This super simple flush with a water hose fixed the issues and for only $5 and 15.

— if you are worried about the small'ish amount of water in the heater core not being distilled, you could try and flush it again with distilled.

— i used my old heater core hose from the four door to make two plugs so that i would not have the coolant leaking out from the engine.

Because the temp is so cold in minnesota, i bought a 1/12 horse fluid transfer pump and ran a 50/50 vinegar and water mix.

When you're done with the flush disconnect the heater core hoses and forward and reverse flush the.

This video shows an easy way to flush your heater core on a jeep 4. 0l straight 6 motor (xj cherokee, zj grand cherokee, tj wrangler, yj wrangler, etc. ).

— pull the heater hoses at the engine (plug the engine to save your coolant, collect what runs out of the heater hoses and put it in your recovery tank), then using full pressure.

There are several good threads and good videos addressing engine coolant changes and back flushing the heater core.

— as the winter months near, and temperatures drop throughout new england, i finally got off my butt and decided to move forward with the famed heater core flush as.

Leave the two coolant hoses attached at the bulkhead where they exit (next to the battery in the engine bay) and follow each to where you're able to.

— as a last ditch effort i would like to try to use thermocure to flush my heater core, which seems to be the most recommended product for the job (correct me if i’m wrong.

— i would read up on a citric acid flush and try that if it isn't leaking.