Machining Rotors

[old mans ute]

Looking for some rotor specs on VZ S Ute please

Original thickness

Minimum thicness before replacement

Approx how many times are discs machines before replacement is required.

I realise this can be a variable due to amount of maching needed to true the discs and the degree of warp but just looking for guidelines.

[Troy711]

you need/got yours machined too? i had mine done at 15K cos i had brake shudder

[old mans ute]

I was not all that happy with the brake shudder and any premature machining of discs obviously reduces the service life of the discs. Dealer has approached Holden on my behalf for replacement rotors.

[Holden_Mechanic]

holden wont replace them.

[Troy711]

yea, holden are 'naughty C words'. i wanted new ones but was told they wont give em to me

[Westie2148]

You can download the Disc Brakes Australia catolouge. It has all the disc specs for every car in it. http://www.dba.com.au/catalogue/pdf/...00_9072003.pdf As for how many times a disc can be machined, well that all depends on how much they have to take off each time to get the discs running true.

[old mans ute]

Originally Posted by Westie2148

You can download the Disc Brakes Australia catolouge. It has all the disc specs for every car in it. http://www.dba.com.au/catalogue/pdf/...00_9072003.pdf As for how many times a disc can be machined, well that all depends on how much they have to take off each time to get the discs running true.

Thank you. However DBA catalogue runs out at VY but if things are consistent thre is 2-3mm to play with between new disc rotors and time for replacement.

So I would expect that one oe maybe two machining episodes would see rotors need replacing. Either way I don't see why I should have my rotor life being shortened by someting that GM admits to under warranty .. even if they will only remedy by machining and not replacement.

Haven't heard back from dealer on the replacement claim (which he recommended by the way). If I don't get satisfaction on this one I'm off to consumer affairs.

Just as an aside, my daughter who knows very little about cars, drives a 1997 Toyota Corolla (Australian assembled) she has had since new, and had nothing but regular service and one tail light globe replaced in 135,000 km were discussing cars and warranty issues with Holdens. She plainly stated " Everyone who buys a Holden or a Ford expects problems. They are just crap cars"

And I thought she knew little about cars.

[SMOKN_LJ]

Front rotors have original thickness around 28mm and minimum thickness is 25mm rears have original thickness around 16mm and minimum is 13.9mm, holden will only replace them if car has had brake shudder twice, when machining it only takes off a fraction of a mm about 0.1mm and commodore rotors don't wear fast.

[darren71]

My ss ute had the front rotors replaced ,although my mate whos the service manager had to lean on gmh a fair bit to get them.Also the backs have been machined 3 weeks ago and are rooted ,so ill be back to them this week looking for replacements.Mate told me if the vehicles done over 60,00kms they wont even look at you.Also ive owned 3 ss utes and an Adventra and they all had front discs replaced.Dunno whether its my driving but im not real happy.

[Troy711]

brakes are covered up to 60K. anything above and beyond is considered normal wear and tear

[old mans ute]

Taken from Feb 1 till today for it to happen but my front rotors were replaced today under warranty. 29K when I complained, 38K today. New brake pads as well obviously.

Hope this lot doesn't warp and my problem was unusual. Will be nice to the brakes for a few days before I see if it has corrected the shudder under medium to heavy downhill braking.

[improvize]

Apparently brake shudder has been a problem since the VB!!! Anyway, I went to a Brake place and got four new brake discs, calipers and sets of pads.

WAY better brakes now. So much better feel and so smooth! One of the most important parts of a car in my opinion so I didn't want so scrimp on them when I started to get shudder from the factory setup.

And no way was I going to drive a car with machined brake discs.

[Holden_Mechanic]

i have just found out that really if the dealer wanted, they can replace it under warranty immidiatly, its just that come audit time they (the dealer) will be forced to pay for the rotors.

[old mans ute]

Well its on again. 67000kms and the brake shudder is back worse than ever. Dealers says Holden policy not to cover under warranty after 60000km. My argument is First set I complained at 29000km and had them replaced at 38000km. Now at 67000km exactly 29000kms after replacement. I have the same problem so there is no 60000km wear and tear on my 29000lm old rotors. Dealer is taking up with Holden but not optimistic. I am determined to win this one and will keep all posted