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31st July 2015, 05:45 PM
#11
Is at a V8 or TD5?
My V8 always has had this, to the point I used to double tap subconsciously.
Dad's TD5 never suffered from this, but has been better maintained in its life, than mine I reckon.
With regard to why it does this, if the disc is a bit warped, and the bearings a bit worn the disc run out is greater, pushing the pads away from the disc, as the wheel revolves, first push of the brakes closes the gap, second therefore not long throw.
Try this test. Run at idle and press the brake up tight. allow the system to rest a minute with the foot off the pedal. If the brake has improved feel on the next press, indicates that you might need to check bearings and discs.
I know that my feel was greatly improved with new discs, pads, rear bearings and power bleed of the brake fluid following LR instruction using the Nanocom. But then it ought to be!
Long and short of it, it's an old car. Heavy maintenance is sometimes required.
Good info on this thread for Power and Manual bleed on a Discovery 2
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1st August 2015, 12:57 PM
#12
A couple of observations with my V8 D2.
When the brakes working well they are still a bit spongy and still take a bit of effort when compared to other makes.
The ABS modulator design has two built-in air pockets (accumulators), one in each circuit. These help the unit to modulate the fluid pressure when the ABS function is activated.
Replacing the brake hoses helped a bit with the feel.
Replacing leaking fuel injector O rings (the lower manifold O rings) stopped some minor air leaks that fixed a small idle roughness and greatly improved the vacuum assist on the brake booster.
Cheers
Ron
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1st August 2015, 02:46 PM
#13
My other vehicle is a Skoda Yeti which has fantastic brakes. It makes my Disco 2 feel terible but I doubt it's really that bad. The Skoda has a system that brakes harder depending on how fast you apply the brakes and then that's also ECU adjustable (not user). On top of it braking for you the DSG changes back gears and gives engine braking.
I just find it a huge change going from my 14 year old D2 to my 2 year old Skoda.
Happy Days.
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