A: To remove the four-cylinder and 3.7L V6 engines, start by disconnecting the battery's negative terminal and draining the cooling system. Remove the Coolant Reservoir/windshield washer reservoir assembly on V6 models, as well as the cooling fan(s) and shroud. Take off the drivebelts and water pump pulley, and on 2.4L four-cylinder engines, remove the timing belt, timing belt idler pulley, camshaft sprockets, and rear timing belt cover. For 3.7L V6 engines, detach the lower radiator hose from the pump. On 4.0L engines, remove the air filter housing and the right engine mount through-bolt. Use an engine hoist to raise the engine slightly and secure it in place with a jack. Remove the air conditioning compressor mounting bolts and the accessory drivebelt bracket and timing belt. Remove the water pump bolts and detach it from the engine. Clean the bolt threads and threaded holes, and compare the new pump to the old one to ensure they're identical. Remove any old gasket material and clean the engine and new water pump mating surfaces. Apply ATV sealant to the new water pump O-ring for four-cylinder engines or to the gasket mating surface for 3.7L V6 engines. Attach the pump and O-ring/gasket to the engine and tighten the bolts in a criss-cross pattern. For 4.0L engines, install a new O-ring seal in the water pump groove and carefully mate the pump to the engine. Install the water pump mounting bolts and tighten them. Reinstall all parts that were removed for access to the pump, refill the cooling system, and check for leaks.
Q: How Can You Check for a Failure in the Water Pump on Jeep Liberty?
A: Failure in the water pump can cause engine damage due to overheating. To check for leaks, use a flashlight to find the weep or vent hole on the water pump from underneath. If the water pump shaft bearings fail, there may be a howling sound at the front of the engine.