goingjag

I inherited a 1989 100 that I haven't used much until my A4's water pump took a hike. While I'm working on that I started driving the 89 again. Out of the clear blue the brakes are locking up sort of. It's as if I'm riding the brakes, and the longer it goes obviously the hotter it gets. I didn't even realize it until I had a hard time accelerating. Got off the main road and noticed that the car wouldn't move at idle. Limped it home, checked it out and couldn't find any obvious problems. It doesn't exhibit any of the "bomb" problems, the brakes work fine. At first I thought it might be ABS related and switched them off and the problem seemed to go away. Then a couple of days later it was back. Then it seemed if I started the car with my foot on the brake it would be okay. Two days later and the problem croped up again. Checked the Pentosin fluid level, and it was fine. I determined I might have overfilled it when I topped it off when I first got the car, so I vacuumned some out. I was surprised to see that it was black instead of green.

Could it be that someone put the wrong stuff in earlier and when I added the Pentosin I screwed things up?

SteveAngry

Common type44 problem...

As the brakes heat up the master cylinder tends to make the brakes "lock" up and drag...

Simple way to check if this is the problem is to drive the car and the next time it happens take some ice in a bag and stick it on the master cylinder.

Wait a minute and if the brakes unlock you know the master cylinder needs replacing.

Also, use the 5000/100/200 forum for more info...

Steve
Michigan

goingjag

Thanks for the idea. I couldn't find that forum when I first was here. Then I bumped into it trying to find my post, and now I've lost it again....I think my mind is failing with my brakes.