42 replies to this topic

[proyecton10]

We had 330 Nm on it and today we tighten it up again to 330 Nm and we can certify that it´s not a matter of tightening Still about 2-3mm of play Tomorrow we will be taking the flange and bearing out again in order to inspect the fitting, but we are hoping to hear from Steve at Zcars soon.

Thank you guys always a pleasure to read your advice!

[proyecton10]

Yesterday we took the entire suspension arm apart and investigated what could be causing the play we´ve been having since new on our RH rear wheel. We already stated it was not a tightening problem, but we did´t know which of the three parts involved was failing; the bearing housing on the arm, the bearing or the flange???

The bearing is brand new, but it could have been a manufacture failure. So we tested it as well. Note the car has only done a few 1000 meters.



we measure the gap between bearing and circlip (not really relevant) which was 0.4mm



next we inspected the bearing housing which was fine:


following was the inspection of the flange and although we could feel some imperfections we could not measure them:






As we couldn´t explain what could have caused this imperfection as it´s only on one side of the flange we took it to our materials teacher who stated the material had failed maybe because the machining could have taken the hardening treatment away...

Further on the bearing showed normal play when not pressed and absolutely no play when pressed, it was perfectly fine!

Finally we put everything back together step by step. So we made another experiment when the bearing was on the arm without the flange and pressed the bearing. Absolutely no play, everything OK.



Lastly we pressed the flange into the bearing and tested it again. Guess what.... the play was back! So problem still there BUT looks like we found who is causing it as everything is pointing to the machined flange.






Could someone please confirm us our assumptions are correct? Steve please take a look at this issue, we will contact you via email as well.

Thank you all

Edited by proyecton10, 24 November 2011 - 10:07 AM.

[Alburglar]

Looks like some bits of grit got in there or something??? Were there matching score marks on the bearing face?

[proyecton10]

Thanks Alburglar. Old bearing shows no wear on the inside faces and looks perfect. It really is a strange mark on the flange.... Other than the material failing as the professor said, we don´t know what else could it be. Still waiting for Steve to diagnose the problem.

Cheers guys

[proyecton10]

Good new, Steve at Zcars will be sending us a new flange soon, hopefully within this week. Hopefully this will solve our problems.

Thank you!!

[rustandoil]

Sorted?

[redj]

I have the same problem..... so what about the final solution . thanks

[proyecton10]

First, thanks to Steve for shipping the flange so quickly.

Do to some other problems with our brake lines we haven´t been able to roll the car and I´ll ask the guy in our team who was responsible for this problem to write up the process he did and the results.

Thanks and we will come back to you soon :)

[redj]

^{Im still waiting ..... thanks proyecton}

Edited by redj, 09 February 2012 - 12:06 AM.

[proyecton10]

Sorry for the long wait.... The truth is that after changing the flange there is still some play on one position of the wheel. This problem has taken us so much time that we´re now sorting out some other stuff (esthetics and now as well the diff). Only thing we can think of is buying a third bearing or a new drive shaft head, but both items have already been replaced. There is less play and you could probably go away with it but we are willing to sort it out.

Any new suggestions? HOw did you fix yours?

Thanks you

[redj]

I have not repaired. I'll do it soon ... maybe in the spring.
I practice snowmobiling on weekends and work the rest week.

thank you again

[proyecton10]

redj any news on your problem?



we are going to put in a third new bearing in this week as we´ve still to much play in one position as shown in the video below (hard to film the play but we tried...). If this doesn´t work we are really running out of possible solutions as we are not being able to track down the problem. There are few pieces involved:

- suspension arm bearing housing
- bearing (already tested two bearings)
- flange (already changed the flange)
- drive shaft cv (tested with two different units)

Anyway if anyone has come across a similar problem before please give us a tip. We will update you soon hopefully with a solution :)

Cheers

[R1mini]

I would personally get on the phone and tell them to send you a complete new arm, bearing, flange, CV unit that has been assembled to make sure it is perfect with no play, and while they are on, a new diff if that problem still exists. You have been struggling with this for a long time now, some of the parts supplied with these kits especially in the driveline are not new so go back to the supplier and tell them to fix it at there expense

Cheers
David