? grand cherokee brake master cylinder upgrade

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Jan 25, 2011 | 08:18 PM

87MJ

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Joined: Jan 2011

Posts: 2

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From: dunbar

Year: 1987

Model: Cherokee

Engine: 2.5

? grand cherokee brake master cylinder upgrade

I recently did a master cylinder upgrade on my 87 mj i did everything thoroughly I bench bled the master cylinder bled all brakes and all fittings are tight. I had brakes for about five minutes into my maiden voyage around my yard and then lost the pedal now i have no brakes checked all fittings still tight bled brakes again could the master cylinder be bad ? i also changed the proportioning valve because they mj one is different so i used one from an 88 xj where should i start to locate my new problem? thanks 87mj

Last edited by 87MJ; Jan 25, 2011 at 08:25 PM. Reason: not finished

Jan 25, 2011 | 08:26 PM

Tacedaddy

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Joined: Jun 2010

Posts: 21

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From: Staunton/Winchester

Year: 1990

Model: Cherokee

Engine: 4.0

I HOPE YOU SWAPPED THE MASTER AND THE BOOSTER from a WJ

if so i had a little snag like you basically the rear brakes were not bled enough.... keep bleeding