96 Nissan 240sx replaced timing chain now having white smoke from exhaust?

White smoke from the exhaust of your 1996 Nissan 240SX after replacing the timing chain may indicate that coolant is entering the combustion chamber, often due to a blown head gasket or a cracked cylinder head. It's also possible that oil is leaking into the cylinders if the timing chain replacement disturbed any seals or gaskets. To diagnose the issue, check for coolant in the oil and perform a compression test. If necessary, consult a mechanic for a thorough inspection.