MOT brake roller question
#1
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MOT brake roller question
I have searched on this but can't find this specific info, and am now panicking.
I had an MOT last week and to be honest I think the tester was a bit clueless.
He insisted that the newage impreza WRX is differnt from the 'older' ones (mines a 2007 hawkeye) does not have traditional permanent 4x4 and will be fine on 2 wheel rollers. He tested the front and the backs separately on the rollers...
Now - I have been reading about LSD damage etc. and would like to get an idea of whether he is talkiing nonsense or not. Is it safe to test the brakes on a 2007 Hawkeye in this way (or in fact legal as per VOSA requirements)?
How likely is it that damage has been done and what's the best way to test for any damage?
Obviously the test was very short, just a few revolutions to test the footbrake and handbrake.
Fingers crossed...
Thanks
I had an MOT last week and to be honest I think the tester was a bit clueless.
He insisted that the newage impreza WRX is differnt from the 'older' ones (mines a 2007 hawkeye) does not have traditional permanent 4x4 and will be fine on 2 wheel rollers. He tested the front and the backs separately on the rollers...
Now - I have been reading about LSD damage etc. and would like to get an idea of whether he is talkiing nonsense or not. Is it safe to test the brakes on a 2007 Hawkeye in this way (or in fact legal as per VOSA requirements)?
How likely is it that damage has been done and what's the best way to test for any damage?
Obviously the test was very short, just a few revolutions to test the footbrake and handbrake.
Fingers crossed...
Thanks
#2
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I always make sure my car doesn't go on the rollers , and a tapley meter is used with me driving , heard the rollers can wind up the centre diff or something , on my mot centres website it says all 4x4 should be tested on road with the tapley meter
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Also if you have had a problem with the MOT as a result of this you only have a finite time to dispute the test results.....from memory its 30 days I think but I could be wrong.
Also if you have had a problem with the MOT as a result of this you only have a finite time to dispute the test results.....from memory its 30 days I think but I could be wrong.
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Had no issues and passed.
Thanks for the posts. Thought as much. Grrr.
They also adjusted the headlights so high they lit up the trees on my way from work - but I am currently taking them to task over that...
So - what's the likelihood of any damage being done on a low mileage car like this for the limited time it was in the rollers?
I know it's not ideal, but is it realy likely to have lunched the LSD?!
As several previous discusions have pointed out, surely handbrake turns, snow driving etc does something very similar?
Thanks for the posts. Thought as much. Grrr.
They also adjusted the headlights so high they lit up the trees on my way from work - but I am currently taking them to task over that...
So - what's the likelihood of any damage being done on a low mileage car like this for the limited time it was in the rollers?
I know it's not ideal, but is it realy likely to have lunched the LSD?!
As several previous discusions have pointed out, surely handbrake turns, snow driving etc does something very similar?
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If the rollers were only for 2 wheels then IT SHOULD NOT BE MOT'd on the rollers. Make it known to the garage that you saw them do it, and that they have tested the vehicle incorrectly which could cause damge to the rear diff, front diff or transmission. They know that it should be done with a tapley metre - it's in their basic training!
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But on further searching this reassures me somewhat:
https://www.scoobynet.com/scoobynet-...rake-test.html
Sounds like a polarising discussion.
https://www.scoobynet.com/scoobynet-...rake-test.html
Sounds like a polarising discussion.
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Wil be calling VOSA on Monday. Also to follow up on their headlight adjustment technique...
I took the car to another testing station today and they had to wind the headlights WAY down. They said thay had never seen lights set so high.
I took the car to another testing station today and they had to wind the headlights WAY down. They said thay had never seen lights set so high.
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The diffs etc are still being turned by the wheels rotation. i.e the wheel is turned which rotates the driveshaft,diff,prop and centre diff.
I dont know what equipment is being used in N.I. It obviosly far better thsn anything we have on the mainland as its basic knowledge here that anything 4wd doesnt go on a 2wd brake roller tester.
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More here:
https://www.scoobynet.com/929112-mot...r-drive-2.html
I'm still in a dilemma as my MoT is tomorrow and the garage only have 2WD rollers, but I'm reassured by Alan Jeffery's posts in the above link.
https://www.scoobynet.com/929112-mot...r-drive-2.html
I'm still in a dilemma as my MoT is tomorrow and the garage only have 2WD rollers, but I'm reassured by Alan Jeffery's posts in the above link.
#27
As most of the posts above, permanent 4wd vehicles are excluded from the standard single axle brake test. My mate does mot's at his garage and Never puts my scoob on the rollers.
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I dont see what being in neutral has do do with it?
The diffs etc are still being turned by the wheels rotation. i.e the wheel is turned which rotates the driveshaft,diff,prop and centre diff.
I dont know what equipment is being used in N.I. It obviosly far better thsn anything we have on the mainland as its basic knowledge here that anything 4wd doesnt go on a 2wd brake roller tester.
The diffs etc are still being turned by the wheels rotation. i.e the wheel is turned which rotates the driveshaft,diff,prop and centre diff.
I dont know what equipment is being used in N.I. It obviosly far better thsn anything we have on the mainland as its basic knowledge here that anything 4wd doesnt go on a 2wd brake roller tester.
only way i could possibly explain it is if you ever built/had 4wd tamiya remote control buggys as a kid you'd understand the principle more lol
watch at 1.30 where he rotates each axle without effecting the other axle. the same principals apply
Last edited by Gambit; 30 September 2013 at 10:04 AM.
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I had the MoT done today on my Blob. The tester took one look and said 'that's permanent 4WD, we'll have to use the decelerometer, it can't go on the rollers'.
That's what I was hoping for, and it passed the MoT too.
That's what I was hoping for, and it passed the MoT too.