Most probably the noise is piston slap, this noise is heard when the engine is cold and disappears when the engine is hot. if the slap is very strong when the engine is cold and the noise becomes less when hot but still the noise can be heard.
The most common cold engine noise in a Chevrolet 4.3L is lifter clatter. Try using a lighter weight oil and see if the noise changes or goes away.
cold engine
valve variator
Metal expands in the heat and contracts in the cold, so the noise you are hearing is the metal growing/shrinking due to the changes in temperature.
could be where your power steering fluid is cold and thick
different parts inside the gearbox will have driped dry and make more noise after starting from cold this noise should go away fairly quickly as the running gears move the oil around the gear box
An engine block heater for a 2004 Hyundai Tiburon is a part of the engine that helps keep the engine warm when it is very cold outside. It has a plug that needs to be plugged into an electric outlet when the car has to sit in the cold weather.
changes in temperature and weather can cause noise was it cold when noise started and warmer when it stopped??
Oil slow getting to the head
it needs to b e checked by a garage
One cause of a popping noise from the front end while backing up in cold weather is the drive shaft. A mechanic can help find the problem.