this is a common problem with alot of different vehicles,,,the most common cause is low coolant. However, there are some updates from Dodge on several cooling system components, and some very nice aftermarket parts available at much lower than manufacturer cost!!! First of all, if your heater isn't working and you "topped off" the coolant to fix it, where did that coolant go?? Coolant like power steering/transmission/brake fluids, are non-consumables,,,so if their low, there a solid chance you have a leak.once you identify where the leak is, you need to correct it. The 2.7 is a little tricky when it comes to coolant leaks, as the H2O pump is internal, and it doesnt leak directly under the center of the engine.The thermostat housing although seemingly made of cheap plastic, is quite durable and usually only leaks when those "cheap" rubber gaskets fail, this can be solved by a good cleaning and Permatex Right Stuff sealer.The other more common leak is at the crossover housing between the heads on the front of the engine, because some "genius" over at R&D though it was a good idea to press/glue a brass bleeder fitting into a plastic housing, no doubt he works in the mail room now!!!The replacement part can be purchased from your local Mopar Parts distributor. Orange or Red Coolant BAD,,,,GREEN COOLANT GOOD. All the research has been done for ya, if it was good enough for Dad's 71 Cuda, its good enough for your aluminum block V-6.
