Thread: Spot that part! What is this please?

Gday Mr Disco Potato,

That's the high pressure test port for the air conditioner, playing with it won't affect your braking performance.

Sounds like the power booster might be leaking , does the brake pedal feel harder than you would expect ?
As for the valve thingy, you might be able to cool the brakes with it somehow,

Originally Posted by DiscoPotato

Hi All,
Newbie to the forum (though have been reading many useful threads since I got my Disco 1 about 9 months ago).

One of several problems with my 98 Disco V8 is the brakes, they are woeful and despite bleeding them they are not much better. Since the car was bought to tow my horse float, it's rather important that the brakes work!

I'm not sure if it's common to Disco's or not but there is quite a loud air intake noise coming from the drivers side around the servo / master area - im not sure if its the servo but i guess that's where im headed at this stage. While i was poking around i found this.

What is it? Is something meant to be screwed into it? It looks like a bleed valve of some sort to me..... originally comparing with the workshop manual i thought it might be the pressure reducing valve, but have since located that on the passenger side wheel well area.

Please enlighten me

Cheers,
Disco Potato

What year model, does the front calipers have 1 or 2 brake lines connected to them, Regards Frank.

*snort* i shall stop poking at it then, as the aircon is one thing in it that works perfectly!

The brakes feel hard mostly at lower speeds (IE slowing down from 80 to a stop light is fine up until the last 10 -15 meters when i really have to stand on what feels like a brick.

Tank - it's a 98 Disco Series 1 V8 3.9. It's at home and im currently at work but ill check how many lines to the calipers when i get home.

Appreciate the help!

I had a similar problem until I changed the pads .Made a massive difference to the brakes which went from being the worst in any car I have owned to one of the best.The pedal felt like it had wooden blocks for pads ,you could stand on it and still not lock a wheel even in the wet.As you have described the problem was most noticeable at slow speed coming to a standstill
I put up with it for 2 years till I replaced what were reasonably new pads when I bought it.
I used TRW pads which were listed as an OEM equivalent they seem to be wearing well.

hmm that is very interesting! Might have a crack at pads first then since it's an easy job...Thanks for the tip!
Do you know what the Part No is for the TRW pads by any chance?

Cheers! DP

Originally Posted by DiscoPotato

*snort* i shall stop poking at it then, as the aircon is one thing in it that works perfectly!

The brakes feel hard mostly at lower speeds (IE slowing down from 80 to a stop light is fine up until the last 10 -15 meters when i really have to stand on what feels like a brick.

Tank - it's a 98 Disco Series 1 V8 3.9. It's at home and im currently at work but ill check how many lines to the calipers when i get home.

Appreciate the help!

It should be a single brake line on that model, 93 models had 2 brake lines to front caliper and 3 bleed nipples, the 3rd nipple could only be got at with the wheel off. Which meant that the top outside cylinders never got bled and would be full of crap and air, which meant crap brakes, Regards Frank.

x2 on TRW pads. Nice on DBA slotted rotors.