Front brake calliper
Discussion
The n/s/f calliper on the Griff seems to be binding on, I managed to work it in and out and free it off but its sticking again, does anyone know if these can be reconditioned or costs of replacement?
It will almost certainly be the slider that is worn and jammed. Worth taking the slider apart and visually inspect, if it's more or less OK greasing may be enough to get it working for a while. I've been told the sliders are not available separately although you may have more luck. If you can find a pair of calipers 2nd hand (Sierra 2.0 estate IIRC) that would be one solution. If you're looking at new ones, you might be better off spending the money on some 4-pots.
Hope this helps,
Peter Humphries (and a green V8S)
If it's not a simple case of the caliper pins ( easy to clean btw), it could be a problem with the piston.
The calipers are basic single piston designs and I have seen in the past that the piston dust cap can become detacted, or the piston can suffer some corrosion if the brake fluid isn't changed regularly.
Both off these will cause the piston to jam in the bore.
If you're not affraid to strip the caliper down it's an easy job. Take the caliper off of the car ( sealing the brake hose to stop it draining), Use a car tyre pump on the bleed nipple(loosened), to force the piston out of the caliper whilst sealing the other hole of course ( make sure all the fluid is our first).
This should force the piston out of the bore. Carefully take the seals out and clean them up. and use brake fluid to clean,remove corrosion form the bore. They used to sell caliper seal kits a few years ago and you could buy kits, although I think they stopped this). Once it's all clean, reassemble and slide the piston into the bore, keeping it sqaure and it should gently slide in. reassemble and bleed the brakes etc. The hardest bit is getting the dust shield on.
The calipers are basic single piston designs and I have seen in the past that the piston dust cap can become detacted, or the piston can suffer some corrosion if the brake fluid isn't changed regularly.
Both off these will cause the piston to jam in the bore.
If you're not affraid to strip the caliper down it's an easy job. Take the caliper off of the car ( sealing the brake hose to stop it draining), Use a car tyre pump on the bleed nipple(loosened), to force the piston out of the caliper whilst sealing the other hole of course ( make sure all the fluid is our first).
This should force the piston out of the bore. Carefully take the seals out and clean them up. and use brake fluid to clean,remove corrosion form the bore. They used to sell caliper seal kits a few years ago and you could buy kits, although I think they stopped this). Once it's all clean, reassemble and slide the piston into the bore, keeping it sqaure and it should gently slide in. reassemble and bleed the brakes etc. The hardest bit is getting the dust shield on.
The sliders look fine, its the piston that’s sticking, having spent large amounts on the respray etc not sure if I can run to 4 pots as well, I did wonder if the callipers can be rebuilt using a rebuild kit, does anyone know if the calliper are modified by TVR as the local motor spares shop said they’d do a exchange one for £50! I need to take it in so they can make sure they get the right one but they get the parts within a hour so shouldn’t need to be off for to long!
Also when I take the calliper off how should I go about blocking the brake pipe as it’s got braided ones!
Also when I take the calliper off how should I go about blocking the brake pipe as it’s got braided ones!
If you can get a reconditioned one cheap go for that.
AS for blocking the pipe,
I'd take the brake resovior cap off first and cover with cling film, then replace cap, this will stop any rapid leaks from the removed caliper, then seal the pipe end with cling film/plastic sealed on with a tigh elastic band, it's not permanent but will stop excessible fluid loss. Holding the pipe vertically upwards will help aswell.
Take care not to get any on the paintwork when you remove the cling film.
AS for blocking the pipe,
I'd take the brake resovior cap off first and cover with cling film, then replace cap, this will stop any rapid leaks from the removed caliper, then seal the pipe end with cling film/plastic sealed on with a tigh elastic band, it's not permanent but will stop excessible fluid loss. Holding the pipe vertically upwards will help aswell.
Take care not to get any on the paintwork when you remove the cling film.
Paul V said: Ha ha, very funny!!!!
Yes went along yesterday, and out for a bit of a blast after as well! Found a Griff yet?
We very nearly came, but Alison wanted to get on with her accounts for the taxman, and I was feeling a bit
lethargic. I still have'nt seen your Griff, maybe on the 15th.
I've got my eye on a couple of ads, might be able to do a spot of viewing next Monday after I finish nights.
Cheers,
Paul.
Paul V said: Hopefully I’ll get along to the meet, not sure yet depends what happens with the calliper and a few others bits!
What models are you looking at?
There's a starmist crimson 500 at Offord, and a similar car at a garage in Herts. I fancy the colour after seeing a chimaera at the November Sunday meeting.
Paul
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