Question about 1991 Chrysler New Yorker

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Where is the heater core on a 91 Chrysler New Yorker and how do I swap it out

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Well--

If you pop the hood and look at the firewall there should be two heater hoses that run from the water pump/manifold to the two inlets on the firewall usually on the passenger side. From inside the vehicle, panel removal is necessary and there are probably a couple of bolts. So--the first thing I would do is to find access and a way to get it out before taking any hoses off or draining the radiator. Once you find access, get the new heater core, and have plenty of time you can begin by draining the radiator (in a container), removing the hose clamps on the firewall (label the hoses - top/bottom) and remove the heater core (some times they have putty around the pipes and are often a ****** to get out). Once you have the new one in and the hoses connected refill the coolant system (radiator) with antifreeze and water. NOTE: go to walmart or an autopart store and get a PH tester (Prestone coolant tester) about $3. Read the directions and the recommended level on the PH tester, there are two sides a boil over (265 degrees) and a freeze-up (-34 degrees) add antifreeze and/or water until at recommended levels (tip: buy straight antifreeze not 50/50). Some heater cores are copper and some are aluminum, I have not had problems using tap water on either type but you should use your best judgement.

I hope this helps!

Posted on Nov 06, 2012

  • asha park
    asha park Jan 09, 2014

    does anyone have a diagram of how the coolant/anti-freeze system runs. Also of how to get to the heater core panel for panel please????

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