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It was a really hot day!
You had the pump changed could the noise be the cooling fan running all the time?
Perhaps they didn't put enough coolant into the system?
Plenty of other posts wanting that there isn't a low coolant warning in the X1.
Also other stating the coolant system can get an air locked easily when topping up.
Could be a combo of both so the engine is overheating and the fans are on constantly.
Also the mounts I think are vacuum controlled could the hose that connects to the mount have been left disconnected? Engine will bounce around a lot when asking for power at speed and rotate with torque if one mount stays soft.
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