MOT advisory question ( front discs)

galloot633 · Jul 13th, 2018, 19:57

Can someone give me some advise over an mot advisory , last mot I received this for both front discs " Nearside Front brake disc worn, pitted or scored, but not seriously weakened (3.5.1i) " the tester explained at the time my discs had a wear lip, today Ive taken a look at them to see which size is fitted to my car, but to me they look fine , there is a 1 mm lip on both sides of the disc , the disc is still 25 mm thick , does this really deserve an advisory and should I look at changing them ?
thanks Dave

AndyV7o · Jul 13th, 2018, 20:01

If the disc is within thickness range, its fine. He's being a bit overzealous.
Get a coarse file, or die/angle grinder and remove the lip, or most of it.
Sorted!

galloot633 · Jul 13th, 2018, 21:07

my thoughts exactly ! , but looking at previous posts, some suggest the wear limit is 1mm per disc side and as a new disc is 28 mm, replacement should be at 26 mm
thanks Dave

AndyV7o · Jul 13th, 2018, 21:20

Hence 'if measurement is within range' find out what the range actually is. Its usually 2-3.5mm from original thickness on a chunky vented.
If they're 28mm new then yeah, its ready for a pair!

Jul 13th, 2018, 19:57	#1
galloot633 xc90, volvo number five Last Online: Today 14:32 Join Date: Dec 2005 Location: Grappenhall	MOT advisory question ( front discs) Can someone give me some advise over an mot advisory , last mot I received this for both front discs " Nearside Front brake disc worn, pitted or scored, but not seriously weakened (3.5.1i) " the tester explained at the time my discs had a wear lip, today Ive taken a look at them to see which size is fitted to my car, but to me they look fine , there is a 1 mm lip on both sides of the disc , the disc is still 25 mm thick , does this really deserve an advisory and should I look at changing them ? thanks Dave

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Jul 13th, 2018, 20:01	#2
AndyV7o Premier Member Last Online: Jun 21st, 2021 20:47 Join Date: Jun 2018 Location: Creswell	If the disc is within thickness range, its fine. He's being a bit overzealous. Get a coarse file, or die/angle grinder and remove the lip, or most of it. Sorted!

Jul 13th, 2018, 21:07	#3
galloot633 xc90, volvo number five Last Online: Today 14:32 Join Date: Dec 2005 Location: Grappenhall	my thoughts exactly ! , but looking at previous posts, some suggest the wear limit is 1mm per disc side and as a new disc is 28 mm, replacement should be at 26 mm thanks Dave

Jul 13th, 2018, 21:20	#4
AndyV7o Premier Member Last Online: Jun 21st, 2021 20:47 Join Date: Jun 2018 Location: Creswell	Hence 'if measurement is within range' find out what the range actually is. Its usually 2-3.5mm from original thickness on a chunky vented. If they're 28mm new then yeah, its ready for a pair!

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