How to : Tierod replacement

By Steve


Tools needed:

Needle nose pliers

12mm wrench

17mm wrench (and a 17mm ratchet if preferred)

BFO hammer



2 x tierod ends

2 x castle nuts

2 x split/cotter pins

(the castle nuts + pins come with new tierods from


1)      Jack up one side of the car, put on jack stand and remove wheel.

2)      WD-40 the castle nut and tierod lock nut.

3)      Remove the old split pin from castle nut with needle nose pliers.

4)      Undo 17mm castle nut.


Upside down Castle nut

To remove the ball joint from the stub, put the castle nut back on upside down until its flush with the top of the ball joint shaft (this will stop the shaft from �mushrooming� when you hit it).Whack with BFO hammer both on the side of the stub and the top of the ball joint shaft until it pops (don�t be afraid to hit it). DSC01475

2)      Leave the ball joint shaft where it is(with the upside down castle nut in place) and put a 12mm spanner on the steering arm bracing it against the lower A-arm.

3)      Paint a mark with typex or similar on the lock nut + threads so you can line them up again later.

4)      Use the 17mm wrench to undo the tierod lock nut a half turn (turning against the braced 12mm wrench).

5)      Remove the upside down castle nut and spin off the tierod end (count the number of turns it takes to remove it).

If the ball joint shaft spins when removing the castle nut, pull off the rubber boot a little and clamp pliers on the shaft. DSC01476DSC01477


old vs new


Locknut loosened

Twist on the new tierod (the same number of turns).

7)      Push the shaft of the ball joint into the stub and finger tighten the castle nut on it.

8)      Rebrace the steering arm with the 12mm and retighten the 17mm lock nut (its also good to count the number of threads up to the locknut to ensure you�ve got it aligned correctly as well as using your paint marks).


9)      Tighten down the castle nut until the ball joint shaft seats correctly, if the castle nut doesn�t line up with the holes in the shaft for the split pin, tighten a little more.

10)  Insert and split the cotter/split pin.


11)  Refit wheel, remove jack stand and lower car.

12)  Do the other side ;-)



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