 Flapper Box Broken Spring - Junk? |
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| DennisV |
  Jun 11 2023, 07:58 AM
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#1
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Member  Group: Members Posts: 468 Joined: 8-August 20 From: Santa Rosa, CA Member No.: 24,575 Region Association: Northern California 
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In the process of refurbishing our flapper boxes (AKA Flap Control Box Heat exchanger), one of the springs broke and fell out. I see no way to replace it. Is this box junk now?
 I assume that best case, it will not close completely. Worst case, it binds and gets stuck open. It opens and closes OK on the bench, but if I go through the full throw of the arm, the lip of one of the sealing plates can catch and get stuck. When installed on the car, will this actuate from stop to stop or just the mid range? |
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| Superhawk996 |
Jun 11 2023, 09:47 AM
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#2
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914 Guru Group: Members Posts: 5,819 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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(IMG:style_emoticons/default/headbang.gif) Ugh!
I have a couple of 914/6 flappers that failed the same way. I don’t have an easy fix to post but will watch to see what other might have done. In my case I’m keeping the /6 flappers with the idea that maybe someday I’ll split them open and repair them but to be honest it looks like a lot of work just to have an original /6 flapper. Of course /4 flappers will work just the same but if you’re going councours it might cost ya’. |
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| bdstone914 |
Jun 11 2023, 09:51 AM
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#3
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bdstone914 Group: Members Posts: 4,520 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
I have ground off the rivet head that holds the flaps together and replaced the spring from a box that was in worst shape. I used a 4mm bolt with nyloc bolt the reassemble.
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| Superhawk996 |
Jun 11 2023, 09:57 AM
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#4
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914 Guru Group: Members Posts: 5,819 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(bdstone914 @ Jun 11 2023, 11:51 AM)  I have ground off the rivet head that holds the flaps together and replaced the spring from a box that was in worst shape. I used a 4mm bolt with nyloc bolt the reassemble. (IMG:style_emoticons/default/aktion035.gif) Now that an idea worth considering - thanks! I knew someone would have ideas on this. |
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| 930cabman |
Jun 11 2023, 11:24 AM
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#5
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Advanced Member Group: Members Posts: 3,058 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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QUOTE(Superhawk996 @ Jun 11 2023, 09:57 AM) QUOTE(bdstone914 @ Jun 11 2023, 11:51 AM) I have ground off the rivet head that holds the flaps together and replaced the spring from a box that was in worst shape. I used a 4mm bolt with nyloc bolt the reassemble. (IMG:style_emoticons/default/aktion035.gif) Now that an idea worth considering - thanks! I knew someone would have ideas on this. The beauty of this forum (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) |
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| rhodyguy |
Jun 11 2023, 12:07 PM
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#6
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,080 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
No doubt.
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| DennisV |
Jun 11 2023, 02:50 PM
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#7
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Member Group: Members Posts: 468 Joined: 8-August 20 From: Santa Rosa, CA Member No.: 24,575 Region Association: Northern California
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QUOTE(bdstone914 @ Jun 11 2023, 08:51 AM) I have ground off the rivet head that holds the flaps together and replaced the spring from a box that was in worst shape. I used a 4mm bolt with nyloc bolt the reassemble. Interesting! Did you disassemble the halves of the box to make it easier to replace the springs? If so, how did you get it apart without destroying it? |
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