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Black smoke is rich mixture, so something is wrong with the fuel management system. Get is connected to a pro grade scan tool computer and check long term and short term fuel trim. Check for fault codes on sensors.
After you repair the fault causing the code you will need a scan tool capable of erasing the fault code. If it keeps coming back after that you have not repaired the problem. There is no other way to clear the code except a scan tool
Seems like the temp sensor is grounded after the heat up, Unhook the battery positive terminal for 3 minutes, make sure the coolant is full in the radiator, hook the positive terminal on the battery and start the vehicle, IF it does not start scan for codes and let me know, what codes you find?
Ball joints, motor mounts, sway bar link rods? Hard to say without actually hearing the noise, but an experienced Volvo tech should be able to diagnose this pretty quick.
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