Brack disc thickness - Pug 306, 1998, 1.4 petrol

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David Hearn - 04 May 2007 17:38 GMT

The car is a Peugeot 306 1998, 1.4l petrol. It has solid front discs
with (if I remember correctly) Bosch calipers (the one where you remove
1 bolt and it rotates upwards to reveal the pads)

I checked the front pads and discs last weekend and planned on changing
the pads this weekend, but I just wanted to check whether the discs need
changing too.

I don't have a micrometer to measure the actual thickness of the faces,
but I did measure the thickness of the rusty edge lip. This was 13mm.
And it appears that I have a 1mm lip each side, thus I'm estimating that
the disc is approximately 11mm thick at present.

Looking at Haynes it says:

Disc thickness:
    New:
        Solid disc:    10.0mm
    Minimum thickness
        Solid disc:    8.0mm

None of these seem to fit with a 11mm (used) disc. Plus, they make no
reference to Bosch calipers - just ATE, Bendix and others I think.

So, can anyone provide the original thickness and minimum thickness for
this setup?

Thanks

David

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Duncan Wood - 04 May 2007 18:08 GMT

> The car is a Peugeot 306 1998, 1.4l petrol. It has solid front discs
> with (if I remember correctly) Bosch calipers (the one where you remove
[quoted text clipped - 26 lines]
>
> David

You have now succesfully demonstrated that the rusty bits irrelevant :-)
Digital calipers are £12.50 in woolworths or about £8 on ebay & they're
quite usefull things in the toolbox

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David Hearn - 04 May 2007 18:32 GMT

>> The car is a Peugeot 306 1998, 1.4l petrol. It has solid front discs
>> with (if I remember correctly) Bosch calipers (the one where you
[quoted text clipped - 30 lines]
> Digital calipers are £12.50 in woolworths or about £8 on ebay & they're
> quite usefull things in the toolbox

True about the price - however I can successfully measure the rusty bits
at 13mm. A simple ruler on the side shows it's 13mm. I can also see
that the lip is, approx, no more than 1mm on each side, thus the disc is
approx 11mm in thickness.

I'm not saying that I'm accurately measuring the disc to be 11mm, but
that it appears to be (give or take a mm) about 11mm thick, certainly in
excess of the 10mm which Haynes says is a brand new disc. And for a
disc which is a couple of years old I would have expected it to have
worn a bit.

I just wondered whether there were different discs used with different
caliper setups, and whether I had a thicker disc.

Having a micrometer would only mean I could measure the thickness - if I
don't know what the minimum or brand new thicknesses are, then it's a
bit pointless. ;)

D

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Nigel - 04 May 2007 20:17 GMT

>The car is a Peugeot 306 1998, 1.4l petrol. It has solid front discs
>with (if I remember correctly) Bosch calipers (the one where you remove
[quoted text clipped - 26 lines]
>
>David

This from the Peugeot site. Max thickness 13mm. Min thickness 11mm.
Diameter 247mm

That's for 306 with solid discs from Vin 32000001.

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David Hearn - 04 May 2007 23:05 GMT

>> The car is a Peugeot 306 1998, 1.4l petrol. It has solid front discs
>> with (if I remember correctly) Bosch calipers (the one where you remove
[quoted text clipped - 30 lines]
>
> That's for 306 with solid discs from Vin 32000001.

Excellent - that's just what I'm after. Just checked the VIN and it
ends in 325xxxxx and the 13mm outer I measured seems right. Looks like
I'll pick up some discs tomorrow. Thanks again.

David

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