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Old 07-11-2013, 08:50 AM
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Cooling issue, new everything! STUMPED! HELP

Ok guys I need help. New radiator, water pump, coolant temp sensor, and t-stat. Truck runs fine no leaks but when I drive it, it gets up around 220-240. Fan works, brand new CAT ELC coolant, put the system under a vaccum to fill and still gets hot. Heater does not blow super hot more like warm. If i bring it back to idle it will start to drop back down. EOT's are normal just ECT is high. Any suggestions?


Chris.
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Old 07-11-2013, 03:29 PM
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Drained all coolant, doing a complete system flush then running the coolant cleaner for a hour and a half just to make sure there isnt any build up. Then trying again...

Chris.
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Old 07-11-2013, 06:00 PM
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Update: Coolant system cleaned, filled back with coolant and drove it. Results are, driving and truck ECT are at 216, EOT is at 210 fan is on and ECT goes up to 220, EOT 220, heater isnt hot and i floor it, ECT jumps to 234, EOT 222. Come to a stop to turn around and it drops down to 212 in the matter of 15 seconds, and maintains that until I come back up to 50 mph and its back at ECT 220, EOT 220. Riddle me that Batman.


Chris.
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Old 07-11-2013, 06:06 PM
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What year of truck and dumb question....is the front of the grill open?
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Old 07-11-2013, 06:08 PM
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Thermostat possibly?

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Old 07-11-2013, 06:21 PM
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2005 6.0

The grill is stock and open as it would be. Ive put two brand new t-stats in it and same thing.


Chris.
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Old 07-11-2013, 06:27 PM
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Any mods to the truck? How did the original coolant look when you dumped it? The heater core probably just has air in it as it sits fairly high relative to the rest of the cooling system.
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Old 07-11-2013, 06:31 PM
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I just put this engine in the truck. It was pulled from a running truck. The original engine threw a rod. This engine has 225cc Elite injectors, k&n cold air, arp studs, 5" mbrp straight pipe, edge juice attitude. My EGT's aren't high.


Chris.
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Old 07-11-2013, 06:31 PM
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Egr deleted.
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  #10  
Old 07-12-2013, 05:36 AM
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Gauge, blockage of some type or water pump issue. Try running without the T-Stat and see how you do. There is no way your ECT should be higher than the EOT if you are up to normal operating temp.
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