Three problems related to manifold/header/muffler/tail pipe have been reported for the 2002 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Jeep Grand Cherokee based on all problems reported for the 2002 Grand Cherokee.
I have a 2002 Jeep Grand Cherokee. It has 85,000 miles. It began losing coolant. The mechanic determined it was a head gasket. After taking the engine apart, it was discovered that a casting defect in the intake manifold caused the problem. There was a water jacket covered by casting material at manufacture.
Intake manifold crack feeding cylinder #1.
When I tried to start my 2002 Jeep Grand Cherokee, there was a loud bang and the smell of something that had burned. The next day I had the vehicle towed to the dealer. I was told that the intake manifold blew off and the parts are on backorder. It has now been over a month and I was told it will be another month before parts will be received. The dealer told me they had never seen an incident of the type I experienced. I have contacted Chrysler three times and have been told on each occasion that they will not financially participate in the repair.