One problem related to water pump has been reported for the 2008 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Jeep Grand Cherokee based on all problems reported for the 2008 Grand Cherokee.
I was driving 15 to 20 minutes from home and my check engine came on. I immediately took it to my local gas station (25 yrs relationship) and the car stalled while close to the station losing all steering power. The owner took a look and said give me 24hrs to diagnose. The next day he showed me what happened. . . . The water-pump internal bearing has broken causing the shaft to move back and forth causing the internal water-pump flywheel to break apart. This caused the water pump to dump all the coolant on the ground within 15 to 20 minutes. Final diagnosis was the engine seized due to lack of coolant pumping thru the engine. A new engine was the only solution. I can understand the water-pump having minor leaks with gradual leakage . . . This would have been caught by the puddles under the engine but not the rapid drainage I experienced. I reach out to Jeep hotline. . . . Told the story and was willing to provide photos and physical parts for their qa and rd department to evaluate for design flaw. They were not interested and told me sorry out of warranty. . . And gave me no support or directions to send photos or physical parts. I'm concerned about other drivers who may experience this situation where death and injury may occur. I tried to attach 5 photo below. . . Let me know if all 5 came thru. Thanks for your support. Remember all the failure was inside the sealed water-pump so corrosion and potential external rust issue was not a factor. Thanks in advance . . . . . . . Warren m. Ziegler.