The MGB GT V8 pedal box mounts the brake and clutch pedals beneath the bulkhead, with the pedal pivots supported in the pedal box bracket. The brake pedal connects via a push-rod through the bulkhead to the brake servo behind; the clutch pedal connects via a push-rod through the bulkhead to the clutch master cylinder. The pedal box is V8-specific in some details to suit the V8's servo and clutch master cylinder positions.
Pedals and Pivot Bushes
The pedals pivot on shafts running through bushes in the pedal box. Pivot bushes wear in service, causing pedal sloppiness and misalignment between the pedal and the bulkhead push-rod. Worn bushes also allow uneven loading of the master cylinders, contributing to seal wear. Bush renewal is straightforward with the pedal box accessible from the engine bay.
Return Springs
Return springs hold each pedal in the released position when the driver's foot is off. Weakened return springs cause the brake or clutch pedal to fail to return to the rest position, potentially causing the brakes to drag or the clutch to slip. Spring renewal is part of any pedal box overhaul.
Pedal Pads
Rubber pedal pads on the brake and clutch pedals provide grip for the driver's foot. Worn or missing pedal pads should be renewed for safe operation, the bare pedal is slippery, particularly when wet.
Service
Pedal box overhaul typically involves removing the pedal box from the car (after disconnecting the master cylinders, push-rods and electrical connections), disassembling, cleaning, renewing bushes, springs and pivot shafts as required, and reassembly with adjustment of pedal positions. The job is best done as part of a wider brake or clutch service when the master cylinders and related components are also being addressed.
MGOC Spares
MGOC Spares supplies pedal boxes, pedals, pivot bushes, return springs, pedal pads and all associated pedal box service components for the MGB GT V8.