Muddy Posted September 22, 2009 Share Posted September 22, 2009 Hard to believe that I've almost had the car 1 year. Car is up for MOT and it's booked in for Thursday. I'm petrified as normal as I like to wrap it in cotton wool and don't like the idea of oily mechanics putting their hands all over it. Just one question really: Does the 350z go on the brake rollers or does it have to go on a road brake test because of the rear diff? Just a bit worried about it going on the rollers and knackering the bodykit up? They have just recently fitted a small speed bump into their garage so will have to take some wood with me too. Cheers Craig Quote Link to comment Share on other sites More sharing options...
Ian Posted September 22, 2009 Share Posted September 22, 2009 It goes on a road brake test Quote Link to comment Share on other sites More sharing options...
Renegade Posted September 22, 2009 Share Posted September 22, 2009 Mine went on the rollers. They reckoned it was OK because it was not 4x4. I have never had a rear wheel drive car have to do a road brake test. Quote Link to comment Share on other sites More sharing options...
choptop Posted September 22, 2009 Share Posted September 22, 2009 Make sure you take your prize and joy to an MOT station with the right gear. I will let you into a secret though. When they came off the end of the prodution line in Japan the car was put on a complete rolling road, brakes, lights,indicators etc etc checked and then floored. Hardly what you would expect but there you go With this in mind makes the MOT station's Tests look totally harmless. Quote Link to comment Share on other sites More sharing options...
Chris`I Posted September 22, 2009 Share Posted September 22, 2009 Should be a road brake test Craig. Sure it says somewhere in the user manual Quote Link to comment Share on other sites More sharing options...
Ian Posted September 22, 2009 Share Posted September 22, 2009 Should be a road brake test Craig. Sure it says somewhere in the user manual It should also be on the testers screen at the start of the test Quote Link to comment Share on other sites More sharing options...
rtbiscuit Posted September 22, 2009 Share Posted September 22, 2009 wasn't when i did mine, when i got back next year i'll remind them not to put it on that machine again Quote Link to comment Share on other sites More sharing options...
Martin W Posted September 22, 2009 Share Posted September 22, 2009 Ive seen this comment many a time But never understood why its an issue Quote Link to comment Share on other sites More sharing options...
Arkwright Posted September 22, 2009 Share Posted September 22, 2009 tell your tester you don't want him to work the controls or drive the car. I take my vehicles to the same garage for mot and no one gets in except me. No problems from the tester, I just do what he asks and it works fine. Quote Link to comment Share on other sites More sharing options...
sunset350z Posted September 22, 2009 Share Posted September 22, 2009 I told them to give mine a road brake test, he was more than willing to oblige Better safe than sorry. Quote Link to comment Share on other sites More sharing options...
Chris`I Posted September 22, 2009 Share Posted September 22, 2009 I'll let you know for sure tomorrow. Mines going in for one. If it comes back with them complaining it kept stalling, they did it on the road - and didnt realise I had a lightweight flywheel Quote Link to comment Share on other sites More sharing options...
Muddy Posted September 22, 2009 Author Share Posted September 22, 2009 Thanks for the comments guys. Thought as much that it had a road test, I could be wrong but I think it has a limited slip diff which shouldn't be put on rollers like the brake test rollers. Will insist that they road test it Oh, and yes I do all the controls normally, don't think they'd fit in the brides anyway Quote Link to comment Share on other sites More sharing options...
M13KYF Posted September 23, 2009 Share Posted September 23, 2009 Ive seen this comment many a time But never understood why its an issue I believe its to do with the LSD Quote Link to comment Share on other sites More sharing options...
Chesterfield Posted September 23, 2009 Share Posted September 23, 2009 Correct - the LSD is the issue, if one wheel is fixed and the other rotated quite a bit, it will try to wind the driveshaft using the diff. Not good. Decelerometer should be used on a road brake test. Quote Link to comment Share on other sites More sharing options...
200sx Posted September 23, 2009 Share Posted September 23, 2009 I have never quite understood why I roller brake test should not be performed. People say it will wind the diff up (not sure exactly what this means), but why is this diiferent to a road test. One wheel locked up while the other is turning I would say is more likely to happen on the road. But won't the ABS stop this from happening any way? Quote Link to comment Share on other sites More sharing options...
rtbiscuit Posted September 23, 2009 Share Posted September 23, 2009 I have never quite understood why I roller brake test should not be performed.People say it will wind the diff up (not sure exactly what this means), but why is this diiferent to a road test. One wheel locked up while the other is turning I would say is more likely to happen on the road. But won't the ABS stop this from happening any way? forces aren't designed to go that direction through the LSD Quote Link to comment Share on other sites More sharing options...
200sx Posted September 23, 2009 Share Posted September 23, 2009 Ok so with a roller test the wheels will apply a force to the drive shaft and with a road test the drive shafts will apply a force to the wheels. But what does winding the diff up actually mean? Quote Link to comment Share on other sites More sharing options...
Chris`I Posted September 23, 2009 Share Posted September 23, 2009 Definately an on the road test guys. And the Zed should be towed with the rear wheels off the ground too as with them down it can damage the diff too I think. Applies forces to the diff it isnt desgned to take, it doesnt expect one wheel to be stationary when the other is turning Quote Link to comment Share on other sites More sharing options...
BulletMagnet Posted September 23, 2009 Share Posted September 23, 2009 My local MOT testers always ask if the vehicle being tested has LSD of not, if it has, then road brake test it is, only non-LSD vehicles should be on the rolling brake tester. Quote Link to comment Share on other sites More sharing options...
Muddy Posted September 24, 2009 Author Share Posted September 24, 2009 Well got back from MOT. It was the first time they've seen my car, but they have MOT'd my previous show cars. As soon as they saw it they said it wasn't going on the brake rollers because it's that low. Plus I told them about the LSD and he said road test no doubt. Think he was looking forward to the ride out Had problem getting in as the entrance to their garage is on a decline, and we found I was too low and would damage front bumper getting in. First thought I'd have to find somewhere else to get it done, but gaffer got some old pieces of kitchen doors and stuck them down. Car got into the garage with mm's to spare No problems with car, I didn't think there would be seeing that 80% of the car is new Just worry like hell when taking my show cars to MOT/garage's for the damage that my occur and the hassle it causes. But that's it for another year. Just got to get through the next service now and find someone with a ramp I can get on. Thanks for all the help guys. Hopefully this thread has helped a few members out too. Quote Link to comment Share on other sites More sharing options...
BulletMagnet Posted September 24, 2009 Share Posted September 24, 2009 Good stuff! Yeah, my local testers love to take my car out, usually accompanied with the comment "Make sure your window is down so you can see where you are going when sideways..." Quote Link to comment Share on other sites More sharing options...
Chris`I Posted September 24, 2009 Share Posted September 24, 2009 Mine passed too Second time through with a cleared out fog light and red LED bulb, so for those that worry like me, its fine. And I dont think they stalled it with the lightweight flywheel after I warned them about it Quote Link to comment Share on other sites More sharing options...
Muddy Posted September 24, 2009 Author Share Posted September 24, 2009 Mine passed too Second time through with a cleared out fog light and red LED bulb, so for those that worry like me, its fine. And I dont think they stalled it with the lightweight flywheel after I warned them about it He did mention to me that my fog light wasn't very bright, I just replied "I don't think they are on 350Z'ds" Quote Link to comment Share on other sites More sharing options...
steve3000 Posted September 24, 2009 Share Posted September 24, 2009 Mine passed too Second time through with a cleared out fog light and red LED bulb, so for those that worry like me, its fine. And I dont think they stalled it with the lightweight flywheel after I warned them about it Excellent! Mine passed today too - it's nice to have a 100% reliable 6 year old car... And they were perfectly happy with my LED fog light too Steve Quote Link to comment Share on other sites More sharing options...
Chris`I Posted September 25, 2009 Share Posted September 25, 2009 Mine passed too Second time through with a cleared out fog light and red LED bulb, so for those that worry like me, its fine. And I dont think they stalled it with the lightweight flywheel after I warned them about it He did mention to me that my fog light wasn't very bright, I just replied "I don't think they are on 350Z'ds" Do you have one of these? http://cgi.ebay.co.uk/2pcs-7440-7443-T2 ... 286.c0.m14 Took me a few bulbs to find this one that me and my mate thought would be bright enough to pass. Was cacking it the first time around Quote Link to comment Share on other sites More sharing options...
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