Red_Nic Posted December 19, 2015 Share Posted December 19, 2015 (edited) 2004 350z 112000 miles on the clock. I have just mot'd and it passed. I specifically asked for them to check what was causing the rattling /knocking sound I hear when going over little bumps/uneven roads. It sounds like it's coming from the front of the car. They couldn't find play in anything from suspension arms etc. because of the cars age /mileage, I changed front and rear anti roll bar links , but it hasn't stopped the rattling. I then replaced the front shock absorber struts, which also hasn't stopped the rattling. I took it back to the mot centre and they put my car on the mot testing ramp to aggressively shake it. You can't hear any rattling /knocking in the workshop. I can only hear the knocking when I'm driving around 20mph, over uneven road. The knocking sounds like the mot guys should be able to diagnose the cause, but we can't hear it in the workshop. It's been making this noise for over a year now, but it's just started to bug me. The sound is not getting worse. I owned this car since 2005 so I know it shouldn't rattle like this. Does anyone have any ideas what it could be please? Many thanks in advance. Edited December 19, 2015 by Red_Nic Quote Link to comment Share on other sites More sharing options...
flyboy Posted December 19, 2015 Share Posted December 19, 2015 100 % Bannana Arm V difficult to simulate when on the ramps. Quote Link to comment Share on other sites More sharing options...
-G- Posted December 19, 2015 Share Posted December 19, 2015 On the very odd occasion my coilovers need adjusting as they start ticking on roundabouts or knocking on uneven roads, it completely disappears once I've softened / hardened them using the control knobs. Not sure if you're on C/over or not, so only a suggestion. Quote Link to comment Share on other sites More sharing options...
allaboutthepasty Posted December 19, 2015 Share Posted December 19, 2015 As per flyboy, definitely banana arm. Had the symptoms, still flew through MOT, replaced the nearside and it was fine since. Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted December 19, 2015 Share Posted December 19, 2015 Lots of threads on the B A N A N A B A R ... just look it up ... will cost £250 per side plus fitting ... don't go for cheapos ... 1 Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted December 19, 2015 Share Posted December 19, 2015 http://www.350z-uk.com/topic/102024-banana-arm-bushes-or-the-works/page__hl__compression#entry1533670 Quote Link to comment Share on other sites More sharing options...
flyboy Posted December 19, 2015 Share Posted December 19, 2015 clarke motorsport do the nissan replacement bushes at a fraction of the price of new arms. Just get your local garage to press them in. Quote Link to comment Share on other sites More sharing options...
gillywig2 Posted December 19, 2015 Share Posted December 19, 2015 Lower control arm bush can also be a source of knocking. See how the strut is off centre in the arm, due to a worn bush. Quote Link to comment Share on other sites More sharing options...
ZEUS Posted December 19, 2015 Share Posted December 19, 2015 I'd bet on the banana arm too. Quote Link to comment Share on other sites More sharing options...
flyboy Posted December 19, 2015 Share Posted December 19, 2015 Lower control arm bush can also be a source of knocking. See how the strut is off centre in the arm, due to a worn bush. Easy spot for the MOT tester though Moves/Knocks when on the ramps with the pry bar Quote Link to comment Share on other sites More sharing options...
Zeezeebaba Posted December 20, 2015 Share Posted December 20, 2015 My knocking issue was bannana arms and the droplinks were also replaced as a precaution. The noise cant be simulated in the workshop either. Quote Link to comment Share on other sites More sharing options...
Lurch Posted December 20, 2015 Share Posted December 20, 2015 Only thing I would mention is I had this. Bought the kit for it and took it to the garage. They had a look and it wasn't that it was steering column nuckle joint that was causing the issue. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
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