06 with 130K miles. Water pump, radiator and timing belt at 100K. Last couple of oil changes I've had to add coolant to the overflow tank. Getting a little worse. Removed all of the engine covers and skid pan. If I look down from the drivers side of the engine I see some red fluid on the casting of the front diff. Looking up from the bottom I just see some pink crusty stuff on the bottom of the ac compressor. Also some crusty stuff on the hose from the oil filter base to the block. Any hints where this may be coming from? Thanks in advance.