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[CatTech1]

To throw some things out there about wet stacking. I have a 2004 f-350 service truck for work. When i am on a job site in the winter it will not be uncommon for me to let my truck idle at base speed for 4 or 5 hours. The extent of the wet stacking would be a sizable cloud of white smoke when you leave the site and put the truck under load. It will smoke for about a 1/2 mile or so. The white smoke is the unburnt fuel in the exhaust system. We have a truck that had a PTO on it and idles to 1200 rpm for the compressor and the crane. This truck idling high for a few hours will still blow some white smoke when you leave. I think that really there isn't much of a difference with the idle elevated. It deff. keeps the truck warmer. I have inspected the exhaust manifold for any signs of fuel or goop dripping at the end of the day and it seems fine. I have seen people set up exhaust brakes to close at idle to force the engine to build higher exhaust gas temps to prevent wet stacking. We have a few cat C-9's in the bigger trucks that they do this to and it seems to work alot better. I think the brake is only closed part of the way. Well end of the story i have 165,000 miles on my truck and it has idled for extended times. The engine still runs great and has not needed any major service. I hope that may clear up any issues. please post to add or coment on this. Thanks guys