payydg

Well-Known Member

• Sep 29, 2016

• #1

GF is buying a new car. On the last MOT it has "nearside rear rear brake fluctuating, but not excessively (3.7.B.3)" as an advisory.

What does this mean? I looked at the manual and it a breaking test but thats as far as I can work out.

What could cause this? Air in the system?

Ta!

 

Paul D

Old, nackered 'n broke, but the Landy is fine . :)

Events Planner

• Sep 29, 2016

• #2

Most likely the system could need bleeding .. bu tit might also be worn discs, or pads ..

 

Grezzer

Well-Known Member

• Sep 29, 2016

• #3

Check the discs and pads and more importantly it sounds like the brake pressures are not consistent when testing so it's looking like a brake cylinder or air in system.

 

payydg

Well-Known Member

• Sep 29, 2016

• #4

One of the other advisories is worn break pads. Thanks for the info. Hadn't thought of brake cylinder

 

discool

Well-Known Member

• Sep 29, 2016

• #5

Modern brake test rollers are so sensitive that they can pick up the slightest defects on disc's, fluctuating can be associated with a seized/partially seize calipers, or even just brakes that haven't been regularly used.

 

payydg

Well-Known Member

• Sep 30, 2016

• #6

Ok thanks. Will report back once I've seen the car

 

Disco1BFG

Well-Known Member

Full Member

• Sep 30, 2016

• #7

discool said:

Modern brake test rollers are so sensitive that they can pick up the slightest defects on disc's, fluctuating can be associated with a seized/partially seize calipers, or even just brakes that haven't been regularly used.

Click to expand...

Agreed - it could be nothing, or it could be something - needs investigating - you do "sort of" need your brakes.

Saw a weird reading on a Peugeot once, that corner had a new wheel too.... turns out it had been heaviliy curbed, and the stub was slightly bent.....

My local MOT place will, if they aren't busy, allow folk to use their brake tester to confirm a cure on such issues - worth an ask....