I have a mitsubishi challenger with a 4m40t engine
hi
First check that the temperature gauge sender unit is working correctly it maybe faulty.
Check that the transmission is not causing to much heat going through the cooler from the load which runs through the radiator if it is automatic.
Ensure that the engine has had a proper flush when all the new parts were fitted. The engine block may have blocked galleries.
Hope this helps you out, let me know what you find.
Jason
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