6. CYLINDER HEAD/VALVES People GT 125i DISASSEMBLY Valve Spring Compressor Remove the valve spring cotters, retainers, springs, spring seats, oil seals and valves using a valve spring compressor. · Be sure to compress the valve springs with a valve spring compressor. · Mark all disassembled parts to ensure correct reassembly. Special tool: Valve Spring Compressor A120E00040 IN Valves EX Valves 6-11