Adjusting coilovers R129 Mercedes

Adjusting coilovers R129 Mercedes

Author
Discussion

S8QUATTRO

Original Poster:

912 posts

164 months

Thursday 27th July 2023
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Totally new to coilovers but car came with them on and is too low. Can anyone advise on what to do here to lift the car. First pic is front and second is the rear. I’ve lubricated this evening with GT85

Thanks

ingenieur

4,612 posts

195 months

Thursday 27th July 2023
quotequote all
no pictures here.

But coil-overs adjust using a special spanner which is specific to the model of coil-over you have. No doubt there are generic tools which will do the job.

The height is changed simply by winding the lower spring seat further up the turret.

The supposed advantage of coil-overs is that they can be configured with different springs. So if the ride height is increased and the centre of gravity raised you may find a better spring rate for the new ride height would be required. But you could judge that over time.

S8QUATTRO

Original Poster:

912 posts

164 months

Thursday 27th July 2023
quotequote all
Front


Rear

S8QUATTRO

Original Poster:

912 posts

164 months

Thursday 27th July 2023
quotequote all
Currently sits like this - previous owner set up


But prefer it to look factory like these


ingenieur

4,612 posts

195 months

Friday 28th July 2023
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Does look a bit broken with it sitting that low. Like there's something wrong with it.

You use the spanner to turn the silver bit at the bottom with the notches in it. Wheel has to be off to get access and would have to be off the ground to relieve weight.

ingenieur

4,612 posts

195 months

Friday 28th July 2023
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This is what the spanners look like.


HustleRussell

25,544 posts

174 months

Friday 28th July 2023
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There are actually two threaded collars on each coilover and they’ll be locked against each other in exactly the same way you tighten a locknut against a nut. Before you can adjust them you’ll need to loosen them off of one another i.e. get two C-spanners, use one to hold the top collar still and the other to wind the lower one down in the opposite direction.

Belle427

10,468 posts

247 months

Saturday 29th July 2023
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Doing this at home is a bit of a pita to be honest.
Putting it up on a ramp in a garage may be simpler.

ingenieur

4,612 posts

195 months

Sunday 30th July 2023
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Belle427 said:
Doing this at home is a bit of a pita to be honest.
Putting it up on a ramp in a garage may be simpler.
A lot of stuff is easier on a ramp but who wants to give up their ramp without charging? And if it has to be done more than once is the workshop going to keep the ramp free all afternoon while you come on and off? Of course if you have access to a non-commercial situation there might be less pressure / expense!

Old Merc

3,681 posts

181 months

Sunday 30th July 2023
quotequote all
You say that you prefer factory, so get your lovely R129 back to factory spec’.
Put all that stupid stuff in the bin, fit O/E springs and shocks. Get a Mercedes specialist to adjust the geometry, particularly the lower wishbones.
I had this done on my R129 and it drove like a different car.

bolide

581 posts

268 months

Monday 31st July 2023
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Obviously those aren't coilovers as the springs are mounted inboard on the R129 / W124 chassis. They're aftermarket springs with adjustable perches. Which begs the question, what dampers are fitted?

You could fit longer springs of the correct rate and leave it, or revert to the factory spec

Re front wishbones, the bushes deteriorate over time, helped by traditional MB engine oil leaks, and the cars are improved by replacing them. If the car understeers badly, and ploughs straight on at low speed with lock on, that's a symptom of worn bushes

Nick Froome