1994 toyota corolla, it was making a weird noise, i thought it was one of the belts that was worn out, so i changed the alternator belt, but noise still present , it finally died, and when cranked back it, it starts but smokes, haven't tried to move it.

Still sounds to me like a fan belt noise but not necessarily the fault of the belt.
Either the profile on the belt is incorrect or worn pulleys or one of the units it powering (power steering pump/Aircon or alternator)may have a problem. Suggest to remove the belt and turn by hand/inspect every pulley. If anyone of them is hard to turn or has any resistance noise then that will be the problem not the belt. You can verify by starting the motor and running it for a brief time without the belt on to check the noise is gone too. Hope this helps. Thank you

Sounds like you have a loose belt. A cold belt is stiff and slippery, but gets softer and more tacky when it is warm. The belt may either be worn, or just loose. If just loose, there may be a way to tension it, but in most cases, the belt is worn and needs replacement.

Make sure nothing is coming into contact with the v belt or fan blades like a pipe or cable

Check the alternator belt, see if it is too slack. Check the connections at the alternator. You may need to take it to an auto electrician, if its not the belt loose or connections, to check the alternator. Hope that helps

check your serpentine belt, could be a squeaky alternator, water pump. ac compressor, Tension pulley, worn belt, or low Power steering fluid

does it get louder when you turn the wheel?

Loosen alternator bracket bolt at top of alternator.

Loosen adjustment lock bolt on passenger side of alternator.

Loosen adjustment bolt under front of alternator until belt can be removed.

You either have a loose drive belt, or an extremly worn drive belt. I would recomend replacements of all of the belts.

Click on the following free direct Link. It has the Timing: Belt and Mark Diagrams for your 1994 Toyota Corolla. Plus additional Instructional and Directional Diagrams.

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

http://www.2carpros.com/car_repair_information/year/1994/make/toyota/model/corolla/1994_toyota_corolla_timing_belt_diagram_marks.htm

possibly belt is slipping old and worn out

loosen the bolt that is holding the adjuster of the alternator. loosen the belt by pulling it and the alternator would slide in. remove and replace the belt.

do the reverse on installation.

remember to tighten all bolts of the adjuster and alternator after tightening the belt.

tnx 4 using fixya,

drcool