Brake pads & disc - convnetional wisdom...

Oct 11, 2004 7 Replies

Conventional wisdom says, "when you replace your disks, put in new pads too" and goes on to say that this is to stop a pad that's been shaped to one disk having poor contact with a new disk.



Nowadays, with pads that are harder than the disc, can (or indeed, should) this be reversed?



I took a shufti at 'er indoor's Escort (97, 50k, all original parts) and the pads are still very meaty and look to have little wear on them while the disk is getting near its limit (20mm down to about 18.5 - min allowed 18mm.) The disks will get replaced soon but I'm trying to see any point in replacing the pads as, if they're that hard, they are going to "shape" a new disk to their wear pattern in the same way that the hard disks of yesteryear shaped softer pads, no?



Any comments (apart from the safety lobby and the penny pinchers association, please)?


Ford bits are peanuts! Just replace the lot I Paid £27 for Sierra Disks+pads....

No. If the pads have a wobbly edge on them from a previously grooved disc, they'll wear a groove in the new disc.

I must come into the penny pincher category because more than once I've used old pads on new discs if the pads were relatively unworn. Not an option available to many, but I ground the pads flat on a surface grinder before fitting.

The same result could probably be obtained by flattening the friction surface by hand on a sheet of course emery cloth. Making sure the pads finished up reasonably parallel. No asbestos in modern pads so it's safe from that POV but probably just as well to use a face mask to avoid breathing the dust. Mike.

If I replace discs, I always replace pads at the same time.

If I replace pads, I only replace discs if they need it

Seems to work out fine this way

Pads are not harder than discs. Pads are harder than they once were, but not harder than discs. Discs are made of steel.

Replace pads and/or discs, or not, as necessary. Normal driving will soon mate the pads to the discs without your even noticing. It would only be an issue in the case of extreme operating conditions, like racing.

Steve

Are you sure the pads are not glazed? Usual cause of hard non wearing pads.

-- Peter Hill Spamtrap reply domain as per NNTP-Posting-Host in header Can of worms - what every fisherman wants. Can of worms - what every PC owner gets!

No, standard Ford promble - notable too on Fiestas & Pumas, IIRC.

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required