96 stratus overheating

vehicle overheats at stop signs and stop lights.when you take off and drive it cools back down.coolant was very very rusty.i have replaced thermostat,radiator hoses,and radiator.still overheating and fans are
working.took it to a shop and they told me it was a head gasket.i had them do the head gasket still same problem.i feel it may be the water pump no circulation at idle.just a theory.can anybody help please.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Depending on how bad this system was rusted up. The impellar on the water pump may be bad. Or a collasped lower radiator hose? With the thermostat out of the vehicle did the coolant circulate? And just curious, you had the timing belt off when the head gasket was replaced, that extra 10 min of work.... why didnt you get the water pump replaced at the same time?
Glenn Beasley Chrysler Tech
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.