'89 master cylinder woes
Thread Starter
Burning Brakes
Joined: Dec 1999
Posts: 1,114
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From: Lawrenceville Georgia
'89 master cylinder woes
I had the brake booster replaced after it developed a vacuum leak then the master cylinder went south. After the shop put these on, the front reservoir of the master cylinder would transferr it's fluid to the rear reservoir causing it to overflow. I now have number three master cylinder on and it does the same thing. The tech said he has contacted GM and they say that he is over filling the reservoirs. 
The tech had the cylinder off and stroked it on the shop bench and witnessed the fluid tranferring to the rear reservoir so the problem is not in the brake system. Has anyone heard of such a thing? GM says that to only fill them half full. We have done this now and are waiting to see if this does anything. (they are remans if that makes any difference)
The tech had the cylinder off and stroked it on the shop bench and witnessed the fluid tranferring to the rear reservoir so the problem is not in the brake system. Has anyone heard of such a thing? GM says that to only fill them half full. We have done this now and are waiting to see if this does anything. (they are remans if that makes any difference)
