If its pulling to the left the problem is most likely wth the right brake, common mistake people make is always to go for the brake that is pulling, the fact you say you did not really find any seized pistons say to me they are possibly not in the best of health?

Slap two new calipers on it and be done with it.
 
Sounds like you still have some air in the system. I thought you were supposed to work from furthest to closest when bleeding..so NSR OSR NSF OSF. Maybe its different for the D2, I dont know about its abs system
 
When I overhaul my braking system I replaced all the pistons with stainless ones with new seals,
The old steel pistons where heavily corroded but the bores where ok,
Another possible problem are the flexible front brake pipes, I replaced all mine but if yours have partially
Collapse internally on the o/s it will pull to the left,
 
You can check whether the front brake hoses are a problem by applying the brakes from relatively high speed, but applying the brake slowly.
If it still pulls, its not very likely to be hose restrictions as they would be only really noticable on faster brake applications.
It won't be air in the system causing the pull, if fluid can get to the calipers, fluid pressure will be the same at all calipers. Air will only effect brake pedal travel.
As an aside, you shouldn't use brake grease on brake pistons as its not compatible with brake fluid / piston seals. Over time it will cause them to go soft & distort.
 
Not sure what you mean by bedding in?
If the discs are worn and ridged/uneven, new pads won't smooth them out, but the pads will wear to the contour of the disc
 
Chrisjb330 said:
I will try that thanks.

And it is compatible, this is the stuff I used see here
https://proslip.com/piston-seal-grease/
Click to expand...

Thanks for sharing that info.
"Brake grease" is normally only designed for reducing friction between metal parts not in contact with brake fluid - eg caliper slide pins, brake shows to drum brake backplates etc
You've obviously found a better grease that is brake fluid compatible.
At the least the piston seal grease supplier also acknowledges the infamous "Red rubber grease is not a suitable piston seal lubricant – it’s not a low friction lubricant and is too thick to remain long between seal and piston" - but they miss the major issue that it's a mineral fluid based grease & therefore should never be used near brake fluid related components.

Good luck finding the cause of the pull.
 
Chrisjb330 said:
Hi

Got a 2002 TD5 Discovery 2 115k miles, had it for about a month now.

The brake discs had chips out of them when i got it so one of the first jobs was to do the brakes, i replaced front and back discs/pads (mintex) with new sliding pins and bolts, gave them all a really good clean (grinder and drill brush), spray paint then lube with pro slip stuff. Bled it the old fashioned way as per the haynes manual, front pas, front drivers, rear pas, rear drivers.

They haven't fully bedded in yet as i can just see some ridges left (the front left looks the most bedded in) but its pulling to the left under heavy braking from speed >40mph, it feels like the whole car is twisting and dipping to the front left.

I've just checked all the pistons and not really found any stuck but did find a little crap/surface rust on some. Lubed with some brake grease and worked in and out a few times. Did the front yesterday but didnt make a difference, just done the rears today.

My gut tells me theres nothing wrong with the calipers and i just need to wait for them to bed in more, but whats bugging me is why is pulling.

Advice appreciated.
Click to expand...
Hi, as it's pulling to the left & as you say that looks the most bedded in then it's got to be an issue with the R/H side, having just put discs/pads all round, new front calipers & overhauling the rears (as the pistons were fine) & knowing only too well how the money runs away with these things I would get a caliper for that side & see if that cures it. (It's not worth overhauling the old ones once you take piston & seal kit prices into account). I paid £76.95 for a pair of fronts from lr-trade-parts-uk inc. p&p.
 
FWIW you need to check the rear calipers too. If the rear right caliper is not working properly and the left one is, you will get a pull to the left. If it was an imbalance on the front calipers you would feel the steering wheel being pulled one way or the other. I don't know the D2 but I have heard D1's are know for rear brake issues often seized calipers and/or reduced rear brake power. HTH
 
lynall said:
If its pulling to the left the problem is most likely wth the right brake, common mistake people make is always to go for the brake that is pulling, the fact you say you did not really find any seized pistons say to me they are possibly not in the best of health?

Slap two new calipers on it and be done with it.
Click to expand...
Absolutely, not worth wasting time, just buy new and install.
You then have a set you can recondition with new seals and sell or keep for the next time.
 
No it shouldn’t go to the floor, with servo working it will drop slightly but stay firm,
Check for leaks? And if nothing shows it’s more than likely the master cylinder creeping,
Replacement recommended, straight forward job,
 
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