Bosch Common Rail Inner Coil Shim

Bosch CR Inner Coil Shim - 077-101

The bosch common rail (CR) inner coil shim is an adjustment component in diesel injectors that operates precisely under high pressure and helps maintain stable injection pressure. It plays a role in the fine adjustment of the fuel quantity and directly affects the amount of fuel injected during engine start. It is a standard component in almost all Bosch diesel injectors. Unlike other calibration shims, it specifically regulates the fuel quantity produced during the cranking phase. To achieve high surface quality and precise measurement values, it is manufactured with high accuracy through a lapping process.