05:13 PM

Hits at the bottom? Hits at the waterpump shaft?

D_Lazaris · 08-24-2012, 06:38 PM

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The fan blade hits the bottom of the radiator but not at the top. It clears the water pump housing fine

Fred K-OR · 08-24-2012, 07:17 PM

Are the blades bent forward?

Phil Noonon · 08-24-2012, 07:33 PM

I had that happen and it turned out that the keyway hole had broken and was allowing the fan blade to wobble which allowed the fan to "hit" against a part of the radiator as the blade rotated.

wildwilly · 08-24-2012, 08:52 PM

I had to try a few fans to find one with the right pitch an size to clear everything

Charlie Stephens · 08-24-2012, 09:51 PM

Does your hand crank line up properly if you try to crank the car?

Charlie Stephens

pat in Santa Cruz · 08-25-2012, 12:15 AM

I worked on a 39 Ford with that problem. Turns out the fan was for a truck, and the blades were longer than one for a car, so they hit the lower radiator core.

ever try to replace a water pump equipped with a 4 blade?? the radiator has to come out. With a 2 blade, it does not. The advantages of a 2 blade out number the 4 blade in performance, fit, appearance, and cost.

1931 flamingo · 08-25-2012, 07:52 AM

Try loosening the radiator mounting bolts and move the rad forward at the bottom?? Are the blade lengths the same on the 4 blade as the two blade?? Fan "seated" on the w/pump shaft??
Paul in CT

08-24-2012, 02:26 PM	#1
D_Lazaris Junior Member Join Date: Jan 2012 Location: Murrieta, Ca Posts: 25	4 Blade fan hits radiator. I did a search but couldn't come up with an answer. I've recently installed a 4 blade fan on my 30' Model A after seeing a major crack on my original 2 blade. Installed, the fan hits the radiator.. I am at a loss, Is there a way to bring the radiator forward? Or bring the fan back? __________________ U.F.R.A ~ United Flathead Racing Association PM For Info!

08-24-2012, 02:47 PM	#2
juke joint johnny Senior Member Join Date: Feb 2012 Location: London England Posts: 908	Re: 4 Blade fan hits radiator. If this is a new 4 blade fan having a cast iron hub and pressed steel blades held together by 4 bolts I wouldn't fit that either!!! I have had one of those fly apart and take out the radiator and the water pump Best bet to use a cast ally or plastic blade one John Cochran

08-24-2012, 02:58 PM	#3
D_Lazaris Junior Member Join Date: Jan 2012 Location: Murrieta, Ca Posts: 25	Re: 4 Blade fan hits radiator. It's a NOS original 4 blade, not a recast. This one is riveted together __________________ U.F.R.A ~ United Flathead Racing Association PM For Info!

08-24-2012, 04:22 PM	#4
ctlikon0712 Senior Member Join Date: Feb 2011 Location: Cocoa, Florida Posts: 1,609	Re: 4 Blade fan hits radiator. Go back to a 2 blade! lol Serioulsy though, I love my new aluminum 2 blade. For around $40 you can't beat it. And it looks like it belongs to boot! Good Luck whatever you decide, D Lazaris. __________________ Wanted: Simmons Super Power Head Craig Likon 1931 150B

08-24-2012, 05:13 PM	#5
TinCup Senior Member Join Date: May 2010 Location: OKC / Tonkawa, Ok. Posts: 1,977	Re: 4 Blade fan hits radiator. Hits at the bottom? Hits at the waterpump shaft? __________________ Oklahoma City Model A Restorers Group.

08-24-2012, 06:38 PM	#6
D_Lazaris Junior Member Join Date: Jan 2012 Location: Murrieta, Ca Posts: 25	Re: 4 Blade fan hits radiator. Sponsored Links (Register now to hide all advertisements) The fan blade hits the bottom of the radiator but not at the top. It clears the water pump housing fine __________________ U.F.R.A ~ United Flathead Racing Association PM For Info!

08-24-2012, 07:17 PM	#7
Fred K-OR Senior Member Join Date: May 2010 Location: Stayton, Oregon Posts: 3,806	Re: 4 Blade fan hits radiator. Are the blades bent forward? __________________ Fred Kroon 1929 Std Coupe 1929 Huckster

08-24-2012, 07:33 PM	#8
Phil Noonon Member Join Date: Aug 2012 Posts: 69	Re: 4 Blade fan hits radiator. I had that happen and it turned out that the keyway hole had broken and was allowing the fan blade to wobble which allowed the fan to "hit" against a part of the radiator as the blade rotated.

08-24-2012, 08:52 PM	#9
wildwilly Senior Member Join Date: Oct 2011 Location: Easley, SC Posts: 109	Re: 4 Blade fan hits radiator. I had to try a few fans to find one with the right pitch an size to clear everything

08-24-2012, 09:51 PM	#10
Charlie Stephens Senior Member Join Date: May 2010 Location: Southern California Posts: 7,031	Re: 4 Blade fan hits radiator. Does your hand crank line up properly if you try to crank the car? Charlie Stephens

08-25-2012, 12:15 AM	#11
pat in Santa Cruz Senior Member Join Date: May 2010 Location: santa cruz, calif Posts: 2,011	Re: 4 Blade fan hits radiator. I worked on a 39 Ford with that problem. Turns out the fan was for a truck, and the blades were longer than one for a car, so they hit the lower radiator core. ever try to replace a water pump equipped with a 4 blade?? the radiator has to come out. With a 2 blade, it does not. The advantages of a 2 blade out number the 4 blade in performance, fit, appearance, and cost.

08-25-2012, 07:52 AM	#12
1931 flamingo Senior Member Join Date: May 2010 Location: new britain,ct 06052 Posts: 9,390	Re: 4 Blade fan hits radiator. Try loosening the radiator mounting bolts and move the rad forward at the bottom?? Are the blade lengths the same on the 4 blade as the two blade?? Fan "seated" on the w/pump shaft?? Paul in CT