[928uk] S4 Suspension refresh?

[phil rick]

good call on replacing any locking nuts Jonathan + get a good torque wrench
and use it, see link below from Rennlist
https://webfiles.uci.edu/redwards/pu...%209-25-09.xls
<https://webfiles.uci.edu/redwards/public/928%20bolt%20sizes%20and%20torque%20values%209-25-09.xls>
cheers
Phil

On Sat, Jan 28, 2023 at 4:44 PM Jonathan Rackowe via 928uk <
928uk at lists.928.org.uk> wrote:

> On my 928 (a winter driven car) I found that the lower bolts attaching
> front shocks to wheel carriers were rusty, and more significantly the steel
> locking nuts for these bolts had badly rusted worn threads. Porsche have
> these locking nuts as a use once and replace item,  so I'd recommend
> replacing any locking nuts you undo. You can take a view on replacing or
> cleaning up the bolts once you have dismantled the suspension.
>
> Best regards,
> Jonathan
>
> 1991 GT
>
> On Fri, 27 Jan 2023, 2:35 pm Paul R Smith via 928uk, <
> 928uk at lists.928.org.uk>
> wrote:
>
> > Different shocks need different adjusters, so you will probably need to
> > get new ones anyway.
> >
> > If you don't, I can advise how to free them off.
> >
> > Alignment settings won't change if you are only changing the shocks.
> > Different wheel offsets *shouldn't* change the alignment, as far as the
> > rest of the car is concerned, the car is supported by the axle flanges.
> > The really important thing is to get your ride height correct, and that
> > includes settling the suspension for 10 miles or so, (or pulling the car
> > down artificially) after height adjustments, and not lifting the car
> > before alignment adjustments. What this means in practice is removing
> > each seized adjuster, cleaning and greasing it and replacing it in the
> > same position so that it can be adjusted later without lifting the car.
> >
> > The rubber bushes in the suspension arms should all be okay, they
> > usually last well, but check them. front anti roll bar bushes often
> > perish due to oil leaks, and I have seen more than a few ARB drop-links
> > where the rubber bushes have come apart, again check but no point
> > replacing if they are okay.
> >
> > Smiffy
> >
> > On 27/01/2023 14:06, James Harley via 928uk wrote:
> > >
> > > S4 Suspension refresh?.eml
> > >
> > > Subject:
> > > S4 Suspension refresh?
> > > From:
> > > James Harley <jamesaharley at hotmail.com>
> > > Date:
> > > 27/01/2023, 14:06
> > >
> > > To:
> > > "928uk at lists.928.org.uk" <928uk at lists.928.org.uk>
> > >
> > >
> > > Hi all
> > >
> > > I have decided to refresh the suspension on my 89 S4 this year and have
> > started to look at/buy the parts I will need, as far as I'm aware the
> > suspension has never been touched so everything is over 30 years old and
> > pretty rusty. I have decided to go for the M474 option sports shocks, car
> > is currently on the standard ones but I'd like it to feel a bit more
> sporty
> > without becoming overly harsh so fingers crossed. I have ordered the
> shocks
> > and a set of rear springs as the current ones are badly corroded. The
> front
> > springs don't look too bad though so I'm hopeful that a light refurb will
> > sort these.
> > >
> > >
> > >
> > > Ideally I'd change everything but with an eye on costs I'm hoping to
> > clean up and re-use as many components as possible, my question for the
> > list then is what other parts will I definitely need to replace and which
> > ones should be ok to just clean up?
> > >
> > >
> > >
> > > I'm basically thinking that all the rubber parts will need changing,
> > bump stops etc. and that hopefully anything metal will clean up, but I'm
> a
> > bit worried that the threaded sleeves and rings for the ride height will
> be
> > totally seized for example so any insight from those in the know would be
> > greatly appreciated. Thank you
> > >
> > >
> > >
> > > Ps I'm also thinking of changing the front wheels on the car back to
> > ones with the correct offset, ET52 back to ET65, would this need be done
> > before the suspension work though so as not to mess up the final
> > realignment?
> > >
> > >
> > > Cheers
> > >
> > > Jimmy
> > >
> > >
> >
>