The plastic housing which goes to the upper radiator hose is cracked and leaking?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

Basically the leak is noticed from water outlet and thermostat housing.
But the outlet which is most likely to fail is the water outlet. It is not the thermostat housing. The thermostat is located on the left side of the engine block. This part is commonly a component that fails. It is also the most missunderstood component to techs that have never seen one, and invariably will tell you incorrectly that it is the thermostat housing. 
SEE THE IMAGE BELOW TO CONFIRM HOW THIS PART LOOKS :---


This is called the water outlet housing or coolant air bleeder. It may be mistaken as the thermostat housing when indeed the thermostat housing is at the lower hose on these engines . Dorman Products makes an aftermarket replacement however I always do recommend an original replacement part from the dealer . To replace first make sure engine is cold then drain coolant, disconnect upper hose at the housing. Next you may have to loosen and lift the intake plenum to gain access to the rear bolts of the housing. This does require some special skills as there are usually support brackets in the rear of the plenum that connect to block or cylinder head. Once removed you must thoroughly clean the surface with a scraper and then a fine sandpaper. Last ,be sure to properly fill and bleed your cooling system . This is a very common problem with Dodge cars and Trucks.

This details will help.Thanks.

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For more radiator,heater hose and other engine repairs and solutions,check the list mentioned below:----

How to Replace an Upper Radiator Hose

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-upper-radiator-hose.html

How to Replace a Lower Radiator Hose

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-lower-radiator-hose.html

How to replace Radiator on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-acura-car.html

How to replace Thermostat on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-thermostat-on-acura-car.html

Where is thermostat located on 2006 dodge magnum 3.5L?//

http://repairhelpcenter.blogspot.com/2011/10/where-is-thermostat-located-on-2006.html

Thermostat on AUDI 1.9 TDI?

http://repairhelpcenter.blogspot.com/2011/10/thermostat-on-audi-19-tdi.html

How to replace Radiator on Audi and VW car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-audi-and-vw.html

How to flush cars radiator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-flush-cars-radiator.html

How to Pressure Test a Radiator and Cap

http://schematicsdiagram.blogspot.com/2011/07/how-to-pressure-test-radiator-and-cap.html

How to Replace Heater Core Hoses

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-heater-core-hoses.html

How to Replace a Thermostat.

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-thermostat.html

How to Replace a Radiator

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator.html

How to Replace a Radiator Support

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator-support.html