Quinton Hazell brake discs.is this a problem?

[TVR Beaver]

I got some QH discs for the back of the Griff and was goimg to fit them this weekend... But on picking the first one up I could not see any balancing marks on it so started to look further.. They are quite heavy discs so I would have expectec them to be balanced... but then I noticed the width of the disc each side.
as shown in the pic, one side is 5mm and the other side 7mm.. turn the disc 180 deg and they both measure about 6mm?
I'm sure this won't help with heat and expansion under heavy loads... will it expand more on the 7mm bit than the 5mm... basicaly giving a judder?



I'll call them Monday and see what they say... anyone else seen this sorth of thing??

[carsy]

I think i'd get them taken back. Cant be right that.

[NTEL]

Oh give over....get 'em fitted it'll be fine. The average of 5 to 7 is 6. It's only a road car...........

[leerdam23]

Nope, return em, brakes are not something to compromise, if they are not properly cast and machined there must be a reason, probably best not to find out when using them on the car.

[jojackson4]

They look like there fit for The scrapyard

[scotty_d]

leerdam23 said:

Nope, return em, brakes are not something to compromise, if they are not properly cast and machined there must be a reason, probably best not to find out when using them on the car.

This, its a high performance sports car, if it were mine I would like it to stop when needed.

[NTEL]

There is nowt wrong with QH......They will be balanced. Get 'em fitted and stop muckin' about.

[kev b]

I hear from friends in the trade that the quality of QH parts is not what it was. Another thing to consider is that there are a lot of counterfeit parts around.

[TVR Beaver]

Thoes are my thoughts. Are QH still quality stuff or could they be fake? See what they say

[jamieduff1981]

The casting has been machined off axis. There's no effing way those would be going on my car.

[gruffalo]

They look really badly made, no proper finishing at all.

[carsy]

The fact that the disc thickness varies at different points is a sure way to get brake judder. Get them returned.

[N7GTX]

1. At best a manufacturing defect.
2. At worst a Chinese copy in a QH box.

Is the other one the same? If it is okay then likely to be 1. If both the same a bad batch or copies.

QH was in administration a year ago. Just sayin'.....

[TVR Beaver]

The other one has the same defect.. just not as bad... maybe only 0.5mm

I've mailed them so see if I get a reply.. if not I'll call the buggers

[esso]

.......scrap.......!

[TVR Beaver]

well they are looking into it but the break person isn't in until Tuesday... They did mention going into admin last year, but say they are supported by the old manufacturers... and have requested more pic's / details of packing / bar codes etc.. so sounds like they are at least interested?
will see what tomorrow brings

[rigga]

Its fine, its due to the inner surface having less air flow over the disc to cool it, so its thicker to absorb the heat generated better.
















No not really its not right and shouldn't be fitted, how that got through qc ill never know

[TVR Beaver]

looks okay from the other side when rotated 180 deg.. maybe they only looked at it in one place as this sort of thing never happens... (obviously always the right place)

My mate works for a well known brake and vac pump company.. and they have just started dealing with a supplier in China (against my advice not to!)... And some of the stories he's now telling me on our Friday night's out is just as predicted ....

Like 'but if you measure it here, it’s okay'
and 'it will still work.. it is no problem'
and 'it was in tolerance when we sent it'
and 'we know it's not to drawing so can we change the drawing'
and 'the control limit is too tight so we don't use it'
and 'these are not like the samples but we are now in production'
and 'it should last until out of warrenty'
and 'our supplier was expensive so we found a better one'
and 'we can't keep up because we scrap too many parts'



etc etc... the list goes on... our lives in their hands

Edited by TVR Beaver on Monday 20th January 14:54

[330p4]

I have always used QH and it has been good quality but as you say they went into admin last year and supply has not been good since I suspect supply was a problem before this due to cash problems so there standards may have slipped at this time
Ian

[TVR Beaver]

I also wonder if towards the end, the started selling from their 'Scrap' pile to get some funds in... this is maybe what I have