Hi,
I checked my discs with a vernier calipers on my 1997 C4S and read 29MM? I notice there is a lip
on the disc which may prevent me from measuring actual thickness ? Would a 97k mile car discs be worn at this stage ? do I need to use a Micrometer to measure same ?
Checking thst discs are within correct tolerance 993 C4S
Moderators: hot66, impmad2000, Barry, Viv_Surby, Derek, Mike Usiskin
-
- DDK 1st, 2nd and 3rd for me!
- Posts: 2181
- Joined: Fri Oct 15, 2010 7:31 am
- Location: Ireland
- Contact:
Checking thst discs are within correct tolerance 993 C4S
Rds,
Jasper
Email :denisamurphy@gmail.com
97 993C4S,64 356C,9112.7 RS clone,03Manthey K410 GT3,70 2.2 E,86 32 Coupe,66 230SL,70 E type 4.2,03BMW E46M3, 981 3.4S PDK, VW Touareg 3.0TDI..2 Scotties, 22 Aquador.
Jasper
Email :denisamurphy@gmail.com
97 993C4S,64 356C,9112.7 RS clone,03Manthey K410 GT3,70 2.2 E,86 32 Coupe,66 230SL,70 E type 4.2,03BMW E46M3, 981 3.4S PDK, VW Touareg 3.0TDI..2 Scotties, 22 Aquador.
-
- I need to get out more!
- Posts: 3277
- Joined: Mon Apr 26, 2004 7:51 am
- Location: Selby
Re: Checking thst discs are within correct tolerance 993 C4S
Replacing discs seems to be more of a regular service item these days, as opposed to the 'old days'.
Lipped or worn discs can be skimmed of course, providing there's enough 'meat' on the disc.
I think Porsche give minimum thicknesses to work to
Some workshops can skim insitu
Lipped or worn discs can be skimmed of course, providing there's enough 'meat' on the disc.
I think Porsche give minimum thicknesses to work to
Some workshops can skim insitu
Merc B Class diesel
Porsche-less
Porsche-less
-
- Me and DDK sitting in a tree! KISSING
- Posts: 2568
- Joined: Tue Oct 19, 2004 8:46 pm
- Location: Dorchester
Re: Checking thst discs are within correct tolerance 993 C4S
Hi , you do need to measure the worn area, the "lip" is approximately the original disc thickeness ( give or take) A micrometer is unlikely to have enough throat depth to allow proper measuremnet and will only give point readings ( which you could average to get a number). A vernier may have a relief at the bottom of the jaw throat to clear the lip or you should use a spacer of a known thickness each side of the disc the measure with a verier including the spacers then subtract the spacer thickness from the measured value to give your average disck thickness.
cheers
andy
cheers
andy
ddk member# 1527
Austin Healey 100/6, 1957 Fast Road ( now sold)
75 2.7 S backdated to "r" and very light (now sold).
Adria Camper
Buddy McCrae kneeboard.
Friar Tuck kneeboard.
Lots of Bicycles.
Austin Healey 100/6, 1957 Fast Road ( now sold)
75 2.7 S backdated to "r" and very light (now sold).
Adria Camper
Buddy McCrae kneeboard.
Friar Tuck kneeboard.
Lots of Bicycles.
- Nige
- Nurse, I think I need some assistance
- Posts: 6599
- Joined: Wed Nov 26, 2003 9:11 pm
- Location: Denby, Derbyshire
Re: Checking thst discs are within correct tolerance 993 C4S
If in doubt replace them, they generally don't cost that much especially when compared to pads. Also look out for cracks and warpage, if they're crusty and have more ridges than a packet of crinkle crisps then just swap.
At 97k I doubt they're the discs that it left the factory with, but this all depends on what previous owners braking habits are and if harder type of pads have been installed along the way.
At 97k I doubt they're the discs that it left the factory with, but this all depends on what previous owners braking habits are and if harder type of pads have been installed along the way.
-
- DDK 1st, 2nd and 3rd for me!
- Posts: 2181
- Joined: Fri Oct 15, 2010 7:31 am
- Location: Ireland
- Contact:
Re:Are my discs are within correct tolerance 1997 993 C4S ?
I checked the thickness on my discs with a Micrometer on 3 different points on each disc, I found the following :- 30MM Front right, 31MM Front left, 26MM Back right, 25MM Back left, I measured on the wear surface area in all cases.
Rds,
Jasper
Email :denisamurphy@gmail.com
97 993C4S,64 356C,9112.7 RS clone,03Manthey K410 GT3,70 2.2 E,86 32 Coupe,66 230SL,70 E type 4.2,03BMW E46M3, 981 3.4S PDK, VW Touareg 3.0TDI..2 Scotties, 22 Aquador.
Jasper
Email :denisamurphy@gmail.com
97 993C4S,64 356C,9112.7 RS clone,03Manthey K410 GT3,70 2.2 E,86 32 Coupe,66 230SL,70 E type 4.2,03BMW E46M3, 981 3.4S PDK, VW Touareg 3.0TDI..2 Scotties, 22 Aquador.