Re: '87 5K CSQ brakes binding!

Almost certainly a failing master cylinder. A common occurence on Audis.

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Antony, Could be that you have a failing master cylinder. When the brakes seem to start to bind, put some cold water on the master cylinder and see if that makes the brakes release somewhat. Cheers! Steve Sears 1987 Audi 5kTQ 1980 Audi 5k 1962 and '64 Auto Union DKW Junior deLuxes (SPAM Blocker NOTE: Remove SHOES to reply)

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Yep, it starts that way. Unfortunately, the master cylinder is right in the way of the heat from the radiator. It'll start acting up in hot weather, and get worse from there - prolly because the aluminum casting expands and the worn seals lose some contact with the bore. That's why, if you pour cold water on the cylinder, it'll temporarily fix itself - enough to get you home in short hops. Someone on Audifans have tried putting a homemade heat shield (made from a pie tin or something) between the rad and the cylinder - but that fix only postponed the inevitable MC replacement. Cheers! Steve Sears 1987 Audi 5kTQ 1980 Audi 5k 1962 and '64 Auto Union DKW Junior deLuxes (SPAM Blocker NOTE: Remove SHOES to reply)

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I successfully used a sheet metal heat shield on my 1987 5000S, after the garrage replaced the brake master cylinder twice in vain. Plamen, Toronto

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