Question about 2001 Chrysler 300M

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Coolant leak that passes pressure tests...

My girlfriend's 300M is dripping coolant below the driver's side front grill, just below the corner of the radiator. The system has been pressure tested by 2 shops, and both reported no leaks in the system. Three observations: 1) The dripping is coming from coolant collecting on the sheet metal which lays directly below the radiator. This I'm sure of, because if one lifts the driver's side of the car, the dripping will transfer to the same approximate location on the passenger side of the car. There are no observable signs of leakage on any visible part of the radiator. 2) There are (if I recall correctly) 3 rubber hoses which enter the area just above where the coolant drips on the driver's side, one of which I think goes to the overflow reservoir. I cannot visually confirm, but these hoses look like they all tie together (via a fitting?) just above the area of the dripping, but out of sight. 3) The overflow reservoir has a worn cap groove (one can continually rotate the cap from loose-to-tight-loose again, but I can see no signs of leakage via the cap, nor have I observed any fluids traveling along the outside of the rubber hose attached just below it. The cap was replaced by one of the shops as a favor, and one can make it stay tight, but because of the worn groove, there's no guarantee it will stay tight; however, the leak, wherever it is, doesn't seem to correspond to a loose or tight cap. It just leaks once the coolant is warm/hot. My question is this...do those 3? rubber hoses I described above in fact tie together via a fitting or something? If so, I'm inclined to believe the leak could be right there, but I can't see it to know, but it might help to point somebody qualified in that direction. Any other suggestions about where the system might end up dripping from the sheet metal as I described, AND which wouldn't also be included in a pressure test? Thanks.

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The plastic radiator tank on one side,is most likely cracked and leaks, when under pressure,hot and your driving.

Posted on May 27, 2010

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