Coolant System Flush and Refill · ComponentBlock Drain Plugfor 1964 GMC Handiван 230ci I6 · RWDUnitslb-ftNmTorque18lb-ft25 NmNotesIf equipped, use new washerOther components in Coolant System Flush and RefillDrain Petcock4 lb-ft · 5 Nm📝 Suggest a correction to this torque spec