If there’s one thing I can guarantee that all 360 or F430 cars will need replacing during their life it would be balljoints. Ferrari decided to fit rose joints (called heim joint in the US) where the hub attaches to the wishbones. The OEM joints are made from chrome plated mild steel – when the chrome wears off, moisture corrodes the steel and failure isn’t far behind.
For quite a few years Ferrari wouldn’t sell the balljoints on their own so if you wanted an OEM replacement then you had to buy an entire new wishbone with the joint pre-fitted. This has changed now but the joint material remains the same so unless you are getting them under a warranty they really aren’t worth buying.
Fortunately, there are some aftermarket alternatives. Hill Engineering sell stainless steel ball joints and, in my opinion, one doesn’t need to look anywhere else. There are cheaper alternatives out there (Prosport sell some) but I believe that they are inferior for two reasons. Firstly, the Hill joints have a groove cut into the stem under the head. This groove seats the dust cover which helps keep moisture and debris out of the joint. The Prosport joins do not have this groove. Secondly, the Hill joints are individually calibrated to ensure they contain precisely the correct amount of lash required – too much or too little and the joint will wear prematurely. In my opinion, spending the extra on the Hills joints is worth every penny.
Replacing the ball joints is fairly straightforward. First of all jack up the car, support the weight and removed the wheel.
Next undo the bolt holding the hub to the wishbone. In this case I was attending to upper ball joints but if you need to replace the lower ones then the shock absorber needs to be detached from the wishbone first.
When removing the bolt, take care to ensure the hex bit is fully seated in the head. You will need a long breaker bar to get it started.
Also ensure that you don’t lose the balancing spacer (shown in the picture below) when you withdraw the bolt.
The hub will need to be supported – I use a bungee but zip ties or some chord would suffice.
Now undo the four M8 nuts holding the wishbone to the chassis. Be careful to note the position of any spacers – if they are not put back the same way as they came out then the geometry of the car will change!
The wishbone can now be removed from the car.
The dust covers are removed with circlip pliers.
Once the dust covers have been removed, the joints can be inspected. Although these looked OK, there was play so they had to go.
The joints are an interference fit in the wishbone and need to be pressed out. You can buy a tool from Hill Engineering but I use a couple of pieces of aluminium that I turned up on my lathe.
Before pressing the joint out, heat up the wishbone to break the glue bond.
Old vs new:
The inside of the wishbone needs to be carefully cleaned up. I use a small plastic spatula to get the glue residue off. Inspect the surface for damage.
Next the ID of the hole needs to be measured.
Here are the specs (dimensions in mm):
The joint is glued into place. The correct adhesive is Hysol EA9360 and can be bought from Hill Engineering. Although it is fairly expensive for what it is, I wouldn’t want to try and use anything else on a critical suspension part. Note that the glue can be kept for long periods if you store it in a fridge and take care to ensure the two parts don’t mix.
It is a two part epoxy and needs to be mixed thoroughly, the working time is quite long so there’s no rush. Apply a small, even smear to the outside of the ball joint. Take care not to get any on the inside of the joint.
Now the new joint needs to be pressed into the wishbone. Fit one of the old dust covers on one side of the arm to provide stop and prevent the joint from being pushed too far in. Heat up the wishbone to make the hole slightly larger (also the glue will flow better when it touches a warm surface). Note the below picture was staged without the glue as I needed both hands to perform the operation.
Remove the old dust cover and mop up any excess glue (I use Isopropyl Alcohol). Take care to get it out of the grooves the dust covers sit in otherwise the covers will be bonded in place.
Fit the new dust covers. I like to seal up the circlip holes with silicone – I get a blob and wipe it with my finger round the whole cover. Normally I would use a clear silicone but for the purposes of this picture I used white to make it stand out.
Next the glue needs to set. Ferrari call for the arm to be baked at a low temperature for quite some time. I heat up the wishbone with a low setting on my heat gun in order to get the chemical reaction going. I then place it in a warm place – in this summer weather the garden table was perfect.
Once the glue has set the wishbone can be re-fitted to the car. The bolts attaching the arm to the chassis are done up to 25Nm – don’t forget to put all washers and shims back in the same place.
I like to mark the bolts with Torque Seal in order to keep an eye on them.
Before fitting the wishbone to the hub, clean up the seat where the joint rests:
The bolt needs to be torqued up (65Nm upper, 85Nm lower).
All that’s left is to re-fit the wheel and torque up the wheel bolts (98Nm).
- Ferrari 360 & F430 Ball Joint Replacement
- Ferrari 360 & F430 Track rod End Replacement
- Ferrari 360 & F430 Track Rod Ends
- Hill Engineering Track Rod Ends
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