Front shock replacement advice
How difficult is it to replace the front shocks on the e28 M5? Do I need special tools? I have never done this before but am eager to try. Is it a bad idea to jack the car up with the jack on the subframe? What shocks are recommended Koni vs Bilstine?
The ride is currently harsh and undamped when hitting small holes and cracks in the road. The front end is in good shape with a new drag link installed. All other components are sound. I think the existing shocks are Koni and may be adjustable. The steering is a little vague unless I am actively steering and cornering. Could this be a symptom of bad shocks? When I do a "push down" test on the front I can barely get it to move, maybe an inch or two with approx 150lbs of force.
Thanks for the help!
The Bentley 5 Series E28 manual has the procedure
in it, it will also have the tools necessary to complete the job safely. The only major tool that the home mechanic may not have will be a coil spring compressor, which I consider necessary. Air tools make the job much easier but are not necessary. I would put front strut cartridge replacement at about a 4 or 5 on a scale of ten.
Your choice of shocks will depend on what you want to do with the car. Do you still have the SLS rear suspension? If so and you are not planning on tracking the car I'd recommend going with stock replacements and enjoy the "touring car" ride. If you are going to track the car you will need to balance the front and rear suspension components and settings.
If you do have adjustable Koni's on the front they may be rebuildable, you will have to research that if you can have the car down for the turn around time.
I jack my E28's with a hydraulic floor jack (with a piece of 2 X 6 pine on the jack pad) under the factory jacking points. I will then put jack stands under the subframe rails in the front and/or under the rear subframe when working under the car.
Re: The Bentley 5 Series E28 manual has the procedure
The factory SLS was replaced with a Dinan stage 1, seven years and 56k miles ago. The front struts and shocks are indeed Koni and are both externally adjustable. It seems to me that unless the car has been driven hard over rough roads that the struts and shocks should last more than 60000 miles. No? I am wondering if they simply need to be adjusted. I will call the guys at Dinan and get their input.
Thanks for your help! I will post the response from Dinan once I get it.
I did mine last summer at home
was not a hard job, I borrowwed a spring compressor .
I put in Factory original shocks.. same part number as a 635.
I am happy with them so far.
only driven a few miles on them though.
I spent most of my time time cleaning everything in the wheel wells to make it look all new in there.
What size whell and tire combination are you >>>>>
running. These front ends get "twitchy" with any tires much larger than a 225/50 X 16" especially "High Performance" read stickey rubber.
you mean like bump steer?
That happens when you start stiffening up the suspension, shocks for example even stiffen up the car depending on dampening rate.Check your toe angle, they should be toe-in , the front end also likes to have random left or right alignment issues when there is almost no toe in or toe out, ask me how i know O_O