The Toyota broke
down and the alfa
Join Date: Dec 2011
Location: United Kingdom
Sud Brake problems
Right, so I've managed to sort out quite a few problems with the minari but one thing I've never been particularly clear on is Brakes. I can do them on a bike, but car brakes I tend to stray away from.
Anyway, I was driving the minari today with the roof off in the nice weather, took it up a long stretch of duel carriage way, all was going well. I turn off into a town and as I approach a roundabout I press the brake pedal and.... nothing. Luckily the car in front moved off so I carried on past the roundabout through the town and drove into my works car park, all without brakes (just used engine braking, probably not the best move but there was nowhere safe to stop). I parked up in the car park stopping with the handbrake and had a look at the master cylinder, no leaks. Looked at all the brake callipers and visible lines, no leaks. Ok.
I then got back in the car and sure enough I still had no pedal pressure till right at the very bottom of the travel where it felt really spongy. I pumped the brake pedal and after 3-4 pumps the pressure came back and then sort of faded away again. I went into the building to sit down and calm my nerves, called my mum to get her to bring me the roof for the car and then went back out after 15mins. Got back in the car and the pedal pressure is back completely. I cant get it to go down like it was before. I carefully drove the car forwards and the car stopped on the pedal. Same when I reversed back.
Could I have boiled the fluid or have I got a leak somewhere? (master cylinder?) I wasn't driving hard or fast at all, wasn't hard on the brakes or anything. Thinking about it, I doubt the last owner of the car bothered to change the brake fluid, and the last time that would have been done is 1999 at the latest! The master cylinder is still full of brake fluid up to just before the max line. Does brake fluids boiling point decrease that rapidly? The car made it from Bristol to Leigton Buzzard without brake issues so I've got no idea.
The only way I can think that the brakes would have boiled is if one or more of the callipers were binding. I'm pretty sure they are but with the fronts being in-board callipers I have a feeling it may be the handbrake that's causing the binding.
Anybody got any views? I'm going to have it picked up by the AA tomorrow and get them to take it to a garage since I have a loathing of car brakes but if anybody has any suggestions then I'd love to hear them.
Bikes: GSXR 400 Gk73a, Kawasaki ZX7R
Cars: Two 1.5 Minari Road Sport Mk2's and a 1.7 16v Minari RSR
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