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Hello, I am Randall. Is the core leaking?
The case would not have to be changed but core only. The problem is location. the dash has to be removed to get the case holding core. Book time is 6.6 hours for the job. Say $150+/- for the core? Misc materials, cooalnt etc? if shop rate is $100 per hour, you can then be in the $800 mark for the job. It is a lot of labor
You need to grab both heater hoses under hood at firewall with engine warmed up. If one is cooler than other? then core is most likely problem,
IF? BOTh hoses are hot? then you could have blend door problem, control panel problem or other. this is harder to diagnose
Not right at first. This could be due to some air trapped in system or weak thermostat
Still could be core if it is partially blocked inside.This is why the feeling of the hoses test first
You really cant. The car is what, near 12 yrs old. It may be weak. Sure easier for the stat then the core
Should do stat for maintenance as well.
Then yes,, the core could have picked some up as well. Still would swap out a $12 stat first before spending lots of $:(