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This is a FYI. My 2006 6.0L F350 started loosing small amounts of coolant a couple weeks ago. I noticed dried coolant spray around the degas bottle as well as all over the front of the rear axle. There was also coolant dripping from around the transmission pan. I took it to the local dealer and they found the coolant 'hose' that runs from the firewall heater core on the passenger side of the firewall over to the degas bottle was hanging loose and rattling against the driver side turbo up pipe. It eventually (40 months) wore through the coolant hose. Although it's called a "hose" it is a metal pipe with rubber hose ends on it. The metal piece is approx 2' long and has two flanges welded to it so the hose can be clamped to two corresponding studs sticking out of the front of the top of the firewall. Neither the flanges nor the studs showed any indication they were ever properly mounted to the firewall. The body paint on the studs was original and untouched as was the black paint on the pipe mounting flanges. Conclusion is the slacker working the line the day my truck was built never bolted the hose to the firewall.
Check yours out by looking for a 3/4 inch black metal pipe with rubber ends mounted along the top of the firewall. If you can see studs above the pipe then yours is also probably not mounted properly. If you are a Ford mechanic please keep an eye out for other units where this pipe was not properly attached to the firewall and save someone the hassle associated with its failure.
Ford said that coolant pipe is not covered under the warranty. The coolant pipe (p/n 3C3Z-18472-BB) cost me $100 and labor was $225.
Possible fallout: coolant burns from steam/coolant coming out of the pipe. Exhaust gas leaks from where coolant pipe also may wear thru exhaust pipe. Coolant spilling below truck where pets can lick it up.
Last edited by robtsgt; 05-07-2009 at 02:12 AM.