 Torsion Bars, Life span ? |
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| jim_hoyland |
 Jun 5 2021, 10:29 AM
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#1
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Get that VIN ?  Group: Members Posts: 9,318 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California 
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Curious; Do torsion bars wear out ?
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| mepstein |
Jun 7 2021, 05:02 AM
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#2
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914-6 GT in waiting Group: Members Posts: 19,313 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
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I think it’s a weak spot from corrosion or rubbing that does them in.
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| Superhawk996 |
Jun 7 2021, 06:00 AM
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#3
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914 Guru Group: Members Posts: 5,891 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(mepstein @ Jun 7 2021, 07:02 AM)  I think it’s a weak spot from corrosion or rubbing that does them in. (IMG:style_emoticons/default/agree.gif) Corrosion creates a stress riser. Highly stressed steel abhors a stress riser. QUOTE(jim_hoyland @ Jun 7 2021, 07:56 AM) Can they be tested in the car ? No. They are either working or they are broken. Sag is hard to detect since the torsion bars can be adjusted so sag gets offset over time. Torsion bar is also less prone to sag than a coil spring by virtue to the shorter length of spring steel used in a torsion bar and the larger diameter of the steel. When I took the bars out of mine, they had some serious pitting. Still were functional at the time of removal but they will not be going back into my vehicle. Too much risk of them breaking in the future. Always happens at the worst time. Time for new parts. QUOTE(930cabman @ Jun 7 2021, 06:57 AM) Every motion of a torsion bar introduces stress, after how many cycles can this thing last? I am sure with quality steel these last a long time, but 1/2 century and still rolling. Life of a spring is not measured in time. Spring life is measured as # of cycles of full reversal between two load conditions. Would be measured on the order of # of millions of load reversals. As noted above by Mark, corrosion, nicks, and worn in rub points resulting from from worn bushings are leading cause of death for torsion bars. |
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Posts in this topic
jim_hoyland Torsion Bars Jun 5 2021, 10:29 AM
mepstein I'm no expert but you need to replace if there... Jun 5 2021, 10:54 AM jim_hoyland Thanks for that; how would the ride be affected fr... Jun 5 2021, 11:05 AM
SirAndy how would the ride be affected from both a worn T... Jun 5 2021, 12:08 PM
914Toy
Thanks for that; how would the ride be affected f... Jun 5 2021, 02:40 PM jim_hoyland
They are still the original TBs… Jun 5 2021, 06:20 PM mepstein Worn bar won’t change anything. Broken will be o... Jun 5 2021, 11:08 AM windforfun Mine are almost 50 years old & all is still go... Jun 5 2021, 07:43 PM 930cabman Every motion of a torsion bar introduces stress, a... Jun 7 2021, 04:57 AM jim_hoyland Can they be tested in the car ? Jun 7 2021, 05:56 AM SirAndy
Can they be tested in the car ?
No, but they can... Jun 7 2021, 10:01 AM 930cabman @Superhawk: Exactly how it works.
All the others:... Jun 7 2021, 12:13 PM |
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