07-05-2017, 11:57 AM | #21 |
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Re: 4 blade fan
My 4 blade fan decided to give up this morning.. I revved the car at the carb when it happened, I'm glad it took the radiator and not my head
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07-05-2017, 12:20 PM | #22 |
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Re: 4 blade fan
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07-05-2017, 12:30 PM | #23 |
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Re: 4 blade fan
I installed 4 blade fans on both of my rigs. This was before I saw all the discussion on the Barn about them. So far so good but do check them once in awhile like it looks like you should do on any fan.
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07-05-2017, 02:34 PM | #24 |
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Re: 4 blade fan
My original 2 blade fan wasn't consistent in shape on the blades. One blade had a hole in it near the end. One blade looked puffy from what is inside that might have been rust swelling. I didn't feel comfortable with it so I bought a new 2 blade from a local vendor. Installed it and measured blade tip distance from the radiator for each blade. good fit and finish. A little over $50 for peace of mind.
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07-05-2017, 03:30 PM | #25 |
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Re: 4 blade fan
Using a 4L fan belt instead of the correct 5L allows the belt to ride low in the groove, which will speed up the fan speed. Also the unbroken blade looks misshapen, so I wouldn't trust it. Buy a new aluminum fan and the correct belt.
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07-05-2017, 04:01 PM | #26 |
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Re: 4 blade fan
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Most of the new aluminum two-blade fans on the market are of good quality. The ones I have purchased from Bratton's worked well. I have a static balancer I check them on. They can easily be balanced by taking metal off one blade. A while back there were some on the market that were not machined properly. Most vendors have discarded these by now. Best not to buy a used one. There are also repo water pump castings around that are oversize and will bind in the fan. When installing one make sure that it seats on the taper properly and it rotates without obstruction. Make sure you install a steel flat washer under the nut to prevent galling into the aluminum and offering a false torque. Tom Endy |
07-05-2017, 04:10 PM | #27 |
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Re: 4 blade fan
I agree with Tom. That blade is bent up not worth the chance. A fan is always bending as it speeds up and slows down. If you ever bent metal back and forth it will break from fatigue. Get a new fan they are good quality now days.
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07-05-2017, 04:18 PM | #28 |
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Re: 4 blade fan
My A has the Ford 4 blade fan on it. Yesterday I idled for miles in the Santa Clarita 4th of July parade. It was a hot day in the mid 90's. The engine temperature never rose out of the operating range. I do have an aftermarket fan shroud on it.
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07-05-2017, 06:05 PM | #29 | |
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Re: 4 blade fan
Quote:
I will change the belt and fan but first i have to find a new radiator |
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07-05-2017, 06:47 PM | #30 |
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Re: 4 blade fan
Chris raises a good question. He has an aftermarket shroud on his car. I have nothing on any of my As, shroud or splash pans and have little or no overheating problems. The only time any of mine will get too hot is when pulling the camper at 50mph in O/D in ambient temperatures in the mid 90s F. I don't think a shroud or pans would help at cruising speed but I can see that they might help at sustained LOW speed (I can't remember the last time I did that anyway). I have only ever seen one Model A with a shroud and never any pans and cars were like that for decades.
So here's the ? How important are shrouds and pans for every day use?
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07-05-2017, 08:50 PM | #31 |
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Re: 4 blade fan
A year or so ago, I discovered a cracked two blade fan on my roadster. I searched several vendors at the time for two blade aluminum fans but all were back ordered. So, I ordered a plastic four blade fan to use until the two blade alum fans were back in stock. After reading all the nightmare stories about broken fans of all types, I decided to leave the plastic one on. I can deal with flying plastic but not metal, thank you.
Glen
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07-06-2017, 02:36 PM | #32 |
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Re: 4 blade fan
I have to wonder why nobody has come up with a plastic two-blade fan attached to a metal pulley that has the appearance of the original fan? The plastic blades could pull sufficient air at lower speeds but flex for lessened drag at high speed and, being plastic, will be less likely to cause injury or damage if one takes flight. Is this a crazy idea, or what?
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07-06-2017, 06:05 PM | #33 |
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Re: 4 blade fan
THis happened to a friend.
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07-06-2017, 06:48 PM | #34 |
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Re: 4 blade fan
I would like to point out that the fan shown is an aftermarket reproduction fan and not the one most people are referring to (Ford part 46-8600).
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07-06-2017, 07:42 PM | #35 |
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Re: 4 blade fan
Charlie, So the fan in your picture is a Ford fan? And the fan in steve s is a aftermarket fan?
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07-06-2017, 08:17 PM | #36 | |
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Re: 4 blade fan
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Charlie Stephens |
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07-06-2017, 09:58 PM | #37 |
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Re: 4 blade fan
What is it with fords and fans ? I had a 1978 Mercury that lost a blade, could not find any trace of where it came off. Because it wasn't a ford it wasn't on the recall, and had to wait several weeks for ford to make one. 8 months later ford did send me a check for the purchase price. I haven't heard of other makes having fan problems?
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07-06-2017, 10:43 PM | #38 | |
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Re: 4 blade fan
Quote:
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07-06-2017, 11:16 PM | #39 |
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Re: 4 blade fan
Two blade aluminum. No vibration and no cracks. Have also used plastic five blade, never saw plastic four blade.
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07-06-2017, 11:19 PM | #40 |
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Re: 4 blade fan
I noticed a plastic fan is much smaller in diameter. Are they all like that?
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