Were all those parts bad or was that how you tried to diagnose a problem? Were you losing coolant before all those parts were replaced?
If the leak is too small to find by pressurizing the system you might consider adding a small bottle of dark purple dye to the coolant. Drive the truck long enough for some coolant to be lost, then you search with a black light. The dye will show up as a bright yellow stain that you can follow back to the source. Don't overlook a leaking heater core. Dye will show up inside the condensate drain hose if the truck came with air conditioning.
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Friday, September 21st, 2012 AT 2:39 AM