Replacing Wishbone at Porsche 944 S2

Hi my friends, today we address a new problem of my 944 S2 i.e. a worn ball joint at the wishbone For the removal of the wishbone it's necessary to jack the car and it's better to remove the wheel A worn ball joint you detect with the pry bar You see the play At a good joint the distance is smaller and prying shows no play For the removal of the wishbone the stabilizer has to be removed first For this job there is a special video, watch it now Remove also the baffle plate, you'll have better access Some people call the wishbone triangular control arm because it has 3 mounting points One here at the steering knuckle and two at the chassis Here it's not critical, it's just a long bolt But the rear mount allows adjusting the caster angle The adjustment is made by an eccentric bolt inside here I mark the position of the eccentric bolt The outer side is not critical, there is nothing adjustable The camber angle is adjusted at the strut I apply rust remover to all nuts And also here I start with the bolt in the front And the nut is loose First with the breaker bar and then with the ratchet When it's loose, I have to counter it Like this it's fine Let's try it at the ball joint Oh, this one is quite stuck The bolt is turning, thus I have to counter the other side Okay, with countering and it's loose And we can continue with the ratchet Now it's easy with the ratchet Remove the bolt completely, it has a lock nut At the rear I need brute force Here you see the adjustment of the caster The ball joint moves fore and back by this, we have to put it back on our mark Remove the nut and the washer Here we are free Use a hammer to punch the bolt out, the joint is free now It's possible to remove the joint from the knuckle with the pry bar Here it's out Remove this bolt completely The head of the bolt is in front as usual for chassis parts Again we need a decent bunch with the hammer At the boot of the steering rod is just enough place Use a punch And it's out Pull the wishbone downwards, and a punch with the hammer on the rear And we have the wishbone For working at the chassis you need gross motor skills Before having a close look to the problem, I clean the wishbone The boot has a spring wire, here in red, surrounding the boot twice At the top is a metal ring The upper ring isn't segmented, it has to be removed in one piece Use a plant screwdriver to go under the wire, one turn around and you have it You can pull the boot from the ball joint You can remove the boot together with the upper ring Here you see the problem, the internal bushing is already missing I'll reuse the bolts, I'm going to overhaul them by recutting the threads The lock nuts we have to replace by new once, I measured the thread It's a normal M10 thread having 1,5 mm pitch, it not a fine thread Use a drop of oil and work the threading die over the bolt The thread is running like in the first day The same procedure with the bolts at the inner side, take care it's not a nominal thread It is a 12 x 1.5 mm fine thread, you'll need a 12 x 1.5 lock nut A well stocked household has also such nuts Recut the inner bolt with the 12 x 1,5 mm threading die The eccentric bolt remains at the car, thus we have to recut the thread there Here it's a little narrow, good that we have a die stock with removable handles For the wishbone we have now 3 options Number 1, we replace only the ball joint, there are repair kits on the market The second possibility is sending the wishbone to a company for overhauling The third possibility is installing a new wishbone from Porsche Use some talcum powder when installing, or the Porsche will squeak of joy Installing the wishbone is hardly possible, it's necessary to pull the eccentric bolt down Here it's extremely narrow and it's easy to destroy the thread in the rear It's better to protect the thread with a sleeve, which allows also pulling it downwards The sleeve fits here perfectly If you are lucky the wishbone comes in place by some careful punches with the hammer If not, it's necessary to remove also the rubber mounts Mark the position Fortunately it's rather easy slackening these bolts Coat the eccentric bolt with grease and insert the eccentric bolt in the wishbone Enter the wishbone at the front mount and secure it by the bolt Here it's fine Install the rubber mount in the rear Bring the ball joint in the right orientation and insert it in the steering knuckle Pull the boot a little down and press the joint in the steering knuckle Like this it's fine Put the thick washer and a new lock nut here Be aware it's a 12 x 1.5 thread At the backside was the thin washer and of course we use a new locknut Press the joint upwards, otherwise the bolt won't enter When the joint is in the right position, the bolt enters rather easy And of course we use a new locknut Fasten the mount respecting the marks But to be honest, there is practically no play The adjustment is more to correct the differences in the chassis It fits perfectly Fix the caster eccentric, the nut in the rear wasn't loose We still conserved the old setup, take care not to lose it now when fastening the nut Let's continue here Good Fasten the clamping bolt I fasten all bolts by hand, then we'll use the torque wrench The bolt at the steering knuckle gets 50 Nm Let's try it with the 50 Nm, I have to apply the wrench once more and 50 Nm The bolt here gets 65 Nm Okay, and we have 65 Nm The nut a the rear gets surprisingly 85 Nm, I checked this twice Counter the eccentric bolt, it must remain at its old position And slowly it gets its 85 Nm We are near to 85 Nm - that's it The adjustment hasn't changed as you see at the mark The marks at the mount and the prints are aligned And the mark at the caster eccentric bolt fits, With the caster we'll not have headaches This would be more the case when replacing the whole front axis Fasten the mount with 46 Nm, once and twice 46 Nm When the wishbone is in, the stabilizer is next to mount, this you see in the other video When the stabilizer is in, don't forget the baffle plate It's mounted to the strut The correct torque for the small bolts would be 10 Nm Mount the wheel and we can go for a test spin with our new wishbone I say good bye until the next video