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Changing the Front Brake pads

See also changing the rear brake pads.

There are plenty of good articles on the net about changing brake pads, and it's a really easy job, but I thought I'd mention my experience to encourage those who are unsure whether or not to try it for themselves, and so I have a good reference to remind me what to do next time I have to do it myself! It's scary to start alone on a job on a safety-critical component, but this really is a simple thing to do, and there's not a lot that can go wrong.

I decided to fit EBC Green Stuff pads which seem to be generally well liked on MX5s, supposedly better (if slightly quicker wearing) than the stock pads, and a bit cheaper. At main dealer prices, I saved £52 by fitting the pads for myself, and although the job took about an hour and a half in total the first time, I can now do both front wheels in about 40 minutes. Oh, and unlike my Mazda dealer, I won't forget to put all the springs in!!!

Things you will need:
(As it's difficult to drive to Halfords without wheels or brakes when you realise you need something more ;-)
New pads! Make sure you get the right ones (On Mark1 MX5s the 1.6 and 1.8 MX5s have different brakes. Apparently on Mark2 models the brakes are now the same). Always replace the pads on both front wheels together
Copper grease (available from Halfords etc)
Spanner or Socket wrench (17mm for Mk2 1.8i; allegedly something like 14mm on 1.6's)
Wheelbrace, Jack, Axle stands, Wheel chocks
2m of String
Possibly a flat-bladed screwdriver & a G-Clamp

Installation:
Don't just take my word for it... read the brake-pad article on miata.net for a good description of the process. Here's my illustrated checklist of the steps to take, which may help clarify the details of the miata.net article:

(1) 'Crack' (loosen) the front wheel nuts while the wheels are still on the ground

(2) With the handbrake on, and the car in gear, put some chocks around the wheels just to be sure, jack up the car & get it safely onto some axle stands

(3) Remove front wheel
(4) Replace a couple of the wheel nuts to hold the disk in place

(5) Remove the bolt at the bottom (rear) of the caliper. Holding the pads in place to stop them springing out, carefully rotate the caliper back and up until it clears the pads. You should end up with (see image - left to right) a squeal shim, 2 springs, 2 pads and 2 shims (backing plates). If the metal end-clips (not shown) fall out with the pad, replace them in the caliper.

(6) Tie the caliper up out of the way with the string
(7) Remove the cap from your brake master cylinder

(8) Compress the brake caliper piston back - I am usually able to do this with a tight squeeze of my fingers (I have to hold the pressure on for about 20 seconds and the piston gradually sank back in), but you may find it is necessary to use a G-Clamp to squeeze it back. (Some sites recommend levering the piston with a screwdriver, but this uneven pressure can damage the mechanism).

Take care that the brake fluid in the master cylinder doesn't overflow, as it'll do nasty things to your paint - the images show the amount the level of mine rose (for 2 front wheels - almost a centimetre for each wheel).
(9) Remove the shims from the backs of the old pads and clean them

(10) Smear copper grease on the back of the new pads (be careful not to get any on the front/braking side!) Clip on the shims

(11) Clip the squeal shim over the locating-lug on the end of the pad

(12) Apply copper grease to the back of the shims

(13) Slot the pads into place, add the springs, and slide the caliper back over them

(14) Apply a little grease to, & replace, the bolt on the bottom of the caliper (Mazda recommend rubber grease for this)

(15) Replace wheels. Remember to tighten the nuts after you have lowered the car off the jack

(16) Pump your brakes several times to get everything properly seated

(17) Put brake master cylinder cap back on

(18) Take a tentative test drive. Take care to brake gently for the first 100 miles to bed the pads in.

Fitting time:
My first time took an average of 41 minutes for each wheel, as I was careful and took time to take lots of photos!
Now it takes me less than 20 minutes per wheel

Results:
After over 20000 miles including track days at Kemble Airfield and Donington Park, I can now report that I'm extremely happy with EBC GreenStuff v4 pads. They produce significantly less brake dust than stock pads, seem to wear less on track, definitely bite better, showed no signs of brake fade, and did not glaze over on the track (they work perfectly on leaving the track whereas the stock pads would always take about 2 weeks (200 miles) of normal driving before they returned to full effectiveness).


September 2001-January 2004



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