s14 brake fade/failure/sieze

[mr2lickit]

Ok guys.... I have a 1997 240sx and I just recently had some brake issues. The story: I was driving home from work and suddenly my brakes started applying by them selves (brake sieze), Eventually my front brake completely locked up and there was nothing more I could do. To my amazment about an hour later they unsiezed and I was able to get my car home (I figured out my front brake pads were shot). The next day I changed all the pads and bled the brakes. When I applied the brakes now the pedal doesn't engage untill the very end . (I mean the very very end). My questions are why would it do this, and what can I do to fix it? I have no vacume leak and the brake fluid seemed clean.

P.s. I've bled the brakes 3 times since then, just to check for bubbles (none).

[SeVa-S13]

How are you bleeding them? Taken a look at your master cylinder?

[mr2lickit]

It takes atleast 2 people, but I'm at the brake caliper and I stick a clear tube in the bleeder valve and have someone pump the brakes untill 60% of the fluid is gone to check for bubbles and if the'res anything contaminating it (I've done this on all 4 wheels even though I feel it wasn't needed). And repeat the step as much as needed ( I keep the brake fluid filled). But I just realized there is a tech forum so I'm also moving this question over there.

[SeVa-S13]

To properly bleed the brakes, you need to start with the wheel furthest from the master cylinder, then work your way closer. (PR,DR,PF,DF)

And just in case I'm an idiot and/or wrong, I moved it to Tech for you.

[mr2lickit]

cool didn't know about the order, but luckly it was done that way twice! I'm sure its not a issue with the fluid, but a part. If any one could point out what part it might be and have a decent backing, I would definently purchase the part and replace it. Oh and thanks for moving it to tech!

Oh also posted this on "nissan online mechanic" hehe. I need fast results haha.

[180fan]

it's your caliper pins. Make sure they're greased up under that little rubber accordian like boot.

[mr2lickit]

Lucky for me I ran into the human auto dictionary (teddy @ enjuku) and he told me that most likely the seals on the brake master cyclinder went bad and they are leaking. I will try the caliper thing first (since it costs me nothing), but if that doesn't work, I'm going to go ahead and buy a new brake master cylinder.