S1 fitting torsion bars

Technical advice Q&A

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phoenix
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#1 S1 fitting torsion bars

Post by phoenix » Mon Oct 27, 2025 3:21 pm

:rvrence the torsion bars is best to fit the front or rear of the bar first. After fitting the spacer in place of shck absorber.
S1 4.2 RHD Bryan

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mgcjag
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#2 Re: S1 fitting torsion bars

Post by mgcjag » Mon Oct 27, 2025 4:36 pm

The front must be fitted to the wishbone first....then the rear bracket slid rearwards onto the splines and the bolt holes lined up....however its trial and error untill you get the correct orientation of the splines at the front....the bar is a vernier adjustment with diffetent number of splines front and rear....the service manual gives a very detailed description of how to fit/adjust....Steve
Steve
69 S2 2+2 (sold) ..Realm C type replica, 1960 xk150fhc

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rfs1957
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#3 Re: S1 fitting torsion bars

Post by rfs1957 » Tue Oct 28, 2025 10:37 am

Key thing to understand, which - as Steve says - is amply detailed in the Manual, is that you HAVE to have a setting-bar with correct-diameter holes on correct centres when you are fitting a torsion bar.

There are 24 splines on one end, 25 on the other, that gives 24x25 potential front/rear couplings, or 600 in all, which equates to a precision of 0.6°.

And this determines the ride-height.
Rory
3.8 OTS S1 Opalescent Silver Grey - built May 28th 1962

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