Ride height

Rebuilding, adjusting, maintaining & alternatives

Ride height

Postby ndevans » Tue Dec 20, 2016 10:14 pm

Evening.

checked the ride height today. Quite a considerable difference between O/S & N/S. On the N/S, 228mm from eyebolt to floor, 216mm from lower trunnion bolt to floor. On the O/S, 171mm from eyebolt to floor, 172mm from lower trunnion bolt to floor.

Is this a problem? Should I adjust the ride height?

cheers N
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Re: Ride height

Postby The vast minority » Tue Dec 20, 2016 10:32 pm

Hi N,
Deffo fix it.
60mm is 2 3/8 and must look horrid.

Can't recall how much one spline raises or drops the corner but it's a lot more than you think. When I last had the wishbones off I got them on a spline out and it made for an inch or so of difference and I couldn't bare to see it. Yours must be 2 splines out or more.

Did you have them off when you had the engine out or is this new? No other probs at the other end of the torsion bar?
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Re: Ride height

Postby Panky » Tue Dec 20, 2016 10:37 pm

One spline is about 1 1/4", but the difference could also be caused by a weak rear spring 'lifting' the opposite corner.
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Re: Ride height

Postby The vast minority » Tue Dec 20, 2016 10:43 pm

Panky wrote:One spline is about 1 1/4", but the difference could also be caused by a weak rear spring 'lifting' the opposite corner.


Very good point, well made. Especially evident with weight in the boot.
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Re: Ride height

Postby ndevans » Tue Dec 20, 2016 10:56 pm

Hmmm. Weak rear springs-how do you check?

I've not had the front suspension apart for some years, but I've thought for some while now that it isn't right. I reckon I probably didn't mark the splines & adjuster vernier properly last time.

Can't say I think there's much wrong handling wise, except maybe it wallows a bit on cornering. I guess uneven ride height also means uneven weight distribution, which has braking & steering implications.Think I'll spend a day getting it sorted in the New Year.

cheers N
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Re: Ride height

Postby Panky » Tue Dec 20, 2016 11:07 pm

To check the rear height you need to jack the front up centrally so the front wheels dangle, not a good idea to use the front cross member but you could use a big lump of timber shaped to fit between and under the chassis rails and use a trolley jack at the central point. Once it's up and dangling you can then measure the height of the rear arches from the floor, on level ground obviously. You can check the front height in a similar way but again the weight of the rear end must be off the springs so another lump of timber across the car just in front of the leaf springs to lift it will be needed.
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Re: Ride height

Postby The vast minority » Tue Dec 20, 2016 11:10 pm

Like this,
I made it from a fence post and 2 bits of scrap wood.

Every minor owner should own one

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Re: Ride height

Postby ndevans » Tue Dec 20, 2016 11:13 pm

Thanks chaps, I think I have some suitable timber. I know what I'm doing over Xmas!

cheers N
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Re: Ride height

Postby Panky » Tue Dec 20, 2016 11:13 pm

Yep that's it :D but without the axle stands in place for the checks.
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Re: Ride height

Postby Panky » Tue Dec 20, 2016 11:20 pm

It would be best to get your jacking point as far forward as you can so as much weight as possible will be on the rear wheels to show up any discrepancy in spring strength.
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Re: Ride height

Postby Custard » Wed Dec 21, 2016 8:30 am

There is a set measurement in the manual for setting it up as standard.

I presume before you measured, it was on a level surface with same tyres on both front wheels at the same pressure.

(ideally the two back wheels should have same tyres and pressures too) so the car is the same side to side.

Roy did a how to guide on front suspension adjustment;

howto_FrontSuspensionHeightAdjustment.php

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Re: Ride height

Postby ndevans » Wed Dec 21, 2016 9:46 am

It was done on a concrete floor, same tyres front & rear, but must admit I didn't check the pressures first. I wouldn't have thought tyre pressure alone would account for a 57mm difference though, unless one was really flat.
I will get the car on a plank of wood, check the pressures and re - measure.

Cheers N
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Re: Ride height

Postby gjoakes » Wed Dec 21, 2016 2:53 pm

ndevans wrote:Hmmm. Weak rear springs-how do you check?

<<<< except maybe it wallows a bit on cornering. >>>>



Often that is an indicator of a broken leaf spring in the rear. Your ride height problems also support this.
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Re: Ride height

Postby Rick1963 » Wed Dec 21, 2016 7:21 pm

Sorry to jump in here but I have searched for the correct ride height but can't find any reference to it, so what is the correct "factory setting" for the ride height?
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Re: Ride height

Postby philthehill » Wed Dec 21, 2016 9:16 pm

The official ride height can be found in Wksp manual illustration R16.
With the bottom link free of the steering swivel and the difference in height between the inner and outer pivot points being 14.3cm (initial assy position) the ride height will be virtually right.
If not quite exact a finer adjustment can be undertaken using the rear adjuster plate.
The distance between the level floor and the front suspension lower inner eye pin center should be 10 11/16".
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