Hi everyone, haven't had any problems for ages. Went out in the car for a run around the other week and brakes decided to not work in slow traffic. Phooed myself and had to use gears. Ive got a set of Brembo to go on (had them for years!!) but just asking if there are any common failures now these ladies are getting older. I haven't had a look around it yet but just trying to get a little feed back before I go at looking at servo etc...... It might be just the fact I have only done about 4000 miles in the last 5 yrs. Gotta get my ass in gear this year!!!

 

Cheers

Calipers prone to seizing if not used particularly to cast iron ones

Firstly check the level in the reservoir for fluid loss.

Was the pedal hard or soft. Did they totally not work or just lose power?

Fluid may have boiled if the brake was dragging I suppose, that or fluid loss. Did you pump the pedal? Would have drawn more fluid in

If the brakes were dragging to the point of boiling fluid I think you'd smell it. And one or more wheels would be red hot if you were to walk round.

 

I think fluid loss or a booster problem is more likely.

 

But we need more info :)

Seen this happen on a friends car (300zx) topped up with wrong fluid. So that could be another option but unlikely Jonce would do that. :)

If the brakes were dragging to the point of boiling fluid I think you'd smell it. And one or more wheels would be red hot if you were to walk round.

 

I think fluid loss or a booster problem is more likely.

 

But we need more info :)

Yea probably right

 

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Went soft, had to pump a few times to get pressure. I never rag the 300 so I know there is no involvement of boiling over. I think its booster. Any common parts go?? No fluid loss also.

Edited January 5, 20188 yr by jonce

The booster check is to pump the pedal up to max hardness with the engine off. Then without releasing pressure start the engine. The pedal should sink an inch or so and stabilise.

 

If you're unable to pump it up with the engine off, or it sinks to the floor you have a fluid leak. Some master cylinders can leak internally and not show loss as I understand it.