MoparFins

Techical Discussions => General Tech => Topic started by: R. Dave Carr on February 13, 2012, 08:18:32 PM

Title: Radiator fan
Post by: R. Dave Carr on February 13, 2012, 08:18:32 PM
Guys, what fan set up do you prefer, the 5 blade clutch or the 7 bl;ade clutch?  Newport has a direct drive 7 blade now.
 
 
 
Dave
Title: Radiator fan
Post by: R. Dave Carr on February 14, 2012, 03:57:21 AM
3 different choices I've found:
 
http://www.ebay.com/itm/320691475166?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 (http://www.ebay.com/itm/320691475166?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649)
 
 
http://www.ebay.com/itm/200712247803?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 (http://www.ebay.com/itm/200712247803?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649)
 
 
 http://www.ebay.com/itm/190635399351?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 (http://www.ebay.com/itm/190635399351?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649)
 
carrman2012-02-14 08:58:56
Title: Radiator fan
Post by: Guests on February 14, 2012, 08:52:26 AM
The least expensive of the three, which ever one you can get. Solid blades and clutch fan, all are good, just don't use a flex fan, they flatten at higher speed and slow the flow of air and tend to overheat that way.
Title: Radiator fan
Post by: R. Dave Carr on February 14, 2012, 09:33:38 AM



Never liked flex fans for that reason!
carrman2012-02-14 14:33:57
Title: Radiator fan
Post by: Brian on February 14, 2012, 11:02:30 AM
I know Leaburn runs the 5 blade fan that was used on most RWD mopars from the 80's to 90's.  They pull just as much air as the 7 blade fans, but have a bit less rotating mass.

I have several 7 blade fans, different OD and clutch vs non-clutch, as well as a 5 blader...I'm currently running a 7 blade fan with a clutch on the wagon.



Title: Radiator fan
Post by: Brian on February 14, 2012, 11:05:15 AM
Man when I was having some cooling issues...turned out I had the distributor hooked to full vacuum on the carb so was running full advance all the time.  Anyway I switched to a fixed 7 blade with a shroud...man did that thing pull air!!  I was adjusting, and checking my distributor and had the motor revving at 2000 rpm...I could barely keep my eyes open while leaning over the front of the car. And it makes a bit of noise as well.

Title: Radiator fan
Post by: R. Dave Carr on February 14, 2012, 11:19:05 AM


Just needs a clutch!!!  Amazing what you find when you go look.....;-)
Title: Radiator fan
Post by: Guests on February 14, 2012, 11:32:08 AM
Works for me.
Title: Radiator fan
Post by: Steve on February 14, 2012, 12:31:01 PM


Just remember the rigid blades will take power and hurt MPG
Title: Radiator fan
Post by: R. Dave Carr on February 14, 2012, 01:28:27 PM


Clutch fan will be better than direct drive fan I have now.
Title: Radiator fan
Post by: R. Dave Carr on February 15, 2012, 04:55:19 PM
Pop quiz!  What size bolts to attach new clutch to water pump?
Title: Radiator fan
Post by: Guests on February 15, 2012, 05:28:23 PM
1/2 inch wrench, so 5/16 fine thread if not mistaken. Carb studs are the right size.
Title: Radiator fan
Post by: R. Dave Carr on February 15, 2012, 05:37:41 PM
Length?
Title: Radiator fan
Post by: Steve on February 15, 2012, 06:10:57 PM


Grade 5  or 8   5/16 - 18  Not 24 like Ed said,  They're USS  Not SAE.  He's in the 50's     Damned Swabbies  (http://www.moparfins.com/forum/smileys/smiley2.gif)(http://www.moparfins.com/forum/smileys/smiley2.gif)
Title: Radiator fan
Post by: Guests on February 15, 2012, 07:10:47 PM
Yeah, OK, so I was backwards. For some reason I was thinking fine, not course. Oh, well, he would have figured it out, can't do everything to jog your memory, can I?
Title: Radiator fan
Post by: R. Dave Carr on February 15, 2012, 07:13:12 PM
Well I have the bolt bins at work I can borrow from....
Title: Radiator fan
Post by: Steve on February 16, 2012, 12:09:22 PM

Quote from: dana44
Yeah, OK, so I was backwards. For some reason I was thinking fine, not course. Oh, well, he would have figured it out, can't do everything to jog your memory, can I?
Dave take spares,  Factory is a split washer.  As long as the bolts don't hit the water pump, anything will work.  The longer, the longer it takes to tighten.  You only need about 1/2 and inch on the inside of the pully
Title: Radiator fan
Post by: R. Dave Carr on February 16, 2012, 12:56:06 PM


Well I have a range of lengths available, so I thought I'd try and get right ones the first time....  Sending fan to powder coaters to get blasted and coated black.  20 bucks. Pays to have businesses like that leasing space from my employer.
Title: Radiator fan
Post by: R. Dave Carr on February 17, 2012, 04:51:07 AM


 
Title: Radiator fan
Post by: R. Dave Carr on February 23, 2012, 09:55:14 AM


Fan works well, looks nice!  Had to make a little clearance down low.  Blades would barely touch bottom tank lip under accleration, just a touch.  Fan is a lot closer to the rad now.
Title: Radiator fan
Post by: Steve on February 23, 2012, 10:39:40 AM


I had that problem with the 62 also.  The safts on the clutches are too long.  Those fans are generic, and mostly for small block mopars.  I ended up with a high quality flex fan.
Title: Radiator fan
Post by: Guests on February 23, 2012, 10:57:58 AM
High quality flex fan.
 
Isn't that an oxymoron?
Title: Radiator fan
Post by: R. Dave Carr on February 23, 2012, 11:28:56 AM

Quote from: POLARACO

 
Title: Radiator fan
Post by: Steve on February 23, 2012, 03:52:24 PM

Quote from: dana44
High quality flex fan.
 
If it's not hitting, don't worry about it
Title: Radiator fan
Post by: Guests on February 23, 2012, 06:27:58 PM
As long as you can get a pencil between the tips and the shroud, you have enough clearance to be safe.
Title: Radiator fan
Post by: R. Dave Carr on February 24, 2012, 04:22:17 AM


Shroud?  What's a shroud?   (http://www.moparfins.com/forum/smileys/smiley2.gif)
Title: Radiator fan
Post by: Guests on February 24, 2012, 06:02:50 AM
Adjust it so it doesn't hit the bottom tank. I thought it was tuoching a shroud "just a tiny bit", which, within a short period of time, will eat through the water tank. Figure out exactly where it is touching and either shorten the spacer, which is a lot easier than trying to cut the tips of all those blades. I don't think you can move the radiator down, or out, to clear the tank.
Title: Radiator fan
Post by: R. Dave Carr on February 24, 2012, 06:21:16 AM


It's adjusted and no longer touching anything.  It has no spacer on it at all.
Title: Radiator fan
Post by: Steve on February 24, 2012, 07:04:49 AM

Quote from: dana44
As long as you can get a pencil between the tips and the shroud, you have enough clearance to be safe.
Boy Ed that's pretty tight.  I was taught the thumb rule on that
Title: Radiator fan
Post by: Guests on February 24, 2012, 07:58:29 AM
3/8ths inch is enough to allow safe clearance, but metal on metal is not good over time, it will wear out the copper tank and start leaking. I don't know how much the spacer needs to be shortened in order to give this minimum clearance, flat sanding may be a little hard to do unless you have a sanding belt where he can hold it square and shorten it. Mill or lathe cut would be the best/right way to do it.
Title: Radiator fan
Post by: R. Dave Carr on February 24, 2012, 08:26:03 AM


It was a couple blades that needed bent back ever so slightly.  All is well now.  Well as far as the fan anyway.  Now I need to pull the gas tank, replace the steering box, replaced the fuel line, pull the transmission to reseal it, etc......
Title: Radiator fan
Post by: Guests on February 24, 2012, 09:14:12 AM
One job at a time, that's what I say.
Title: Radiator fan
Post by: Brian on February 24, 2012, 10:56:58 AM
Be careful about bent blades...The whole fan it's self might be tweaked, thus causing and imbalance.  This imbalance will eat up water pump bearings mighty fast.  I would look for another fan to replace this one. 

Another problem with an imbalanced fan is it could cause one of the blades to come loose and cause some major carnage under the hood.