General mot failure again

[bravobravo]

my car when for its mot today and failed once again :bang: these are the reasons why (need some help dont get it at all)

nearside front tyre is incorrect because tyres with different aspect ratios are fitted on the same axel ** dangerous**

offside front tyre is incorrect because tyres with different aspect ratios are fitted on same axel ** dangerous**

near side front(drive shaft nut) front suspension locking device ineffective

offside (drive shaft nut) front suspension locking device ineffective

dont get what they are on about

help please

 

[bandido41]

I think what they are trying to say is that you have to have the same sort of tyre on the same axle as for the locking nuts on the driveshafts, you will need to get 2 new nuts to replace them, probably because they are not locking onto the driveshaft and therefore could come off with the vibrations of the vehicle.

 

[blue80sx]

basically you have odd tyres on it, one is a different size to the rest. As far as the nuts, someone must have undone the front axle nuts (eg if the CV joint was changed or similar) and each time that nut is undone it should be replaced with a new one and staked. Sounds like the old one has been reused or its not staked. Staked is where there is a groove on the axle and the neck of the nut is hit with a chisel so it deforms into the groove, helps stop the nut from coming undone and the wheel does not drop off.

 

[bravobravo]

right ok il get the wheel sorted where could i get the nuts from?

 

[Helz]

Join the club

Are you going to attempt it yourself? Might just be worth getting place the MOTed it to replace nuts for you

 

[bravobravo]

why are they a pain in the arse to do?

 

[bridges]

As above, the left and right tyre must be of the same size. Otherwise the car will not behave correctly.

Eg.... if you have a 185/60/14 on the drivers front you cant have a 195/60/14 on the passengers front. They must be the same.


It does not matter if your drive shaft hub nut is new all though as put above, it is very good practice to change them if worked on. I doubt this is why it has been highlighted.
The reason is because the Nut is not tightening properly. The testers would have detected play in the hub and found the nut ineffective. basically there is play. Order yourself 2x drive shaft nuts from a motor factors/garage.

 

[bridges]

Join the club

Are you going to attempt it yourself? Might just be worth getting place the MOTed it to replace nuts for you

:yeahthat:

because they can be tight so you will need a power bar and then a torque wrench to do them up again to the right torque.

 

[bravobravo]

i aint got that kind of equipment so i get the garage to do it

 

[jug]

hub nuts are a couple of quid each at a motorfactor, you should be able to do it with a 1/2" drive ratchet if you're a big lad.

 

[blue80sx]

problem is going to be measuring the torque, a torque wrench to the values needed (about 200 lb/ft??) would be very expensive just to do up two nuts accurately. Just get the garage to do it, should not take them 5 mins for each one.

HTH

 

[jug]

bollix to that, you dont need a torque wrench, they are locked in position once you hammer the collar down so they wont come loose. i've got a torque wrench and i dont even use it for things like this, there's really no need, as long as they are tight enough so that there is no play in the bearing they're fine.

 

[bridges]

bollix to that, you dont need a torque wrench, they are locked in position once you hammer the collar down so they wont come loose. i've got a torque wrench and i dont even use it for things like this, there's really no need, as long as they are tight enough so that there is no play in the bearing they're fine.

In fairness neither do I, a good amount of effort on the power bar sorts them out.

The reason I suggested the garage was incase the nuts had slipped their threads and possible complications. However there is no reason why they shouldnt come off, by undoing them with the road wheel on and on the road, once any hub cap has been removed. I would suggest a bar rather than ratchet though as if tight they might damage the ratchet. This is always a good investment for a tool box