How To: Heater core replacement

Trainmaster

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I had pumped the Delco sealing tablets through the heater core as was recommended and it worked great -- for a month. Thirty-seven days has gone by and the small leak is back. Looks like I'll be pulling the dash.
 

LibertyTC

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Delco sealing tabs/stop leak is a temporary solution and not really recommended.
If you need a new Mopar thermostat or new hoses, now would be a good time to replace them.
With a new heater core installed, make sure you flush the entire system well afterwards.
Then install the the correct Mopar HOAT or Zerex G-05 coolant.
 

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