Remove Old Hoses

• 1). Buy the water/coolant hoses specified to fit your Jeep Grand Cherokee. These will be Gates #23037 for the upper hose and #23038 for the lower hose. Other brands are available and they will all fit specifically in the area meant for them on the Jeep Grand Cherokee.
  
  
• 2). Ensure that you know the correct placement of the two hoses connected to the radiator before beginning the replacement. Your new hoses will have the same shape. Loosen the old clamps on the radiator hoses with a flathead screwdriver. Move it toward the middle of the hose.
  
  
• 3). Capture a picture of the original placement with a digital camera so you can replicate it. Mark where the old hose came to on the machinery so you can install the replacement at the same point and avoid leakage.
  
  
• 4). Slit the top of the old hose with a utility knife if it has seized to the machinery. Cutting just a couple of inches below the insertion point will allow you to peel it away as needed. Use a piece of coarse sandpaper to clean the area where the hose was stuck to the automobile part. Clean the other connection areas while they are free.
  
  
• 5). Block the rear wheels and jack up the Jeep Grand Cherokee one side at a time. Place a container on the ground below the radiator to catch the expelled coolant so it does not go into the storm drains or the ground water.
  
  
• 6). Take out the bottom hose or drain the radiator by opening the spigot located at the bottom. Remove the top hose by slipping it off the radiator shroud at one end and the thermostat housing at the other. Discard all the used hoses and clamps. Sand the areas where the old hose met the Jeep Grand Cherokee parts to remove pieces of hose and other grit.
  
  

Install New Hoses

• 1). Reverse the steps used in removing the old Jeep Grand Cherokee hoses to install the new ones. Use adjustable clamps with screws for greater protection in holding the new hoses in place.
  
  
• 2). Place the clamps on the top hose and slide toward the middle of the hose. Push the hose securely onto the top opening in the radiator shroud at one end and the thermostat housing (at the top of the water pump) on the other. Tighten each clamp by tightening the screw.
  
  
• 3). Repeat the above step for the clamps as you connect the hose to the bottom radiator shroud at one end and the bottom of the engine at the other. Adjust the clamps into place and tighten the screw.
  
  
• 4). Recycle the original coolant and finish filling the radiator with a 50/50 mix of coolant and water up to the cap line. Refill it more as it goes down. Do this until it stops percolating and making room for more coolant. Start the engine with the radiator cap still open.
  
  
• 5). Start up the Jeep Grand Cherokee. The thermostat will get warmer and the fluid will drop as the coolant begins to circulate. From here, you can finish filling up the radiator. Replace the radiator cap and fill up the overflow reservoir to the line marked "full."
  
  
• 6). Check to see that the temperature gauge does not run higher than before, the drain plug is closed and there are no leaks at the hose connections (or anywhere else).