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Diesel pulling trailer lost power check temp light came on..

Car: Ford, F350, 2007     -    Back to Fix-It    -    Ford Repair Manuals

Q.2007 f350 dually diesel pulling trailer lost power check temp light came on found a service shop the reserve tank had broke and hose came off, found parts repaired left shop truck got hot still no power when getting over 40 turned around and cooled down as long as kept under 40 threw diesel everywhere on side of truck reserve tank looked like rusty color and hose had broke / blown off under reserve tank.

Answer The problem with your truck is most likely casued by head gasket failure. The internal pressure build up in your cooling system is caused by a leak from the combustion chamber into the cooling system.
There is a service bulletin from ford on this concern that requires checking the egr cooler and head gaskets.
FORD: 2003-2005 Excursion
2003-2007 F-Super Duty
2004-2009 E-Series
ISSUE:
Some 2003-2007 F-Super Duty, 2003-2005 Excursion and 2004-2009 E-Series vehicles, all equipped with a 6.0L engine, may exhibit:
Coolant venting from the degas bottle cap
Internal engine coolant leak (possibly resulting in a hydro-locked engine).. >> login for more

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