1991 S4 vibration at 3000 rpm w/cracked flex plate
01-05-2016, 11:17 AM
#226
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Mike,
Great update.
For the wheel liner... not much can be done. I've got the same issue. Just treat them gingerly and hopefully they will last a bit longer. Just some crappy plastic Porsche decided to use.
For the shock height, I would try cleaning the adjuster collar as best you can with a wire brush and the soaking it with some WD40 or other penetrating lube. Then after it has soaked... and I mean really soaked, try working it back and forth a little at a time. See if you can get it free.
Had a similar issue on a previous car. Shock adjusters were fused (corosion) together. Ended up having to get new adjusters. The shock itself may be fine.
Good luck.
Great update.
For the wheel liner... not much can be done. I've got the same issue. Just treat them gingerly and hopefully they will last a bit longer. Just some crappy plastic Porsche decided to use.
For the shock height, I would try cleaning the adjuster collar as best you can with a wire brush and the soaking it with some WD40 or other penetrating lube. Then after it has soaked... and I mean really soaked, try working it back and forth a little at a time. See if you can get it free.
Had a similar issue on a previous car. Shock adjusters were fused (corosion) together. Ended up having to get new adjusters. The shock itself may be fine.
Good luck.
Any tips of how to get the shock adjuster off? Mine appear to be fused together as well.
Mike
01-05-2016, 02:10 PM
#227
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Hi Fred,
Happy new year to you too! I hope your holidays went well.
The big nut screwed onto the bottom of the shock acting as a catch for the spring - this is called the coilover? Yes, that thing will not move even when I use a large c-wrench and put quite a lot of force on it. I soaked it in lube for several days but still no luck.
Per the ride height I'm using the finger test for now, I can fit 2 fingers between the pass. side wheel and the body panel at the apex. At the driver's side - no fingers fit. When the car sits on a flat surface you can see the difference too. I haven't done an alignment yet (pending this issue).
Mike
Happy new year to you too! I hope your holidays went well.
The big nut screwed onto the bottom of the shock acting as a catch for the spring - this is called the coilover? Yes, that thing will not move even when I use a large c-wrench and put quite a lot of force on it. I soaked it in lube for several days but still no luck.
Per the ride height I'm using the finger test for now, I can fit 2 fingers between the pass. side wheel and the body panel at the apex. At the driver's side - no fingers fit. When the car sits on a flat surface you can see the difference too. I haven't done an alignment yet (pending this issue).
Mike
The coilover is the term used for the complete suspension unit assembly including the spring. Some cars still have separate springs and shock absorbers but most do not these days.
The visual assessment of ride height is somewhat empirical and the correct way to asses ride height is from the points designated for such measurement at the front and rear of the car respectively. The visual relative to the wheel arch should work if the springs have equal rates given the weight is pretty much even. However the recommended approach is to corner balance if one can. The mechanics of the system are that one of the diagonals [front to rear] will take precedence over the other diagonal and the ride heights need to be adjusted to even this out. I had this problem recently, visually the height looked OK [even both sides] but I had an out of balance of about 70kg in favour of the rear driver side to front passenger side axis. To correct this the leading axis has to be dropped or the trailing axis increased and which end of the car you adjust it on depends on the front/rear balance numbers. In my case it seemed the car needed more weight to the rear so I increased the height of the rear passenger side about 3 turns.
The new rear tyres I intend to fit have a larger diameter so I may have to drop both sides at the rear to compensate - then toe will need adjustment- quite an iterative process if one wants to get it spot on.
Rgds
Fred
01-05-2016, 03:20 PM
#228
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Glad you have it to where you can enjoy it. Here is a good ol time link that describes the proper way to measure ride height.
http://members.rennlist.com/pirtle/z...ide_height.txt
As far as the collars, I used a cheap HF press to get the collars off the shocks (I was changing them), and I noted how the ring and collar were very hard to turn. I had to soak and clean the hell out of them to get them to turn freely. This would not be fun while still on the shock.
http://members.rennlist.com/pirtle/z...ide_height.txt
As far as the collars, I used a cheap HF press to get the collars off the shocks (I was changing them), and I noted how the ring and collar were very hard to turn. I had to soak and clean the hell out of them to get them to turn freely. This would not be fun while still on the shock.
01-05-2016, 10:45 PM
#229
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Matt,
I'm glad you're enjoying the car and that it's paying you back for all your hard work
I'm glad you're enjoying the car and that it's paying you back for all your hard work
05-27-2022, 07:50 PM
#230
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Hi All,
Just a heads up, some recent family events require me to move to the east coast, and, unfortunately I have nowhere to keep/store my 928. I listed it here for sale here: https://bringatrailer.com/listing/19...sche-928-s4-4/
Thanks,
Mike
Just a heads up, some recent family events require me to move to the east coast, and, unfortunately I have nowhere to keep/store my 928. I listed it here for sale here: https://bringatrailer.com/listing/19...sche-928-s4-4/
Thanks,
Mike