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Message: <blockquote data-quote="cobrajeff96" data-source="post: 1577658" data-attributes="member: 29141">Guys, 220*F on a 91* day with full accessory load (A/C running full blast) is fine. As long as the temp cycles back and forth between the 200 - 220 range it means the coolant system is functioning normally. Any OBD reader that can pull the coolant temp real time is probably one of the best troubleshooting tools you can have. Watch the temps during a fan activation cycle:  temp should climb to 200, and you ought to hop out of the driver seat while the car is parked and feel for the LSF activation right around 208 as previously mentioned. And if the LSF is not enough then the high speed will kick on a bit later. Of course when the A/C is activated the HSF will engage to keep the condenser cool so that the A/C pump doesn't self-grenade.About the only thing you could do at this point is get a higher pressure rated cap, this raises the boiling point even higher and increases your safety margin, though some would say it could be overkill for your situation. Of note, the higher the cap rating, the more you need to pay attention to the condition of all coolant hoses. Higher system pressure will accelerate the wearing in of all coolant components in general. If they're silicone hoses or even just rubber hoses that are still newish and in good condition then you don't have anything to worry about for a while.</blockquote>