Alright so my brother has a 94 5.2L Grand Cherokee. Been a great first car for him except for a reoccurring coolant leak. It leaks from the lower left side bolt on the water pump that goes into the water jacket. Bolt was sealed with loc tite thread sealant when we put it back together with a new water pump several months ago. All the bolts for the water pump are new. Anybody have this happen before? This is the second time it's done this. Both times it happened out of the blue, with the jeep just sitting there parked.