Mark Seymour - Reference and Resources

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Ginetta G40 Brake Pad Replacement (Procedure)

If you're using the G40 on track, I recommend replacing or refreshing the front brake pads every other track day. The pads glaze quite quickly, well before they wear down.

Buying new pads

You can only get the pads from Ginetta, although they are manufactured by PFC. The pads are the same for front or rear calipers. For more information, see: Ginetta G40 Wheels, Tyres & Brakes Info.

Procedure for replacing front brake pads

You'll need to remove the caliper to replace the brake pads. This requires the following tools:

  • Trolley jack
  • Wheel bolt socket 18mm and torque wrench (set to 80 n/m)
  • Pliers
  • Socket with 8mm Hex bit; or 8mm Allen / Hex key
  • Piston compression tool such as this one from Silverline on Amazon

(Step 1) Jack up the car and remove the road wheel.

(Step 2) On the brake caliper, remove the pins that lock the brake pads in place. These pins are secured by a fastening clip through the middle hole of the pin. Pull the clips out with pliers and then remove the pins.

(Step 3) On the rear of the caliper, find the two bolts that hold the caliper onto the hub and loosen them with an 8mm Hex bit / key. Remove the bolts to free the caliper from the mounting. Obviously, don't let the caliper drop to the ground, as it may damage the brake pipe union to the caliper. Support the caliper in some way, place on a stand, etc.

Also note that there is a washer that sits in the bolt joint and a different washer between the caliper and the hub.

(Step 4) Remove the brake pads.

(Step 5) Compress the caliper pistons so that you can fit new brake pads and replace the caliper on the disc / rotor. If you don't compress the pistons, it won't be possible to put the caliper back over the disc / rotor. Use the tool listed above to compress the pistons.

(Step 6) Place the new brake pads in the calipers and reverse the previous steps to re-mount the caliper, replace the pins (use the second / middle hole for securing with the clip) and replace the road wheel.

Refreshing used brake pads

You should be able to refresh brake pads by scrubbing them with coarse emery paper or sand paper. I'm not sure how effective this is, but folklore says it works.

Bedding in new pads

For a procedure on bedding in new brake pads, see here: https://www.apracing.com/Info.aspx?InfoID=47&ProductID=2858

Photos

G40 brake pads caliper and pin

G40 brake pad retaining clip

G40 brake pad retaining pin

G40 brake caliper removal of securing bolts

G40 brake caliper removed

Supporting the G40 brake caliper when detached

G40 brake pad parts