Steering: - 4-wheel alignment refused: rusted rear eccentric screws

ca2n · Jun 18th, 2020, 15:38

Hello all,

As per title, I went to a local wheel alignment shop hoping to get the alignment done on my XC90.

After setting everything up, the tester noted the rusted rear eccentric screws and explained that he could not proceed with the screws in such a condition for fear of breaking something that's potentially seized in the assembly.

He advised replacing them before coming back for another go.

Having checked VIDA, the part numbers appear to be:
Eccentric screw 986931
Eccentric washer 31201493
Flange lock nut 985870

Does anybody have any experience replacing these items? Could it potentially be DIY'd? Or would some generous penetrating fluid and a wire brush be able to loosen it enough?

Many thanks and stay safe.

Stephen2015 · Jun 18th, 2020, 18:11

I would wire brush the threads all around the nuts cleaning away the rust, right size sockets and ring spanners put some plus gas or wd40 if they won't crack apply some heat on the nut not for to long then try again.

Would wear gloves and take your time.

Tony500 · Jun 20th, 2020, 19:14

Taking the nut off looks easy enough... If if the bolt has seized in the bush.... Might have to get a set of new bushes too. If so if you can get the Polly set up.

oragex · Jun 21st, 2020, 20:16

Usually Volvo is using coated bolts on the rear suspension. As above, I would try cleaning it a little, then bring it to another place

Jun 18th, 2020, 15:38	#1
ca2n Member Last Online: May 18th, 2024 22:19 Join Date: Dec 2018 Location: West Midlands	4-wheel alignment refused: rusted rear eccentric screws Hello all, As per title, I went to a local wheel alignment shop hoping to get the alignment done on my XC90. After setting everything up, the tester noted the rusted rear eccentric screws and explained that he could not proceed with the screws in such a condition for fear of breaking something that's potentially seized in the assembly. He advised replacing them before coming back for another go. Having checked VIDA, the part numbers appear to be: Eccentric screw 986931 Eccentric washer 31201493 Flange lock nut 985870 Does anybody have any experience replacing these items? Could it potentially be DIY'd? Or would some generous penetrating fluid and a wire brush be able to loosen it enough? Many thanks and stay safe.

Jun 20th, 2020, 19:14	#3
Tony500 Master Member Last Online: Jan 7th, 2024 14:02 Join Date: May 2014 Location: Glasgow	Taking the nut off looks easy enough... If if the bolt has seized in the bush.... Might have to get a set of new bushes too. If so if you can get the Polly set up. __________________ 2009 V70 R-Design 2.0D SE Sport 2007 XC90 D5 SE Lux 2006 XC90 V8 Executive

Jun 21st, 2020, 20:16	#4
oragex Premier Member Last Online: Jul 26th, 2021 21:24 Join Date: Jun 2013 Location: Coldnada	Usually Volvo is using coated bolts on the rear suspension. As above, I would try cleaning it a little, then bring it to another place __________________ Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c

Jun 18th, 2020, 18:11	#2
Stephen2015 S60 D5244T4 Last Online: Jul 26th, 2023 17:31 Join Date: Apr 2015 Location: Norwich	I would wire brush the threads all around the nuts cleaning away the rust, right size sockets and ring spanners put some plus gas or wd40 if they won't crack apply some heat on the nut not for to long then try again. Would wear gloves and take your time.

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