F430 Front and rear end knock 430 Scuderia - Ferrari Life
 
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post #1 of 10 Old 07-25-2017, 04:00 PM Thread Starter
 
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Front and rear end knock 430 Scuderia

Hello all!

New to this forum. Have read a couple of threads on this, and yet no certainty.

On the 430 Scuderia I have a front and rear and knock sound, when going over small bumps

The milage is 25 thousand miles.

What has been done by now ( and the problem remains) :

-all front wishbones with bushings new
-all front and rear shocks bushings new
-in the rear all wishbone bushings and ball joints new
-in the front sway bar links new
-sway bar bushings new
-all hub bearings new

Basically, the only things that has not been replaced with new are the shocks. Could be the source of the sound? But they don't leak..

Thanks in advance! P.S. have tried to grease the sway bar bushings, does not help...
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post #2 of 10 Old 07-26-2017, 12:34 PM
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Yep...and how long ago were these repairs done?
Front ball joints? Pretty much a throwaway at 15K miles.
Mot of the other suspension components, particular if the car is driven in wet or sandy climates are "throwaway" items.
The shock to control arm "special bolt" in the front could be an issue.

Rear tie rod socket at chassis?

A set of chassis "ears" might be helpful at this point. Is the car being serviced by someone familiar with the known issues or just throwing parts at the car? The 360 and 430 have spectacular chassis's, but the components have short lives. Some of the replacement junk that Ferrari provides is part of the problem.

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post #3 of 10 Old 07-28-2017, 07:37 AM Thread Starter
 
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Dear David, thansk a lot

I will as a matter of fact used chassis "ears" to check, good idea!

Also, what could be wrong with that special bolt? I can replace that of course too

Thank you
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post #4 of 10 Old 07-28-2017, 07:42 AM Thread Starter
 
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bolt part number

The shock to control arm "special bolt" in the front could be an issue.

Do you mean this bolts:

204977 - front

204974 - rear

??

thank you!
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post #5 of 10 Old 07-28-2017, 09:11 AM
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Quote:
Originally Posted by georgers View Post
The shock to control arm "special bolt" in the front could be an issue.

Do you mean this bolts:

204977 - front

204974 - rear
Yes. These are the bolts I'm referring to. My memory is a bit foggy here, as I recall a TSB regarding an "improved design." The area in which they pass through the control arm should be inspected, as well. Specifically, the "black" area of the bolt is a precision fit in the arm and has a coating which can wear away. Also, the sway bar bushings and side play can cause noise issues. As I mentioned earlier, all of the suspension components are high wear and have a 15-20K mile life, +/-

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Last edited by David @ FluentInFerrari; 07-28-2017 at 11:27 AM.
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post #6 of 10 Old 07-31-2017, 02:37 AM Thread Starter
 
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Quote:
Originally Posted by David @ FluentInFerrari View Post
Yes. These are the bolts I'm referring to. My memory is a bit foggy here, as I recall a TSB regarding an "improved design." The area in which they pass through the control arm should be inspected, as well. Specifically, the "black" area of the bolt is a precision fit in the arm and has a coating which can wear away. Also, the sway bar bushings and side play can cause noise issues. As I mentioned earlier, all of the suspension components are high wear and have a 15-20K mile life, +/-
Thank you David!

I will inspect this area and the "black" area, the coating.

Good to know about the sway bar bushings, although they has been replaced.

Thanks again I will keep looking.
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post #7 of 10 Old 08-02-2017, 09:16 PM
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The knock sounds with these lower control arm bolts are quite common. As David said, they require regular maintenance or replacement.

To avoid these knock sounds coming from the small play left between this bolt and the damper, you need to apply Molykote 1000 paste on it quite often. It's a very thin paste. Do this on all 4 control arms at a very regular basis and it will reduce noises and wear. Eventually, the bolts have to be replaced.
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post #8 of 10 Old 03-10-2019, 01:05 AM
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did you resolve this issue pls ?
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post #9 of 10 Old 03-10-2019, 03:09 AM
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Hi Richard, I ended up replacing all 4 of them as they were worn out. Since then, no knocking noise anymore.
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post #10 of 10 Old 03-14-2019, 12:21 PM
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sure thks but after 7,000 road only miles in my SCUD it has to be something else
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