front brake slide pin side to side play tolerance?

[jimmyhackers]

Peugeot 306 GTI6. (lucas front brakes)

the front caliper carriers have 2 holes for the slide pins, they are ambidexterous (fit either side of car)

ive been through 3 sets, so 6 carrier now. (with new slide pins)

they all have less than 0.1mm play in the same respective hole on each carrier and the other hole has 0.5mm play. neither are ovaled out.

when the carriers are fitted, the oversized hole ends up on the top on one side and on the bottom on the opposite.

due to their ambidextrous nature....and all holes being the same tolerance, leads me to believe this play in one of the holes is by design.
to allow some float. or its a manufacturing defect, or im just really unlucky at ebay.

yet i cant find anything about it online, and the gti6/306/aussie frogs forums have no info.

the only article i could find about slide pin side play was for bmw brakes and it said expect 0.7mm play and anything near/above 1.5mm is bad.

would really like some brake guru to confirm this is by design......

thanks in advance
jim

[stevieturbo]

Is there some sort of problem you alone are having ? Or are you dreaming up a problem ?

[5s Alive]

I'd expect all four holes to be exactly the same dimensions assuming that the pins are all the same. On some cars two of the pins may either be solid but slightly different shapes or have cut-outs with rubber bushings.

[LivLL]

Some caliper carriers have slightly different hole sizes to allow for thermal expansion in use. So long as the pins are greased up nicely it shouldn't cause any knocking noises.

Have you checked a parts breakdown drawing also as some other makes I've come across have a slider with flats on in the tight tolerance hole and one without in the loose tolerance hole. It's to ensure a good grease path where the tolerance is tight and again some form of thermal expansion in the looser tolerance one. Also, some are by design this way so you only need to take off one slider bolt and rotate the caliper on the other one for pad changes.

Yours doesn't sound like a problem, more like a design choice.

[jimmyhackers]

car was sat in a scrap yard for over 10 years, many problems. most are fixed

i am on the niggles stages now, there was grumble from my front right, found a clunky caliper.....

watched a piggy power tutorial video about front brakes that didnt mention this play being normal, man lied about grease removing it.....so i thought my caliper carrier was fooked.

turns out its not, this play is factory spec (and i have spares carriers now : ( )

there is no mention of this anywhere in any technical documents or the haynes manual. bloody peugeot.

and the grumble wasnt my bearing or the brakes....bloody driveshaft joints :S