Discovery II Talk about the Land Rover Discovery II within.
Sponsored by:
Sponsored by:

Causes for pulsing brakes ?

Thread Tools
 
Search this Thread
 
  #1  
Old 09-10-2013, 09:45 AM
Externet's Avatar
Recovery Vehicle
Thread Starter
Join Date: Jul 2012
Location: Mideast US
Posts: 793
Received 110 Likes on 84 Posts
Question Causes for pulsing brakes ?

Warped rotors seems to be the least probable cause from what I have read in deep analysis reports.
Rotors contamination seem more plausible, by uneven deposits that cause areas of more and less grab/friction.
Pads contamination transferring its problem to rotors and bonding the impurities to the disc surface.
Contamination can come from unclean procedures at replacement, road asphalt splashes, tire cleaning chemicals splashing, dust, oil, grease, brake fluid splashes, river crossings, car wash chemicals, mud, even insect guts.
Overtightened wheel lugs, worn wheel bearings, flat spotted tires, bad tires.

Do ceramic brake pads behave as a magic bullet to avoid brake degradation into pulsing or there is no such proof ?
Do ceramic pads 'self clean' friction surfaces or is such a myth ?

Read consensus recommendations here about the Akebonos; what differs from other pad compositions about pulsing, (not about braking power) ?
Does anyone here has pulsing brakes with ceramic pads ?
 
  #2  
Old 09-10-2013, 09:56 AM
Savannah Buzz's Avatar
Super Moderator
Join Date: Jan 2011
Location: Savannah Georgia
Posts: 16,322
Likes: 0
Received 83 Likes on 80 Posts
Default

Warped rotors will certainly make brakes pulsate, more noticed when applied.

Brakes wear down. Rovers are heavy. Brakes wear down faster. No magic bullet except to be a long haul driver and coast into the gas stations.
 

Last edited by Savannah Buzz; 09-10-2013 at 09:58 AM.
  #3  
Old 09-10-2013, 10:28 AM
Disco Mike's Avatar
Administrator
Join Date: Apr 2006
Location: Denver, Colorado
Posts: 25,707
Likes: 0
Received 103 Likes on 85 Posts
Default

Over braking on mountain roads, hard driving and cheap pads will warp your rotors.
Nuy a good replacement set along with a set of Akebon ceramic pads and you'll be fine.
Also make sure to do a full 2 quarts SOT 4 brake flush cause if you warped your rotors, your fluid will most likely be burned.
 
  #4  
Old 09-10-2013, 11:15 AM
drowssap's Avatar
Baja
Join Date: Feb 2011
Location: Boston Strong
Posts: 9,298
Received 317 Likes on 311 Posts
Default

"Warped rotors seems to be the least probable cause from what I have read in deep analysis reports."
I don't know where you got that information from but warped rotors are the #1 cause of brake pulsating.
 
  #5  
Old 09-10-2013, 01:54 PM
Two Rock's Avatar
Three Wheeling
Join Date: Jun 2013
Posts: 69
Likes: 0
Received 9 Likes on 7 Posts
Default

What the op is referring to is that there is evidence that rotors do not truly warp but the pulsating is due to uneven deposits on the surface of the rotor

-Warped- Brake Disc and Other Myths
 
  #6  
Old 09-10-2013, 02:30 PM
04duxlr's Avatar
Pro Wrench
Join Date: Nov 2011
Location: Duxbury MA
Posts: 1,462
Received 32 Likes on 27 Posts
Default

Rotors that are installed with lugs that aren't tightened evenly always result in pulsing brakes for me. The initial paragraph on that link notes "lugs torqued in the correct order and to the correct value" as one of the requirements. I have only seen a torque wrench used to tighten lug nuts at a shop once in all the times I've had tires replaced or rotated, and whenever I have had tire removed at a shop a quick check of the torques shows them to all be different. Heat will transfer out of a rotor at different rates depending on the clamping force where it mounts.
 
  #7  
Old 09-10-2013, 04:01 PM
Savannah Buzz's Avatar
Super Moderator
Join Date: Jan 2011
Location: Savannah Georgia
Posts: 16,322
Likes: 0
Received 83 Likes on 80 Posts
Default

If it was just deposits there would be snake oil for that ( Lucas Brake Disk Revitalizer Formula 73 ).....
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
wheelgarage
Discovery I
9
06-30-2011 11:53 AM
FightOnUSC79
Discovery II
10
11-26-2010 09:43 AM
preple
Discovery II
4
10-22-2008 03:49 PM
willlane
Discovery II
4
12-10-2007 01:29 PM
ctar
Discovery II
1
07-16-2007 07:12 AM



Quick Reply: Causes for pulsing brakes ?



All times are GMT -5. The time now is 11:52 AM.