Renault Forums :: Independent Renault forum - View Single Post - Renault Scenic RX4 - Poor Brakes

View Single Post
post #5 of (permalink) Old 20th December 2007
Junior Member
Join Date: Feb 2007
Posts: 22
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 0
Thanked 0 Times in 0 Posts
If the peddle hits a stop then you have one or two problems. It could be either or both as it will have the same effect both ways.
  1. The brakes are fading due to heat build up in the pads being transfered to the caliper pistons under heavy use, this can happen in emergency stops and not just with heavy loads or on extreme hills. This is down to brake pad compounds and I would look as a good aftermarket manufacturer like Dunlopad or EBC for some better more performance oriented pads. These pads will not build up as much heat as they are a higher friction rating and this will also transfer less heat to the calipers so you have less fade. Look at the pads you buy and you will see two letters together which will be from A to H, A is the lowest friction rating and H is the highest. The first letter is the rating COLD and the second HOT. Some race pads can be BH so they need heat to work fully others can be HB so they are nice and sharp but will not take too much heat and will fade as they get hot. Most cars do not need HH rated pads so they will be somewhere in between. ALL pads have this marking no matter what brand so you can compare them accross the brands and know what you are looking at.
  2. Air in the system. There does not have to be loads of air to make the brakes inefficent under load as heat build up in the pads and calipers will cause the air to expand and brake fade will become more pronounced.
Currently in morepower's garage:
2000 Scenic RX4
morepower is offline  
For the best viewing experience please update your browser to Google Chrome