brake problem

Need technical Q/A then you're in the right place

Moderator: martauto

Post Reply
User avatar
e30-ian
E30 Zone Newbie
E30 Zone Newbie
Posts: 98
Joined: Fri Jul 09, 2010 11:00 pm
Location: cheshire

Sat Jan 01, 2011 7:03 pm

happy new year e30 owners,
today i had the car full of people, i was on motorway for a good hour and came up to a round a bout, when i went to use brakes nothing happend, pedal was hard as normal but the car wasnt stopping nor slowing down 8O i had to downgear very fast but still lost control of car, when i got out to check car everything seems ok with fluid and pads are ok, what could have corsed this to happen, could have been much much worse, im putting it down to brake fade and ive orded some cross drilled type discs but does anyone else thik diffrent ?
asmith88
E30 Zone Addict
E30 Zone Addict
Posts: 2684
Joined: Sat Aug 23, 2008 11:00 pm
Location: Co Down, N.I

Sat Jan 01, 2011 7:49 pm

how hard is the pedal?servo ok? try startng the einewith the brake pumped up before hand, wll the brake pedal slowly sink downwards?
1990 brilliant red 318 is
User avatar
eltel
E30 Zone Regular
E30 Zone Regular
Posts: 654
Joined: Wed Nov 09, 2005 11:00 pm
Location: mid wales
Contact:

Sat Jan 01, 2011 7:54 pm

you need to check all your pads/discs/shoes/cylinders firstly for wear/damage, check all the brake hoses for leaks and get someone to hold the pedal down while you check that they dont bulge under pressure..brakes are an essential piece of kit as you found out.

if they are all ok you only really have the master cylinder and servo left in the equation.

what car is it and had you been using the brakes quite alot prior to the incident to warrant that much fade??
Only in the good lord we trust.. In everything else we check!!


1988 325i Tourer, Lowered, Deep Dish Alloys, Obc, Cruise Control, Heated Leather Sport Seats....
User avatar
e30-ian
E30 Zone Newbie
E30 Zone Newbie
Posts: 98
Joined: Fri Jul 09, 2010 11:00 pm
Location: cheshire

Sun Jan 02, 2011 2:39 am

its a 325i, had it in garage tonight and did not find anything tobe wrong, pedal has gone soft now but isnt going to floor, front brake hoses dont look the best so on tuesday in work im fitting new hoses, discs and pads on front and a fluid change, also noticed that my brake cooler thingys at front are missing, do i need them ?
e30topless
E30 Zone Team Member
E30 Zone Team Member
Posts: 13598
Joined: Wed Aug 23, 2006 11:00 pm
Location: surrounded by scrap

Sun Jan 02, 2011 1:41 pm

if your back plates are missing the crap from the road won't help your brakes, esp in the wet?
User avatar
eltel
E30 Zone Regular
E30 Zone Regular
Posts: 654
Joined: Wed Nov 09, 2005 11:00 pm
Location: mid wales
Contact:

Sun Jan 02, 2011 2:56 pm

you'll be surprised how much difference just a fluid change will make.. especially if it is very old fluid in there currently
Only in the good lord we trust.. In everything else we check!!


1988 325i Tourer, Lowered, Deep Dish Alloys, Obc, Cruise Control, Heated Leather Sport Seats....
asmith88
E30 Zone Addict
E30 Zone Addict
Posts: 2684
Joined: Sat Aug 23, 2008 11:00 pm
Location: Co Down, N.I

Sun Jan 02, 2011 11:25 pm

i competley agree with the above, did this in a mini
1990 brilliant red 318 is
keri-WMS
E30 Zone Camper
E30 Zone Camper
Posts: 1269
Joined: Sat Apr 29, 2006 11:00 pm
Contact:

Mon Jan 03, 2011 7:47 pm

Could the ABS be doing this? Also might be collapsed/blocked brake lines? Also could be a sticking caliper is boiling the fluid, meaning the pedal goes straight to the floor (meaning you feel "nothing, then hard"), and explaining why you have a soft pedal now that the car has cooled down?
WMS E30 brake kits! (4-pot 280mm & 300mm front / 2-pot 290mm rear)

www.wms-brakes.co.uk / http://www.e30zone.net/modules.php?name ... c&t=209737
User avatar
eltel
E30 Zone Regular
E30 Zone Regular
Posts: 654
Joined: Wed Nov 09, 2005 11:00 pm
Location: mid wales
Contact:

Mon Jan 03, 2011 8:27 pm

the abs would just give you a grinding under the pedal if it was cutting in or not at all if failed, check your calipers, discs, pads etc and definately put new fluid into the system and bleed fully
Only in the good lord we trust.. In everything else we check!!


1988 325i Tourer, Lowered, Deep Dish Alloys, Obc, Cruise Control, Heated Leather Sport Seats....
Post Reply