Track rod end

Car Mechanics (UK) - - Help! -

At the last MOT for my 1998 Mercedes-benz C180, the front sway bar bushes and tie rod ends were deemed to be ex­ces­sively worn, so I thought I’d change them my­self. The bushes went in with­out a prob­lem, but the tie rod ends were prob­lem­atic. Af­ter fit­ting them, I be­gan to tighten the pin lock­ing nut and it felt like it stripped as soon as it be­gan to tighten. I was very del­i­cate tight­en­ing the se­cond one, but it too be­gan to slip. I took them off to in­spect the dam­age and they were in fact stripped.

I re­placed them with the old nuts be­cause that was all I had at the time; they were still stronger than the new ones. When I pur­chased some new ny­lon lock nuts, the thread was dif­fer­ent and they would not screw on. Can you tell me if they re­quire a spe­cial lock­ing nut? Carter Hil­ton The thread used on var­i­ous steer­ing com­po­nents can vary and this is nor­mally why new nuts are sup­plied to en­sure com­pat­i­bil­ity. As the sup­plied nuts both failed, it sug­gests a fault in their man­u­fac­tur­ing and I would re­turn them to the sup­plier, who should re­place the faulty com­po­nents, es­pe­cially given that these are steer­ing com­po­nents and safety-re­lated items. From your de­scrip­tion, the re­place­ment nuts you have pur­chased ap­pear to have a dif­fer­ent thread, and un­less you pur­chased gen­uine parts, it is not pos­si­ble to know the pitch of the thread used by the man­u­fac­turer – very of­ten, a fine pitch is used. To sum­marise, the nut is not spe­cial, but it does need to have the right thread.

A C-class track rod end.

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