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      05-28-2023, 03:36 AM   #2
Serf27
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Drives: 335i
Join Date: Apr 2018
Location: Sitting in a BMW.

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Puff of smoke could have been left over carbon that was loose but not cleaned out of the intake ports.

I wouldn’t trust that pieces of the belt didn’t get into the engine. Did you turn the engine with the valve cover off to see if any pieces of belt came back up?

Radiator fins could have gotten damaged and are not leaking.
A lot of pressure on the upper radiator hose could have cracked the radiator neck.
Could also be leaking from where the plastic end tanks connect to the radiator fins.

Burnt smell was probably the starter.
Any starter codes?
Too much strain on the starter could be from a failed/seized pulley(belt wrapped in a pulley),
seized engine if the belt blocked the oil pick up tube, but you didn’t mention any knocking noise.

Engine can/will start with no radiator and bad alternator.

Start by removing the belt and turning the engine by hand and see how it turns.
Check pulleys and make sure they spin freely.
Check for pieces of belts stuck behind pulleys.
Start engine with belt removed.
Start engine with belt on and coolant filled, see where the leak is coming from.
Removing the oil pan to check the oil pick up tube would be ideal.
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