Engine Mechanical problem
2001 Dodge Stratus 4 cyl Front Wheel Drive Automatic 163000 miles
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will replacing the belt after it has broken fix the problem or will the heads have to be reworked?

well there is a very good chance that you bent a couple of valves and possibly damaged a piston or two when the belt snapped. so you will need to do a compression test also. that will give you a good idea if you need to replace some valves. of course set the timing with the new timing belt first, otherwise you'll do more damage.