How do you replace the expansion valve on a 1986 300zx Nissan and also what do you have to do to replace the condenser I put a new drier and compressor in my car But guess it has some trash in it.?

To replace the expansion valve on a 1986 Nissan 300ZX, first, locate the valve, typically near the evaporator. Disconnect the refrigerant lines and electrical connectors, then remove the mounting bolts to take out the old valve. For the condenser, drain the refrigerant, remove the mounting bolts, and disconnect the lines before installing the new condenser. Ensure to flush the system to remove any debris before reassembling and recharging the AC system.