Fan blade on Dart broke today

Heating / Cooling / AC

  1. Mopar to ya

    Mopar to ya Well-Known Member

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    I hauled my motor to my buddies shop today, so I have the motor and tranny there waiting to go into the Dart in a week and a half. The time was almost perfect. I could drop off my brother's truck, drive home, drop the Dart at my buddies shop and be there just in time for my wife to get off work and pick me up. Sweet! I was driving down the highway at 65 mph and I thought I had a flat tire. It was shaking badly. I pulled over and at idle it was shaking so violently I thought the dash was going to fall off. I shut it off, got out in rush hour traffic and popped the hood. The first thing I saw was the alternator belt was off. Then I see two blades from the fan lying on top of the power steering pump. How the hell does that happen? It was running very well considering it was only 40 degrees out.

    View attachment Broken fan blade.jpg

    View attachment Broken fan blade 1.jpg
     
  2. toolmanmike

    toolmanmike Moderator Staff Member FABO Gold Member

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    How many blades? What diameter? Clutch? I may be able to help. tmm
     
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    • dustermaniac

      dustermaniac Senior Member

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      Ouch!!! Lucky it didn't shoot through the radiator.
       
    • GEO

      GEO Sarcasm Inc.

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      Looks to me like the bolts were loose or to long and bottomed out before they made contact
       
    • 70DartSedan

      70DartSedan Not Banned - just hiding

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      Maybe over torqued and the fan fatigued with the speed of rotating
       
    • bremereric

      bremereric Well-Known Member

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      Or the hood.
       
    • jimjimjimmy

      jimjimjimmy lobsterman FABO Gold Member

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      same here
       
    • Mopar to ya

      Mopar to ya Well-Known Member

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      I have been driving it this way the entire time I have owned the car. You would think I would have felt a vibration at least. The rest of the fan is firmly bolted on. At 65 mph with my rear end I am just shy of 4000 rpm. I never heard a bang or clank or anything. It just started vibrating and I thought I had a flat. I was pissed because I finally bought a spare and a jack base for the car and they were both back in my garage! The radiator is fine, as you said, thank goodness. The hood appears fine as well, and I just painted top and bottom when I put the scoop on. Thank goodness, because the underneath part of the hood looks as perfect as the top.
       
    • Mopar to ya

      Mopar to ya Well-Known Member

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      I would buy that. My rpm is high. It sucks because this motor comes out in 10 days and I wanted to reuse that fan blade.
       
    • inkjunkie

      inkjunkie Well-Known Member

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      Happened to me once, took out the radiator. Previous owner had put studs in the water pump and the unthreaded section was a bit to long......
       
    • Brad426

      Brad426 Well-Known Member

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      Yikes!
       
    • Bulldozer

      Bulldozer free ice cream sandwiches

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      i have never in all my days seen that happen. i chopped up a cat up once that was sleeping on my warm engine on a cold day, threw cat guts everywhere, scared the sh*t out of me, made a helluva racket
       
    • toolmanmike

      toolmanmike Moderator Staff Member FABO Gold Member

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      I don't think the hub would turn if the bolts were bottomed out. The water pump hub is tapped all the way through. tmm
       
    • Mopar to ya

      Mopar to ya Well-Known Member

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      Did that once too. Thank goodness I was parked next to a dumpster.
       
    • 412 Stroker

      412 Stroker Well-Known Member

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      Boy I have a flex fan on mine now and I bought a 7 blade fan and thermo clutch, and now I am worried this might happen to me, did you have a shroud on?? and how many blades was it and did you have a thermo clutch or was it direct drive??
       
    • michformulaS

      michformulaS Well-Known Member

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      I had one blade turn 90 degrees into my raditator in my 70 340 duster years ago. I punched it and heard a terrible noise and steam. Opened the hood and there it was one blade bent 90 degrees into the rad. Weird and frustrating.
       
    • Mopar to ya

      Mopar to ya Well-Known Member

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      Direct drive 7 blade flex fan with shroud. Missed the radiator and shroud and was laying on top of the power steering pump. I wanted to reuse this fan on the new motor because it kept the temp at or below 200 all summer long. It worked well.
       
    • pishta

      pishta I know I'm right....

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      I got a thermo-clutched one if you need it. Off an 86 TRuck. Its huge though 20" , Ill put it in the sale section if you dont need it, PM me.
       
    • green1

      green1 Well-Known Member

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      A flex fan will cut/kill you to death. Can you take a pic of it, looking head to the break? Any signs of fatigue?
       
    • Mopar to ya

      Mopar to ya Well-Known Member

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      The car is 40 miles away in my buddies shop right now. I won't get there until Saturday most likely. I'll take the rest off and inspect.
       
    • Oldmanmopar

      Oldmanmopar Going left turning right FABO Gold Member

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      If the car is not original and your not worried about having the original fan go electric. You'll never have that happen again. You'll also free up some ponies.
       

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    • 1970Duster

      1970Duster Well-Known Member

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      100% agreed on that! Also who made the fans and rad?
       
    • Oldmanmopar

      Oldmanmopar Going left turning right FABO Gold Member

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      B-cool rad and fans. Rad. was modified for AN fittings by my son.
       
    • Dartnut

      Dartnut Don't hate me because i'm beautiful

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      I was thinking that the fan was slightly bent at one time, the water pump was bad, or the fan was just fatigued by constant high revs.....
      I'll bet your water pump is toast now too if it wasn't before.
      Yes, i agree that you were very lucky that it wasn't worse!
      Just thinking/typing out loud.........
       
    • Badart

      Badart Senior Member

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      That sucks, but here is a story for you. I used to own an early 80's Jeep Grand Wagoneer. I was driving it down the highway one day and BOOM, RRRRR then steam everywhere. I pulled to the side of the road. Then a second later I see a ford van pull in front of me. I figured that they stopped to see if I needed help, so I popped my hood and my fan and water pump shaft were gone. I walked up to the van to see if I could get a ride and it was one of those handicapped vans and the lady inside said that she ran over and was dragging whatever I lost.

      I looked under the rear axle of her van and my fan was wedged between her rear axle housing and brake line and it was pouring brake fluid out of it. Well not only did I get to pay for the tow and brake line on her van I had to limp my Jeep to the nearest autozone and fix it in the parking lot. Not a good day. So you should feel lucky.
       
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