I have replaced the starter twicw and still making a awful noise. i dont know if someone has replaced the flywheel or whay. has anyone else experienced simular problems

I assume you are referring to spinning sound, which is starter motor, and not knowing what model vehicle you are talking about, all I can do is give general idea what is wrong. 99% of the time it is your bendix drive on starter motor which is a solenoid activated gear which engages your starter motor with fly wheel gear. It is a pretty easy fix depending on car, sometimes it is the connection on starter, so check connection for corrosion, try tugging on it. Good luck.
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Some starters must be aligned for the proper engagement; with chevys it is with shims. Check your shop manual for your car model and vin to find the procedure for setting the proper clearance.

For get to put in a shim/plate between the starter and transmission/engine? Could be the old starter chewed up the flywheel.

Bad starter motor drive, or damaged flywheel. Take out starter and look at the starter drive teeth and all around the flywheel..

the ring gear on the fly wheel may have damaged teeth or not have the right gear teeth count to be compatible . Pinion teeth have to match the ring gear teeth or they have trouble meshing and that makes it hard to turn over. If the ring gear teeth have been damaged then the gear box will have to come out to get the fly wheel / flex plate off. If it is auto then it is a simple matter of replacing the flex plate . But if manual the ring gear is removed from the flywheel and a new one fitted. Most accredited service shops can do this operation. count the number of teeth on the ring gear and the number on the starter pinion and take the figures to an auto electrician and he will know it they are right.

probably have to replace the flywheel and the starter bendix as both gears probably are worn

I don't see how the noise you hear could be coming from the water pump or radiator but yes it could be coming from not having the starter shimmed out far enough from the ring gear. Did you change the starter or do anything prior to hearing this noise?

It looks like you have an issue with the starter not engaging the flywheel correctly. Does it make a BrrrrRRRRRRRRRRP noise? Best advice: Replace the starter. Do not get it rebuilt. If you replace the starter ASAP, you may be OK. If not, you are going to have to have the transmission pulled, and you will have to replace the flywheel; that is what is being damaged by the bad starter drive. This is, unfortunately, a common issue.

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Toyota Ed

You may need to install what they call shims in between the starter and the flywheel in order to align it correctly with the flywheel

remove the starter and take it to "auto zone" for bench testing
the small gear on the starter is made of a softer material than the flywheel. so the small gear will wear out first, the starter is easier to replace than the flywheel.
if the starter test "good" then something else is the problem