My BMW 524td will not start. How can I fix this?
When your BMW 524td is not starting, you first need to distinguish if it cranks but doesn't start or if it does nothing at all. The first one means that the engine is spinning but doesn't catch and run on its own, and if it's the other type of no-start condition, then this means the engine is not moving at all. If your car does nothing at all when you turn on the ignition, the first thing you need to check is the battery, as it's the number one cause of this type of condition. The quickest way to check your battery is to turn on your car's headlights. If they light up nice and bright and not dim or dull, then this means that the battery's okay. Then, your next step would be to check the battery connections as they might be corroded. On the other hand, if you can hear your car's engine crank but still doesn't start, then the starter, cables, and battery connections should be good. The parts you should diagnose now should be the fuel supply, the spark plug, and your car's mechanical integrity.
My BMW 524td seems to have lost its ability to burn diesel. After driving for 10 to 15 minutes, the car feels like it has lost all of its power, often creeping at snail-like speeds instead of accelerating like a normal vehicle. What seems to be the problem?
The problem could be either there's poor fuel supply to the rail, injectors, or pump, or the rail or injectors are not holding the fuel within the system. To diagnose this properly, start from the tank and make sure that there's enough fuel available to the pump. If there's enough fuel available to the pump, check if the pump is delivering fuel, then loosen the supply pipe from the pump to the rail and inspect the fuel delivery. Try putting a finger over the pump outlet and see if you can stop the delivery. In this part, you should not be able to stop the flow with your finger as the pressure builds up. If you manage to do so, however, then this confirms that the fuel pressure is low and your engine is not getting enough to run normally.
The cylinder head of my BMW 524td keeps cracking, and I've already replaced it for several times. How can I find out what's causing this?
There are many possible problems that could have caused the cylinder head to crack, but the most possible one would be the component it's connected to. Thus, the first thing you need to do is examine this part of the engine. Lift the hood and then secure it in place using a prop before working beneath it. Before you do this, make sure that the engine is cold first and have your car's manual on hand. It should have instructions on how to properly install the affected component. Once you have fixed that part, it's time to install a new cylinder head.