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Message: [QUOTE="bismic, post: 1476338, member: 1537"] Sorry if you have done these things already (I scanned the thread but did not go back and read in detail). The suggestion to go back to stock tuning before troubleshooting is an excellent one! Make sure your coolant level in the degas bottle is good (it looks low to me). When you inspect the level, look down into the bottle and make sure there isn't any sludge or solids in there. Drain a gallon coolant sample and test it for antifreeze concentration and look for rust or sand or contamination. You can filter it through a towel or cloth and reuse it if you are clean with it. Since the radiuator is fairly new, then none of this is probably an issue, but who knows. If you have an EGR removal and you no longer have an EGR valve plugged in, sometimes this messes with the cooling fan operation. If this is your issue, buy an EGR valve and just plug it in. Secure it in an out of the way place in the engine well. Throw a new thermostat in it (even if you have done it, I would probably throw another one in). Carefully clean the fins on the A/C condensor that are in front of the radiator (soap and water at low pressure). Could be you have a weak water pump. IMO, that would be the last thing to try. If you can overheat fairly quickly at idle, but then get out on the road and get air moving and it seems to be cooling a little better, then the issue may be the water pump. The EGT's are too high,IMP it is the fault of either the tuning or the turbo or both. I am not a Sinister fan. [/QUOTE]

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