andyfreelandy

andyfreelandy

Well-Known Member
A minor annoyance on the TD4 Sport 2003.

When I bought the car it had seized calipers and worn discs. Calipers and discs replaced and Mintex pads fitted.
All good with no problem for 15,000 miles.

Due to a long Scotland trip looming, I replaced the pads early (they had 7 or 8mm) with Girling pads which were on offer.

After a few hundred miles the fronts started to scream at the last bit of braking. Annoying and smacks of a poorly maintained vehicle 🙄

So, cleaned everything up, checked sliders, fitted Mintex pads again and after a few hundred miles the squeal is back.

Not had it on any other Freelander 1.

The pads have soft backing pads to avoid this.

Something is making the pads mirror shiny.

Anyone got any brilliant ideas ? Tried putting ceramic grease on the back of pads too. No change.
 
Last edited:
Thanks, calipers are only a year old, but it is possible. Brakes run cool when driving with no brake application.

Thinking - I renewed the pads and discs first before realising the calipers were not returning properly, although not seized. Is it possible that the discs have been 'glazed' ?? This could cause a squeal.

Next move will be to check caliper pistons and then maybe fit grooved discs?

I do a mix of gentle and hard braking and have stabbed pedal when it squeals - just makes more noise :)
 
andyfreelandy said:
Thanks, calipers are only a year old, but it is possible. Brakes run cool when driving with no brake application.

Thinking - I renewed the pads and discs first before realising the calipers were not returning properly, although not seized. Is it possible that the discs have been 'glazed' ?? This could cause a squeal.

Next move will be to check caliper pistons and then maybe fit grooved discs?

I do a mix of gentle and hard braking and have stabbed pedal when it squeals - just makes more noise :)
Click to expand...
Put a bit of grease on the discs, that’ll stop it…
NO DON’T !!!

I’m with your ‘glazed disc’ explanation.
Don’t you have a couple of spares in your stash that you switch briefly, to rule in/out?
 
Thanks for the great advice !! It is possible that I heated the new discs and they have gone too shiny ?!?!

Which leads to a discussion with @kernowsvenski last weekend.

Grooves and holes in the discs, good, bad or waste of time ??

I can see how they might displace brake dust and perhaps add to the cooling and even maybe reduce the unsprung mass of the front wheels (not measurable) but anyone ?!??!
 
I’m no great expert on brakes (can you tell?)
But - I can see the potential benefit of holes in the discs aiding cooling. Beyond that, and unless you’re into super-speeds and heavy, prolonged braking, I don’t see the benefit from grooved discs???
 
AI says;

  • Slotted discs: Feature grooves that run along the disc's surface. They offer improved gas and water expulsion and can enhance pad bite.

  • Drilled discs: Have holes drilled through the disc, offering better heat dissipation and gas expulsion than solid discs.

  • Combination (drilled and slotted): Some discs combine both features for enhanced braking performance.
 
So after our conversation Andy I did alot of reading and looking around and my conclusion is the drilled and grooved disks will only benefit you if you're driving at high performance levels, and for typical Freelander type driving - on or off road - you're better off with the increased surfaced area of non drilled and grooved disks
 
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