Re: [Chrysler300] Burt’s Comments/ 57 Torsion bars
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Re: [Chrysler300] Burt’s Comments/ 57 Torsion bars



Hi, John:

My E has boots on the bar that fit into grooves on the torsion bar anchors. No boot at the lower control arm. The bars on my E were slightly rusted and the bar on the passenger's side lower control was rusted fast. I took  the lower control arm with the torsion bar "frozen" inside, hung the lower control arm over the side of the bench, wrapped the bar at the other end with cloth, attached a pipe wrench to the bar where it began to flair and hammered the wrench until the bar was free.

Also, there is no flexible coating on the bars as there is on my '64. I used Eastwood's rubberized paint on the bars to handle the twisting of the bar while driving. I will use lots of grease on the bar ends when installing (as recommended in the '64 shop manual).

Best,
Ron Kurtz
E #292

--------------------------------------------
On Fri, 8/17/18, John Grady jkg@xxxxxxxxxxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:

 Subject: [Chrysler300] Burt’s Comments/ 57 Torsion  bars
 To: "chrysler300@xxxxxxxxxxxxxxx" <chrysler300@xxxxxxxxxxxxxxx>
 Date: Friday, August 17, 2018, 8:58 AM
 
 
  
 
 
 
   
 
 
     
       
       
       One of the things Burt spoke of at Keith’s home,
 was the suddenly discovered stress corrosion of 57 torsion
 bars at the end sockets . I know of this first hand , as
 going around a rotary ( Massachusetts bad idea) at very high
 speed as a passenger “ up on two wheels type thing “ in
 1960 , in a 57 plymouth the highly loaded  one snapped ,
 putting 4 of us into guardrail .. Totalled the car . Had same
  thing  happen to me in a 51 ford at same place , ( steering
 box tabs broke off box at frame  bolts in those ) — maybe
 it was just me at 17. Or debugging designs! 
 
 Burt described packing them with heavy grease when they
 found this out (  a line of corrosion encircles the bar at
 the mouth of the hex socket , due to salt rust etc . ) That
 raises stress , like a notch leading to failure . Being a
 spring in essence , the steel skin  is highly stressed
 there. 
 
 I loved how he calmly described this . Failure in
 engineering in new designs happens , somewhat normal , life
 testing  3x expected use is the only way to find obscure
 things — but spraying it with salt probably not part of it
 , that year. Bet it is now. We forget that “ torsion aire
 “ ride was a major suspension and engineering innovation ,
 a part of the 57 cars .. lots of new parts never used before
 . 
 
 I am working on a 57 dodge , and I know later years ?58 59
 May have rubber boots for this , 60 does . Is it at both
 ends of bar ? When did boots start ? Do they fit 57 ?
 Because I never saw a failed one , seeking info on this .
 Bad surprise awaits if not addressed , and the older the car
 more likely to happen . Pack with heavy grease at least .
 Bar interchange ?? 
 
 When it snaps wheel goes way up into fender hits upper stop
 , iF in a curve at high speed can lose control .
 
 Good thing to bang around , prompted by  the meeting with
 Burt .  
 
 Thank you Burt ! 
 
 Sent from my iPhone
 
     
      
 
     
     
 
 
 
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------------------------------------
Posted by: Ronald Kurtz <mark6268@xxxxxxxxxxxxx>
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